/r/universe

Photograph via snooOG

The Universe is a forum for sharing and discussion of Astronomy, Astrophotography, Astrophysics & Cosmology.

The Universe is a forum for Astronomy, Astrophotography, Astrophysics & Cosmology

New to the Universe? Read our Subreddit rules before posting!

Submission Rules

  1. Submissions should not consist of personal and uninformed pseudo-scientific rambling. We will be a platform for information and news about the study of the physical universe.
  2. Posts must contain a subject or a question about astrophysics in the title — be specific.
    We will not accept titles containing only the words "help please" or "space question".
  3. Posts must be relevant.
    We like everything from educational videos, questions, news, discussion articles, published research, course content, astrophotography, and study resources about astronomy, astrophysics, and cosmology. This means no low-effort posts, jokes or memes.

Comment Rules

  1. Be respectful to other users.
    All users are expected to behave with courtesy. Demeaning language, sarcasm, rudeness or hostility towards another user will get your comment removed. Repeat violations will lead to a ban.
  2. Don't answer if you aren't knowledgeable.
    Ensure that you have the knowledge required to answer the question at hand. We are not strict on this, but will absolutely not accept assertions of pseudo-science or incoherent / uninformed rambling. Answers should strive to contain an explanation using the logic of science or mathematics. When making assertions, we encourage you to post links to supporting evidence, or use valid reasoning.
  3. Be substantive.
    Universe is a serious education/research/industry-based subreddit with a focus on evidence and logic. We do not allow unsubstantiated opinions, low effort one-liner comments, memes, off-topic replies, or pejorative name-calling.

Universe Wiki

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/r/universe

28,919 Subscribers

3

“The Infinite Path to Inner Light”

“Unlock the secrets of the universe with The Book of Wisdom! Dive into timeless insights and life-changing truths. Don’t miss out grab your copy today at https://stan.store/Cosmicphotos

2 Comments
2024/12/03
00:14 UTC

38

Is this helix nebulla?

2 Comments
2024/11/29
03:22 UTC

8

Is there a year-long time-lapse of night sky?

I am trying to find a year-long time-lapse of the night sky, taken at the same time from the same place every day, to observe how the sky changes relative to the Earth as it orbits the Sun. Can I find it somewhere and look at it?

1 Comment
2024/11/27
08:32 UTC

8

Is heat is the most fundamental type of energy? Will energy exist forever with no doubts (give percentage /100 100 being yes 0 being no)?

7 Comments
2024/11/24
20:00 UTC

2

Cosmic Balance and how it works.

Our universe is an amazing and very confusing. Thinking about matter that gravitationally works in reverse to normal gravity could help resolve outstanding mysteries in cosmology. We observe this behavior with black holes(pushes on a galaxy and it is attracted and not pushed away), Neutron stars(can be a collapsed star with normal gravity or turn into a Neutron star attracting matter and not pushing it away) and “Dark Matter/Dark Energy we see, but what is it? The idea that matter could come toward you when you push it away, or that it could rise freely against the pull of the Earth’s gravity certainly sounds outrageous, but this is what we observe over and over. In the everyday world, when an object is pushed, it accelerates in the same direction as the force applied to it(normal gravity); this relationship is described by Isaac Newton's Second Law of Motion. So why do we see motions in the universe that go against these laws or work in reverse? What can explain what we see?

So how does this Cosmic Balance work then?

In our world of positive energies and positive mass.When two positive energies collide, a Higgs field is created under positive influence and that causes normal gravity, time to flow in clockwise direction and under normal gravity to flow forward, the Higgs field causes the energies to spin in a clockwise motion (which is in the positive direction assigning positive mass), the “frequency” of the spin determines the mass weight assigned and then the field disappears and it creates positive mass, thus giving off photons and binding matter together. Normal gravity causes the electromagnetic field to encompass galaxies holding matter, also pulls mass down thus creating pulsars giving off millions of photons.

Recent discoveries

Colleagues cooled rubidium atoms to just above the temperature of absolute zero (close to -273C), creating what's known as a Bose-Einstein condensate. In this state, particles move extremely slowly, and follow behavior predicted by quantum mechanics, acting like waves. To create the conditions for negative mass, the researchers used lasers to trap the rubidium atoms and to kick them back and forth, changing the way they spin (meaning they changed the direction of spin, and the direction of spin assigns mass). When the atoms were released from the laser trap, they expanded, with some displaying negative mass. "With negative mass, if you push something, it accelerates toward you," said co-author Michael Forbes, assistant professor of physics at WSU. "What's a first here is the exquisite control we have over the nature of this negative mass, without any other complications," said Dr Forbes. This heightened control also gives researchers a tool for exploring the possible relationships between negative mass and phenomena observed in the cosmos, such as neutron stars, black holes and dark energy since they ALL display reverse gravity we can see and it displays the same motions of neutron stars and black holes. 

Natural occurring negative mass in our universe.

 Sound/Phonons: "In a gravitational field phonons slowly accelerate in the opposite direction that you would expect, say, a brick to fall," one of the team, Rafael Krichevsky. In 2018, however, Riccardo Penco at Carnegie Mellon University and Niciolis and made an astonishing discovery when observing particle-like sound waves (called phonons) propagating through superfluid helium, cooled close to absolute zero. They found that the phonons moved in upward trajectories, against gravity. Contrary to classical models of sound waves, this implied that the phonons were coupled to gravity, allowing them to carry minuscule amounts of “negative effective gravitational mass” as they travelled. The calculations show that sound waves carry a tiny negative mass, which means that in the presence of a gravitational field, such as that of the Earth, their trajectory is bent upwards.

 Light/Photons:

The University of Rochester researchers say they've developed a device that can create particles exhibiting negative mass, by combining photons from laser light and excitons in a semiconductor. Normally, light is bounced between a pair of mirrors facing each other, and the space where that light is confined is called the optical cavity, or microcavity. In this device's optical microcavity, the team placed an atomically-thin semiconductor made of molybdenum Di selenide, where it could interact with the confined light. Excitons in the semiconductor combined with photons in the confined laser light to form new particles called polaritons, which have negative mass.

 So we created natural negative mass, we observed the gravity working in reverse and we find it naturally occurring in our universe. How does it work?

When two negative energies collide and a Higgs field is created it is under negative influence, gravity is in reverse, time flow is reversed in a counter clockwise motion and it causes the two energies to spin counterclockwise producing flow in a negative direction which assigns negative mass, the “frequency” of the spin determines the mass weight assigned and the field disappears and the energies are now negative mass working in reverse, the field absorbs and no photon is given off. Since this is reverse gravity, when a particle pushes another negative mass particle the force is pushed back towards the particle thus holding them together until such time that the gravitational pull is so strong that a black hole is formed. Reverse gravity has an upward trajectory which is why you see the arch stretching upwards above the event horizon. In the case of a neutron star, the body of a star collapses from losing all of the electrons so matter falls until collision, at which point the Higgs field appears and if it’s under the influence of positive energy it becomes just a collapsed star, but if the field is negative it then becomes a neutron star.

The Higgs field is determined based on energies present at the moment of collision. Under positive energies EM is positive, gravity runs forward, time runs forward, direction of energies spin is clockwise assigning positive mass. Under negative energies the Higgs fields EM is negative, gravity flows in reverse and time is reversed and energies spin is counterclockwise providing negative mass. It determines gravities direction of flow, energies spin either forward or reverse to assign mass and time flows either forward or in reverse all based on the field created.

So what is the dark matter we see?

When a galaxy is pushed by negative mass, it attracts it in the same way as a black hole meaning that gravity is in reverse so pushing on an object causes attraction, however the negative mass has not grown strong enough to create conditions for a black hole to occur. This takes the size of the negative mass to reach a point when negative EM field is so strong that a black hole is created. When the galaxy approaches negative mass, the negative mass has a negative electromagnetic field in which as charges change, the field absorbs the photon and it is not given off. There is a change in charges, so photons are giving off in a positive EM field, but not in the negative EM field. What we are seeing is dark electrons in a negative electromagnetic field that through a telescope appears to be matter. Sound waves have been measured to be negative mass, they have an upward trajectory because gravity is in reverse and no photons are given off because they were absorbed by the negative EM field, thus appearing to be dark.

How does black holes form?

First, we must explore all mechanisms that make black holes different than what we observe in our solar system with “normal gravity”. Black holes gravity is working in reverse of Newton’s Laws. We know this for a fact because we observe a black hole pushing on a galaxy, and “normal gravity” says that a force pushing should be pushed away, and it pulls back into the black hole. Based on source 1, scientists created negative mass, measured it and see the reverse gravity in action with their own eyes, and this negative mass exists in sound waves (source 5) and lights waves (source 8) naturally in our universe. Second, we look at the arch extending in an upwards trajectory over the accretion disk (see source 2). This is why the arch extends upward, which is against “normal gravity” as normal gravity pulls everything down so if this were in a positive EM field, then the arch would extend under the accretion disk. So these three things (gravity of black hole in reverse, creating negative mass and observing this behavior, seeing the trajectory of the arch extend up against normal gravity show us that it’s negative mass that is causing the reverse gravity in “spooky action”. Negative mass creates a negative EM field which causes gravity to work in reverse and until enough negative mass is collected it’s just clouds of negative mass in negative EM fields and electrons that don’t give off any light because photons are absorb, so you only see the negative EM field because the change in charges cause the positive EM field to give off photons so we see dark matter or really negative EM fields holding electrons dark, however the negative mass has not grown strong enough to create conditions for a black hole to occur. See source 6, which explains that two Neutron stars are made from negative mass with a negative EM field. In the case of a neutron star, the body of a star collapses from losing all of the electrons so matter falls until collision, at which point the Higgs field appears and if it’s under the influence of positive energy it becomes just a collapsed star, but if the field is negative it then becomes a neutron star.

We know this because when the two Neutron stars collided into each other, which is the reverse that gravity works. Example the moon is being pushed by Earth's gravity, but yearly it is getting further away from Earth. This is normal gravity and it does not apply to the actions we see. This takes the size of the negative mass to reach a point when negative EM field is so strong that a black hole is created, which is exactly what happened when two Neutron stars collided, in a negative EM field causes enough negative mass to create a black hole. We see this happen with our instruments, and this makes perfect sense based on what we see and that we saw a black hole created. So this clearly explains the formation of black holes.

So how does the expansion/contraction of space work? 

At the moment before the big bang, positive matter have positive EM fields and normal gravities applies to all positive energies and positive mass. Negative energies and negative matter have negative EM fields and reverse gravities applies to all negative energies, and when it pushes on an object, it is attracted and not pushed away (reverse gravity). At the moment before the Big Bang, this negative mass holds the positive matter/energy tight against the negative matter/energy in a small space because the field of negative matter/energy is strongest at this point. Meaning that positive matter into a zillion pieces has less gravity than a collection of mass with weight. In this broken down state, positive EM field is at its weakest. The positive matter wants to be pushed away, but the negative EM field attracts and holds it until a nuclear force are strong enough to break negative reverse gravities force and that’s the big Bang as we know it. All matters and energies are shot out in space. This is the beginning of the expansion of space. Positive matter collects together and becomes matter, solar systems and galaxies through positive gravity. Negative matter/energies collect together. At this point they are clouds of energies, and through collisions they take on their matter based on the Higgs field and whether it is influenced by a positive energies or negative energies. At some point enough negative energy/mass collects and when the force of negative EM is strong enough, it then becomes a black hole. Until that time, you will see clouds of negative mass/negative EM field absorbs current changes, so only positive EM field shows photons. This is the dark matter we see, only it’s negative EM field. Black holes push on galaxies and because of reverse gravity with a negative EM field, they attract matter instead of pushing it way. As black holes continue to break positive matter apart, and collecting negative energy/matter. The more positive matter broken down, the slower the expansion of space until such point that there is more negative matter collected than positive matter, the stronger negative EM field contracts space only to repeat the cycle. Super Massive Black holes is the mechanism that breaks matter down at a huge pace which clearly goes to expansion and contraction of space. Matter in tiny particles has a very weak EM field, so at some point when enough matter is broken down, the negative mass/negative EM field will contract space. Super Massive Black holes is the mechanism that breaks matter down at a huge pace which clearly goes to expansion and contraction of space. Matter in tiny particles has a very weak EM field, so at some point when enough matter is broken down, the negative mass/negative EM field will contract space. 

 
Below is source information to provide support.

1 – Scientist’s create Negative Mass, behaves in reverse from Newton’s Laws.

Physicists have created a fluid with "negative mass", which accelerates towards you when pushed, which is opposite from Newton’s Law, and is stable (1). Colleagues cooled rubidium atoms to just above the temperature of absolute zero (close to -273C), creating what's known as a Bose-Einstein condensate. In this state, particles move extremely slowly, and follow behavior predicted by quantum mechanics, acting like waves. To create the conditions for negative mass, the researchers used lasers to trap the rubidium atoms and to kick them back and forth, changing the way they spin. When the atoms were released from the laser trap, they expanded, with some displaying negative mass. "With negative mass, if you push something, it accelerates toward you," said co-author Michael Forbes, assistant professor of physics at WSU. "What's a first here is the exquisite control we have over the nature of this negative mass, without any other complications," said Dr Forbes. This heightened control also gives researchers a tool for exploring the possible relationships between negative mass and phenomena observed in the cosmos, such as neutron stars, black holes and dark energy.
Physicists observe 'negative mass' - BBC News

2 – Phonons/sound travels upward against “normal” gravity”.

The experiment was conducted in zero-temperature super fluids, which are a strange type of fluid that flow with no resistance at all at temperatures close to absolute zero (2). Under those conditions, Nicolis and his team reported seeing phonons' trajectories bend upwards, seemingly in opposition to the effect of gravity. "In a gravitational field phonons slowly accelerate in the opposite direction that you would expect, say, a brick to fall," one of the team, Rafael Krichevsky. In 2018, however, Riccardo Penco at Carnegie Mellon University and Niciolis and made an astonishing discovery when observing particle-like sound waves (called phonons) propagating through superfluid helium, cooled close to absolute zero. They found that the phonons moved in upward trajectories, against gravity. Contrary to classical models of sound waves, this implied that the phonons were coupled to gravity, allowing them to carry minuscule amounts of “negative effective gravitational mass” as they travelled.
Researchers suggest phonons may have mass and perhaps negative gravity

3 - The Leggett-Garg inequality is violated with Neutron stars.

Neutrons Defy Classical Physics in Astonishing Experiment - Quantum theory allows particles to exist in superposition states, defying classical realism. The Leggett-Garg inequality tests this by comparing quantum behavior against classical expectations. Recent neutron beam experiments at TU, Wien confirmed that particles do violate this inequality, reinforcing the validity of quantum theory over classical explanations. In 1985, a way of measuring this was proposed: the so-called “Leggett-Garg inequality.” Any theory that describes our world without the strange superposition states of quantum theory must obey this inequality. Quantum theory, on the other hand, violates it. Measurements with neutrons testing this “Leggett-Garg inequality” have now been carried out for the first time at TU Wien – with a clear result: the Leggett-Garg inequality is violated, classical explanations are not possible, quantum theory wins. The results have now been published in the journal Physical Review Letters (5). Which means that Neutrons don’t behave as “normal “ matter as they show reverse motions of gravity. The neutrons behave in a way that cannot be explained by any conceivable macroscopically realistic theory. They actually travel on two paths at the same time, they are simultaneously located at different places, centimeters apart. The idea that “maybe the neutron is only traveling on one of the two paths, we just don’t know which one” has thus been refuted.
Mind-Bending Discovery: Neutrons Defy Classical Physics in Astonishing Experiment

4 - Time runs both ways.

A few years ago, we experimentally proved the laws of physics are different depending on which direction time runs. Here's how we know. The second reason is that we live in a Universe where there's more matter than antimatter, but the laws of physics we know are completely symmetric between matter and antimatter. Digging through nearly 10 years of data from billions of particle collisions, researchers found that certain particle types change into one another much more often in one way than they do in the other, a violation of time reversal symmetry and confirmation that some subatomic processes have a preferred direction of time. Lead researcher Dr. Gordey Lesovik, who heads the Laboratory of the Physics of Quantum Information at the MIPT, said: “We have artificially created a state that evolves in a direction opposite to that of the thermodynamic arrow of time.”
Russian Scientists Used a Quantum Computer to Turn Back Time

5 – Sound waves carry negative mass.

Using a theoretical approach called effective field theory, which is commonly used in particle and solid-state physics, the team calculated the mass carried by a sound wave packet propagating though a superfluid. The calculations show that sound waves carry a tiny negative mass, which means that in the presence of a gravitational field, such as that of the Earth, their trajectory is bent upwards. Esposito and colleagues found that sound waves also generate a small gravitational field. Although the mass of sound waves is tiny, it could be measured in experiments with cold molecular or atomic gases. The work might be relevant for neutron star dynamics, because gravitational fields would affect the physical properties of the superfluid stellar core.
Sound carries mass | Nature Reviews Physics

Example 6 – two Neutron stars produce a black hole.

Scientists just got to watch nearly the entirety of a kilo nova explosion caused by a neutron star merger, thanks to a multi-national telescopic effort. The kilo nova briefly mimicked the conditions immediately following the Big Bang, and allowed scientists to confirm the source of the heavy elements Strontium and Yttrium for the very first time. The massive explosion also produced the smallest black hole ever observed. The attraction between two neutron stars is because negative mass's gravity is in reversal. If not, than one star pushing on another should go same direction (away) just like our moon is held by gravity, but it’s slipping further away from us. In reverse gravity when an object is pushed, and it causes it to push back which is not “Normal” gravities behaviors.
Hubble watches neutron stars collide and explode to create black hole and 'birth atoms' | Live Science

Example 7 - Black Holes show gravity in reverse

If the absolute value of positive mass is bigger than that of negative mass, they will meet within finite time(attractive effect). Could this be black holes, and could they grow larger by the negative mass it collects? Is the reason some black holes have the arch going up opposite of the accretion disk, having to do with negative mass as shown create/moved in upward trajectories, against gravity? Luttinger observed that negative-mass objects would gravitationally repel all objects of any mass (positive or negative), while positive-mass objects would gravitationally attract all objects of any mass. Yet when we obverse the motions, we see the black hole push, and instead of following Newton’s Laws, we observe they are in reverse.

Example 8 – Light forms new negative mass particles.

The University of Rochester researchers say they've developed a device that can create particles exhibiting negative mass, by combining photons from laser light and excitons in a semiconductor. Normally, light is bounced between a pair of mirrors facing each other, and the space where that light is confined is called the optical cavity, or microcavity. In this device's optical microcavity, the team placed an atomically-thin semiconductor made of molybdenum Di selenide, where it could interact with the confined light. Excitons in the semiconductor combined with photons in the confined laser light to form new particles called polaritons, which have negative mass.
Negative mass particles forged in new laser device

0 Comments
2024/11/19
18:42 UTC

11

Will we ever find direct evidence of dark matter?

Dark matter makes up a huge part of the universe, but we’ve never seen it directly. Scientists are searching through detectors, space observations, and experiments like the Large Hadron Collider—but so far, no luck.

Do you think we’ll ever find it, or is it a mystery we’ll never solve?

10 Comments
2024/11/18
12:24 UTC

6

These are 6 of the most promising space-related LEGO models currently up for voting on LEGO IDEAS (by different fan designers - see first comment). A model needs 10,000 supporters for the chance of becoming a real LEGO set.

1 Comment
2024/11/15
17:51 UTC

11

What happened before the Big Bang? Are the multiple or even infinite big bangs?

I doubt there was nothing before the Big Bang. I don’t think the concept of nothing actually exists; there was always something. Are there an infinite number of big bangs occurring all the time simultaneously?

9 Comments
2024/11/15
17:12 UTC

4

Help Interpret this Universe Alignment 🙏🏽

Yesterday turned out to be another busy day, as expected. Once I finally had some time to unwind and watch TV, I decided to slip into my pajamas and kept my socks on. As I settled down to relax, something unexpected happened: my partner's phone started showcasing photo suggestions, including wallpapers and other images. To our surprise, we stumbled upon a picture featuring me in the exact same pajamas and socks! It was taken in the same spot, a year ago to the day, and at the exact same time. This eerie coincidence really caught my attention and highlighted that day for me. It led me to ponder: why did the universe align in such a peculiar way, mirroring not just my attire but also the timing and location? What could this profound synchronization possibly mean?

Thank You in advance !!

2 Comments
2024/11/13
01:50 UTC

2

What is Time? | Zogg from Betelgeuse

0 Comments
2024/11/12
00:22 UTC

1

How do scientists predict time duration?

on what behalf scientists predict the year, as the Big Bang happened 13.8 Billion years ago and the earth is 4.6 Billion years ago..how do they do it?

5 Comments
2024/11/11
08:00 UTC

2

How possible and accurate is the Big bounce theory

How possible and accurate is the theory that will Form another big bang

0 Comments
2024/11/10
23:39 UTC

7

Simultaneity Across the Cosmos

Imagine intelligent life existing millions or even billions of light-years away, in some unfathomable corner of the cosmos. Now, picture a being in that distant place, contemplating the idea that we, too, exist.

This being envisions you and me, specifically. Perhaps it imagined us before we were born or long after we’ve passed away. But pause for a moment and consider that this being imagines our existence and, indeed, that we do exist.

In other words, two events occur simultaneously:

  1. The being imagines we exist.
  2. We exist.

The question is whether it is possible for two events in the universe to exist at the same time, regardless of the distance between them.

The question arises because I often think about the countless events unfolding across the universe.

Events like the collision of two planets, the extinction of alien civilizations, the suffering of other beings in the universe, the formation of a black hole, and so on.

So, I wondered: is it possible that at least one of these events is happening at this very moment— strange things unfolding every second?

It feels surreal to imagine all of this occurring while I’m here, simply going about my day-to-day life.

1 Comment
2024/11/09
03:41 UTC

3

Why does classical physics gravity formulas/measurements do not work at a quantum level, what’s missing?

So when we think about the laws of motion and the effects of gravity and it’s new counterpart “reverse gravity”, we know that the type of mass (positive or negative) directly affects the direction of gravities force. Positive mass creates “normal” gravity and pushes the object in the same direction of force (Newton’s Laws), while negative mass causes the reverse effects. While the mass determines the direction of gravities force, what would cause the strength of gravity?

Laws of gravitation say that object 1’s force affecting object 2 from center to center. While the measurement of strength could be determined based on distance between the two objects, it’s not the distance or the mass that determines the amount of gravities strength. Which is why these formulas/methods fail at the quantum level because gravity is weak and does NOT work this way. We think it works this way because we think in terms of matter and not what we can’t see. We must be missing something, but what? The question of why Newtonian Mechanics does not work at small scales and why we need to use quantum mechanics is not straightforward to answer.

Let me answer this for you simply.

We have to start at the simplest concept. Ask ourselves what causes gravity? Einstein showed us that what causes gravity is the displacement of space, not anything to do with matter per se. We may have visually thought in our mind that the object/matter was the cause of displacement, but it’s not which is why none of the formulas work, so it must be wrong. So what is it exactly other than mass or matter that could be displacing space? What does space contain? Since everything in our entire universe is energy, matter is energy, phono/ sonic sound is energy, photon/light is energy, electrical energy, kinetic energy, nuclear energy, ionization energy, mechanical energy (possibly), thermal energy, and chemical energy. In our universe we see roughly 20% of matter which is only a small part of the list we just reviewed. So what is the remaining part that’s not physical matter in our universe from this list that could also displace space? Electrical energy, photon/light is energy, kinetic energy, nuclear energy, ionization energy, thermal energy, chemical energy, sonic energy are what is remaining. These are all energies, so it’s the amount of energy in the object that is displacing space that determines the strength of gravity and nothing to do with mass or matter which is why Newton mechanics don't work for atoms and it turns out that quantum mechanics makes a good job of predicting energies. The key word is energies.

The more energy an object has, the stronger the gravity is regardless of which direction the force is applied in normal or reverse. One could also determine that the gravitational constant is based on amount of energy of the object and is proportional. When we look at a quark and the force of gravity holding it together is very weak, so at the quantum level gravity is very weak because it’s a small amount (size/quantity) of energy, and energy is proportional to gravities strength. When a force applied is stronger than gravities strength, the bond breaks or gravity fails to hold it together. This would fundamentally work at the quantum scale and classical physics at the same time. Has anyone considered that energies may be the key to making both classical physics and quantum physics work together in determining gravities strength and functional formulas that work at large scale and the quantum scale at the same time? Has this been worked as gravity formulas based on energy and not based on mass? Since Newton Laws clearly don’t work at all outside of large bodies and even then, it’s approximately close but not exact?

“Insanity is doing the same thing over and over expecting different results”.

1 Comment
2024/11/07
20:14 UTC

1

How possible to see the earliest and most distant galaxies?

I have heard documentaries saying we are seeing earlier and earlier galaxies closest to Big Bang. However I always wondering how this is possible considering nothing travel faster than light, and earth is not even formed yet when these galaxies are formed, so how can we see these galaxies? In other words, when these galaxies are formed, their "light" travel out and when these "lights" reaching where earth is now located in space, the problem is earth is not even formed yet! By the time earth is formed, the event (or "lights") should have long gone and we should not able to see them now. Am I missing something?

0 Comments
2024/11/06
16:43 UTC

1

Reminder that the Europa Clipper is likely already closer to mars than earth in angular diameter.

(Angular diameter doesn't mean the actual distance, it's an estimation i made), it means the size of the object from your position.

0 Comments
2024/11/03
17:52 UTC

6

Could Earth still support life if it were a rogue planet?

It might be possible for the earth to have life if it is in continuous free motion.

10 Comments
2024/10/30
20:52 UTC

6

Life will influence the universe the same way it did to Earth

I've been watching the JRE with Brian Cox. They were talking about how the idea of life being just a momentary flicker of meaning in the universe is false. Just look at how much we have done to Earth in a span of ~100/200 years. We had a real impact on the ecosystem and soon we will put a man on Mars. The idea is that what if we don't see meaning as a small chance in the universe but as something destined to be? Then we could not even tell the evolution of our universe unless we calculate in spacefaring civilizations that can manipulate stars, black holes, galaxies, and whatnot. You have to calculate life into the universe itself as you have to do the same for a planetary standpoint, like life changed the atmosphere a long time ago by introducing massive amounts of oxygen. We will do something like that to the universe too in the far future. Maybe this is the way of things, for life: single cell -> multicellular -> multiplanetary -> multi-solar -> multi-galactic -> universal(?). It is hard to think that humans represent the whole multiplanetary biology, but back in the time some bacteria had to be the first to evolve into multicellular... that bacteria or whatever was the first, and the only one for a time. Maybe on a grand scale, multiplanetary life will emerge out of humans, and over time we will evolve into different species that all have the capabilities of a multiplanetary species. The same way that over time there were not one but many multicellular organisms.

What are your thoughts on this?

7 Comments
2024/10/29
09:41 UTC

8

Are we experiencing multiple parallel realities at the same time?

If the universe is infinite, and if there are an infinite number of planets, and if there are an infinite number of worlds just like this one, and if there are an infinite number of parallel realities and versions of ourselves, is it possible that our perception of reality in this very moment is actually a combination of us bobbing between parallel realities? I’m not sure I believe this, but it’s an interesting idea. Perhaps our idea of now, and reality, is really more of a complex matrix of experiencing multiple versions of reality at the same time. Does anybody else think like this?

2 Comments
2024/10/27
14:56 UTC

93

Vayager 1 Pale blue dot

carl sagan : pale blue dot

4 Comments
2024/10/25
12:43 UTC

5

Cosmic indifference ?

Hey guys, I’m new here and uhm let me just say I so much love my experience so far on here , my mind has been racing , anyway not to talk you to death . I’ve really been mind fucking myself endlessly, Cosmic indifference? That's a pretty deep topic! It's like the universe just doesn't care about our little worries, right? I think it can be a bit freeing, knowing that we’re just a tiny part of a much bigger picture. What do you think?

4 Comments
2024/10/06
16:28 UTC

17

Galaxy Cluster Abell 370 and Beyond About 4 billion light-years away, the massive galaxy cluster Abell 370 is captured in this crisp snapshot from the Hubble Space Telescope. The galaxy cluster appears to be dominated by just two giant elliptical galaxies and dotted with faint arcs. ( See comments).

1 Comment
2024/10/03
23:00 UTC

2

Universe & Reality - PODCAST Alert

Hey Redditors!

I'm excited to share my new podcast, SpaceTime Chronicles, where we explore the mind-blowing wonders of the cosmos. 🚀

Here's what you can expect: Deep dives into fascinating topics: We tackle everything from the weirdness of quantum mechanics and the possibility of parallel universes to the mysteries of black holes and the origins of the universe itself. 🤯

0 Comments
2024/10/03
18:13 UTC

7

It's a bird? a plane? a moon? a planet? a star? a galaxy? a universe?...

As technology improves, we seem to discover greater objects.

In the early 1920s, Edwin Hubble who had access to the world most advanced telescope of the time ( the Hooker Telescope) discovered that what seemed to be a cloud of stars was actually a galaxy containing at least billions of stars.

Are we going to eventually observe another universe after we wrongly assume it to be a cluster of galaxies. This would most likely retire our idea of the big bang as a unique event... Let's see what the JWT is ready to reveal to us. 😎😉 To my fellow scientists, are we almost there?

4 Comments
2024/09/26
06:46 UTC

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