/r/Astronomy

Photograph via snooOG

The amateur hobby of humanity since the dawn of time and scientific study of celestial objects.

Everything to do with Astronomy

General Rules

For sub rules, please visit the redesigned reddit page.

"Astronomy compels the soul to look upward, and leads us from this world to another."

"We are a way for the cosmos to know itself."

Answers to Common Questions

How do I Become an Astronomer/What do Astronomers Do?

What telescope/accessories should I buy?

What should I look for in the sky?

What Was That Bright Moving Object I Saw?

Where Can I Learn About Astronomy?

Can I Get Help With Homework?

Sister Sub-Reddits

/r/Astronomy

2,927,855 Subscribers

5

Solar Eclipse Art Print - April 8, 2024

0 Comments
2024/07/20
15:09 UTC

120

The Ring of Fire Eclipse, over Bryce Canyon [OC]

3 Comments
2024/07/20
11:13 UTC

0

Possible method for searching for the origin of the WOW signal?

Many theorize the last few decimals of the 1420.3556 Mhz frequency of the WOW signal could match with a planet traveling towards us in it's orbit around it's home star and blue shifting the signal slightly while transmitting.

Could it be possible to compile the mass of every star within the scope of the two big ears.

Then calculate the speed at which a planet would have to be moving to cause a shift of .3556.

Then match that with the habitable zone of each of those compiled stars.

And see what stars allow for a planet to reside in the habitable zone and can maintain that orbital speed.

Then search those stars to look for planets and create a list.

Narrowing it down by the habitability of the planet itself using Spectrographs

The spectograph process would likely take immense resources, but if we theoretically had more telescopes in the future this might be feasible.

3 Comments
2024/07/20
06:21 UTC

283

Yesterday's almost full Mineral Moon

3 Comments
2024/07/19
18:03 UTC

278

The Great American Eclipse [OC]

5 Comments
2024/07/19
13:58 UTC

18

What would sunsets look like around different star types?

I have always wondered what a sunset would look like around different types of stars. I have tried to do some research into the types of light refraction, but I cannot find any answers anywhere, and many of the information I can gather is... Less than conclusive, to say the least.

In order to put this question to rest, and to provide any people with similar questions with an answer, I have come to consult the experts.

What would a sunset look like around various stars (Assuming, say, a blue star wouldn't strip away our atmosphere near-instantly)?

I would like to know the answers to an Orange (Class M), White (Class F or A), and radiant Blue (Class O). Once again, this assumes that all environmental conditions (Atmosphere, stellar position, etc.) remain identical, the planet will remain 50/50 with the cast light, and there will be no fallout from Sol turning into a blue supergiant. Please disregard any extinction-level events in your reply, I want to know how the sunset would look.

7 Comments
2024/07/19
10:28 UTC

47

Chicagoland, get out tonight!

Gonna be optimal viewing tonight! I know the moon is a little bright early, but if you’re a late nighter, should be a great night for viewing!

3 Comments
2024/07/18
23:33 UTC

137

The galaxy and the gear

Shooting the milkyway while my gear shoots the dark Shark.

1 Comment
2024/07/18
16:14 UTC

0

NASA’s Asteroid Simulation Alarms Internet

7 Comments
2024/07/18
14:26 UTC

4

Not sure where else to ask this: can the “Dark Universe” show from the Hayden Planetarium (short film) be seen, watched, or purchased anywhere?

I think I saw it there at the Planetarium around 8 years ago. I don’t think it shows there anymore. I imagine you can buy a copy at their gift shop? Maybe I should call them. I was wondering if it streams online?

4 Comments
2024/07/18
12:39 UTC

274

The ISS and the Sun [OC]

7 Comments
2024/07/18
11:30 UTC

8

Raspberry Pi as CCD

I’ve seen a lot of astronomy software that shows a constantly refreshing preview from a (normally usb) camera, normally at a rate of one new frame every 1-30 seconds. It appears to be configurable in the UI. No idea what any of them are called unfortunately.

I have a Pi HQ camera with the IR filter removed and whilst I’m not expecting miracles with sensitivity, I wanted to try using this as a CCD for my telescope.

I’d like to ask if there is a software stack that would support this kind of behaviour, using either the pi as the ui or a separate computer.

1 Comment
2024/07/18
08:28 UTC

106

NGC7000 in Cygnus

3 Comments
2024/07/18
06:15 UTC

1

Question about what I can see

I haven’t been able to find some DSO I’ve been looking for, such as the whirlpool galaxy and the North American Nebula. Im not sure if it is user error, or if I simply am not able to see them.

I have a 700mm focal length refractor, with a 102mm (4”) Aperture. I typically observe in a Bortle 5 area.

What can I expect to see? Can I even see DSO or do I need to go somewhere with darker skies? Thanks!

4 Comments
2024/07/18
00:09 UTC

1,502

I’m pretty proud of this

27 Comments
2024/07/17
22:32 UTC

0

I’m using a 10x50 binoculars right now watching the moon, and I can see a light pulsating inside a crater. The big middle crater on the left, in the middle. Can someone look at it with a telescope?

Idk maybe it’s just something normal but I can’t see more since I have just a 10x50 thank u!

19 Comments
2024/07/17
21:05 UTC

169

I heard the meteorite over NYC

I live in the NY area and yesterday morning while sitting on my porch I heard this sort of sonic boom, super loud but no where near hurt your ears loud. It sounded like the back of a 100 airplanes but far away. I kind of just calmly sat there waiting to feel the wind or see the blast of a nuke. It was so damn loud and across the entire sky. I forgot about it until I saw it on the news today, super cool experience!

23 Comments
2024/07/17
19:14 UTC

1

Gravity is a weak force, but can this be beaten?

Given that gravity is a weak force and on earth electro magnetism can overcome it, could a strong enough electro magnet pull something from beyond a black hole event horizon? Theoretically?

48 Comments
2024/07/17
18:37 UTC

64

200 in Mount Palomar telescope. Perhaps the most iconic. The first mirror attempt cracked

The first attempted casting of the 200-inch mirror failed in 1934. It has been displayed in the Corning Glass museum for 60 years plus

It took at least a year for the second mirror to cool

I visited this in 1972 after hurricane Agnes flooded the museum. There was dirt and residue halfway up this cracked mirror.

11 Comments
2024/07/17
18:19 UTC

187

Cat's Eye Nebula

5 Comments
2024/07/17
17:41 UTC

16

Can any mineral or gemstone be found in a meteorite?

Theoretically speaking is it possible for any mineral or gemstone to appear in a meteorite. For instance Painite one of the rarest gemstones on earth. I’m not speaking with regard to whether they all have in reality appeared in meteors that we’ve found, i’m sure that’s not the case. But theoretically speaking is it possible, even if extremely unlikely

20 Comments
2024/07/17
16:56 UTC

231

The Witchhead Nebula [OC]

1 Comment
2024/07/17
11:26 UTC

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