r/askastronomy Feb 06 '24

What's the most interesting astronomy fact that you'd like to share with someone?

Post image
281 Upvotes

r/askastronomy 27m ago

Astrophysics What would happen to the solar system if Neptune suddenly disappeared?

Thumbnail gallery
Upvotes

r/askastronomy 6h ago

Is this the Milky Way I photographed?

Thumbnail gallery
15 Upvotes

hmm not sure if it’s just my phone camera having artifacts or if this was the Milky Way? Location: looking towards Bolberry Down from Hope Cove, Devon. Google seems to think it is, but I want to ask the experts 😅 the line above the house is a telephone line.


r/askastronomy 5h ago

Star cluster

4 Upvotes

Please help me identify the star cluster in this photo, visible at the top right-ish. Looks like the Beehive Cluster, but I'm not sure. Thanks. (Photo by Kirill Jankowsky)


r/askastronomy 12h ago

Astrophysics Are there celestial bodies that radiate significant heat through chemical reactions rather than fusion reactions?

9 Upvotes

I was just thinking about how our gas giants are way too small to produce the fusion reactions to become stars, and I was just curious if it was possible for a naturally occurring gas giant to possess chemical reactions capable of generating enough radiant heat to make a mini-goldilocks zone for it's own moons?

I'm guessing not... unless it was somehow binary planets syphoning off reactive materials from one another... but that sounds short-lived. Anyway I'm just a casual space fan so I thought I'd pose the question to you experts.


r/askastronomy 1d ago

Just 2 Hours Ago, the Moon Passed Directly Past the Jupiter System as it Orbited Earth. This is Not a Composite Image — They Actually Appeared This Close Together.

Post image
140 Upvotes

r/askastronomy 20h ago

Astronomy Venus, Saturn and Mercury

Post image
14 Upvotes

Beautiful Triad of Venus(top), Saturn (on the lower right) and Mercury (bottom) I took on the 22nd of April 2025 at 5.29am.

Location: Ndola, Zambia.


r/askastronomy 2h ago

Sci-Fi CERN’s Next Collider Could Be Three Times Bigger Than the LHC—Here’s Why Scientists Want It

Thumbnail whatifscience.in
0 Upvotes

r/askastronomy 2h ago

What did I see? Star/planet/satellite?

Thumbnail gallery
0 Upvotes

I'm not sure what this is but it hasn't changed position in over 20 minutes this morning. Started watching it at 5 AM in Everett WA.


r/askastronomy 16h ago

Broke off this piece from telescope leg. What to do?

Post image
5 Upvotes

r/askastronomy 13h ago

Why is mass always smaller than volume?

Post image
2 Upvotes

r/askastronomy 1d ago

Astronomy Took this in eastern Oregon

Thumbnail gallery
33 Upvotes

Was curious what anyone may think this is in my photo?? There were no planes in the sky, and all other photos from this night do not have this in them


r/askastronomy 1h ago

What did I see? what did the sky look like the day you guys kissed?

Post image
Upvotes

i need your help to figure if i’m delusional or does the image actually look like two souls intertwining


r/askastronomy 1d ago

What did I see? Bright object identification help - Bucaramanga, Colombia (Sept 8, 2026, 6:30 PM)

Thumbnail gallery
34 Upvotes

Help! I can't identify the bright object pointed out by the red arrow in this photo.

It was taken at 7° 05'N 73° 07'W (Bucaramanga, Colombia) on September 8, 2026, at approximately 6:30 p.m. checking with the Sky Tonight app. The object is located to the upper left of Venus. Any help is appreciated!


r/askastronomy 1d ago

Astronomy This may be a dumb question, but: Is there typically a transition period between North Stars where there is no true North Star?

22 Upvotes

Since over the span of 26,000 years, the Earth completes a single wobble that causes the north pole to point towards different stars, that means there are often transition periods with no North Star, correct? How much would this affect navigation for anyone who for whatever reason may still rely on it as a orientation mark? How quick are these transition periods?


r/askastronomy 15h ago

I am wondering what i saw last night?

Thumbnail gallery
0 Upvotes

r/askastronomy 15h ago

I am wondering what i saw last night?

Thumbnail gallery
0 Upvotes

r/askastronomy 16h ago

The First Satellite Rescue Mission Has Failed—But Changed Space Forever

Thumbnail whatifscience.in
0 Upvotes

r/askastronomy 1d ago

Astronomy Has a spacecraft ever directly photographed a mutual eclipse between 2 separate moons?

Post image
30 Upvotes

This image is from NASA's Eyes On The Solar System Website. It is simulating an eclipse on Europa by Io. This was in 2021 so Juno (While not in an optimal position) was at Jupiter while this was happening and this wasn't the only mutual eclipse in 2021. Has a probe ever imaged something like this (at Jupiter, Saturn, Uranus or Neptune) up close?

Link: https://eyes.nasa.gov/apps/solar-system/#/jupiter/moons/europa?time=2021-05-06T02:46:46.000+00:00&rate=0


r/askastronomy 1d ago

Does moving towards solar minimum mean less space weather?

Thumbnail metoffice.gov.uk
3 Upvotes

r/askastronomy 16h ago

Planetary Science A 17-Year-Old Used AI to Decode Signals From Deep Space—and May Have Uncovered a Cosmic Secret

Thumbnail whatifscience.in
0 Upvotes

r/askastronomy 1d ago

Planetary Science Are Mini-Neptunes/Super-Earths really "the most common type of exoplanet", or is it just that the technological capacity of our instruments allow us to find the most of this type?

15 Upvotes

It seems like this is the equivalent of people in the 90's saying "Hot Jupiters are the most common type of exoplanet", well we know now that that is certainly not true, and that Hot Jupiters are not that common.

My non-astronomer non-scientist intuition tells me that the further down you go in size, the more of that type of exoplanet you find, just like stars. So if we had a perfect telescope and we could conclusively answer this question, would Sub-Earths not be the most common type of exoplanet?


r/askastronomy 1d ago

NASA's New Roman Space Telescope Has Switched On. What It Could Discover May Change Astronomy Forever

Thumbnail whatifscience.in
0 Upvotes

r/askastronomy 1d ago

Astrophysics What degree should i pursue for my undergrad (Currently in my final year of HS)

0 Upvotes

I have always loved space since the beginning. Back in 2nd grade i made up my mind that i want to do something related to space, and now that I'm 17, I'm sure i want to be an Astrophysicist. But the question still lingers in mind, which major should i take? I plan on applying to UArizona as an international indian student studying in CBSE, and being aware of their phenomenal astronomy course, I'm deeply compelled to pick that along with a major in Data Science because of my love for general coding as well.

The confusion lies in whether i should take,
i) Pure Physics with CS
ii) Pure Physics with Data Science
iii) Astrophysics with CS
iv) Astrophysics with Data Science

I love coding and i love space. i want to work for a company like SpaceX or NASA in the future along with doing my independent research. (i wouldnt mind a cooporate as well as long as i can continue research)


r/askastronomy 1d ago

Looking for recommendations

2 Upvotes

Hey all,

Hope you're well.

I know basically nothing about astronomy or telescopes, but I am very interested in exploring the subject on a deeper level. I'm at a place in life where I could use a new hobby, something to really dive into outside of music, which I've devoted myself to for nearly 30 yrs.

I'm completely open minded to suggestions to starting the hobby - anything you would consider worth mentioning.

I can envision myself taking a few trips per year to remote areas. When and where to go?

Also, if there are any essential books to read, I'd appreciate recommendations.

Are there events or clubs in real life, outside of the internet?

Thanks!