r/askastronomy • • Feb 06 '24

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

Post image
279 Upvotes

r/askastronomy • • 1h ago

What did I see? What is this in sky?

Thumbnail gallery
• Upvotes

r/askastronomy • • 8h ago

Astronomy If you could observe any object in the universe tonight, what would it be?

Post image
32 Upvotes

r/askastronomy • • 2m ago

Astronomy First time photographing the sky!

Thumbnail gallery
• Upvotes

I just updated my iPhone 11 Pro Max to an iPhone 18 Pro and got the sudden urge to photograph a beautiful Danish night sky last week…

It’s so cool that this is possible with just a phone! Now I feel like investing in a telescope 🔭

Anyway, I know that I captured the Andromeda and Triangulum galaxies and part of the Milky Way. Probably also a whole lot more that I am currently unaware of 😀

My question:
When post-processing images of the sky, how do you know what gives the most accurate, true-to-life results? -are there any right or wrong color temperatures for astro-photos?


r/askastronomy • • 7h ago

Astrophysics We built a free Astrophysics Olympiad platform—here is our current 4.0/10 Daily Problem. Can you solve it?

0 Upvotes

For more problems like this and a measurable image for this problem, check the first comment!


r/askastronomy • • 4h ago

What did I see? Weird object I saw In the western night sky?

Thumbnail gallery
0 Upvotes

I saw a weird object in the western sky after I processed a 4 min exposure photo and Google kept saying it was the orion nebula which is impossible considering that it was below the horizon when the photo was taken at ~8:50 on the 21st of October. Here are the photos above. Also you can ask me anything about it.


r/askastronomy • • 1d ago

What did I see? Shooting star? Bolide?

24 Upvotes

I've seen a few shooting stars in my time but never something like this one. What really caught my attention was the lack of a streak left behind (as seen with naked eye) and the apparent change of direction, although that could've just be an optical illusion considering the slight turn on the road. Anyhow! it sure was pretty!


r/askastronomy • • 8h ago

What if we're not alone but will never know? (Long)

0 Upvotes

Sometimes I think about the universe so much that I can't sleep. Tonight is one of those nights.

It's 3:09 in the morning. I'm lying in bed, staring at the ceiling, and my mind keeps circling around three ideas that seem separate at first, but the more I think about them, the more they connect. And the deeper I go, the harder it becomes to wrap my head around the reality we exist in.

1. There are parts of the universe we may never see.

The universe is expanding, and some distant regions are receding from us so quickly that light emitted from them today may never reach us. Not because those places don't exist. Not because there's nothing there. But because the space between us is expanding in a way that may permanently separate us.

Think about what that actually means.

There could be entire galaxies filled with stars, planets, oceans, and perhaps civilizations looking up at their own night skies, wondering the exact same things we are. They could be asking whether they're alone in the universe. They could be developing technology, discovering physics, searching for life.

And we might never know they exist.

Not because they're dead. Not because they've disappeared. But because the universe itself may have placed them beyond the reach of any information we could ever receive.

There could be an entire reality unfolding beyond our ability to witness it.

And we wouldn't even know what we were missing.

2. Every time we look into space, we're looking into the past.

The light from the Moon takes about 1.3 seconds to reach us. The light from the Sun takes about eight minutes. When we look at Andromeda, we're seeing it as it was approximately 2.5 million years ago.

We're not looking at the universe as it exists right now. We're looking at the information the universe has sent us, sometimes across billions of years.

Imagine a civilization in Andromeda developing a telescope powerful enough to observe Earth. The light reaching them today would show them a version of Earth from roughly 2.5 million years ago. They wouldn't see our cities, our technology, or our modern civilization. They'd see an ancient Earth, populated by our distant ancestors.

Meanwhile, we could be looking at their galaxy at the exact same moment, seeing a version of their world from millions of years in their past.

Both realities could be unfolding simultaneously, yet neither civilization would be witnessing the other as it currently exists.

And that makes me wonder: how much of what exists right now will never be seen by anyone? How many stars have already died whose light hasn't reached us? How many planets have formed, changed, or been destroyed while their light is still traveling through space?

The universe has a history that we can observe, but we can never experience all of it at once.

We're surrounded by evidence of what was, trying to understand what is.

3. What if we're not alone, but the universe makes it impossible for us to find out?

This is the thought that really gets me.

We search for extraterrestrial life, but we tend to imagine discovery as a matter of building a powerful enough telescope, developing faster spacecraft, or listening carefully enough for the right signal.

But what if the problem isn't simply that we haven't looked hard enough?

What if distance and time are fundamental barriers that no amount of technological progress can overcome?

Suppose a civilization exists on a planet in Andromeda right now. Suppose they've evolved, developed intelligence, built cities, discovered mathematics, and begun asking whether life exists beyond their world.

Perhaps they've been searching for millions of years. Perhaps they've sent signals into space. Perhaps they've looked at our galaxy and wondered whether any of those distant stars host life.

But the light we're receiving from their galaxy began its journey millions of years ago. And any signal we send today would take another 2.5 million years to arrive.

Even if we discovered undeniable evidence of their existence tomorrow, we wouldn't be discovering who they are today. We'd be discovering who they were millions of years ago.

They could have advanced far beyond anything we can imagine.

They could have gone extinct.

They could have never existed in the first place by the time our information reaches them.

We might discover a civilization's ancient history without ever knowing whether anyone is still there to tell it.

And that's assuming communication is possible at all.

Now put those three thoughts together.

There may be civilizations we can never observe because the expansion of space permanently separates us.

There may be civilizations whose existence we could eventually discover, but only through light that left their planets millions or billions of years ago.

And there may be civilizations so distant that, even if we knew they existed, the time required to exchange a single message would make any meaningful conversation almost impossible.

Somewhere out there, life could be looking back at us. But depending on the distance, they might be seeing Earth before humans even existed. Or they might be beyond the point from which any information could ever reach us.

And we could be doing exactly the same thing to them.

We could be looking at the same universe, asking the same questions, yet forever separated by the very laws that make the universe what it is.

And then there's the possibility that none of this is special to us.

Earth is one planet orbiting one star in one galaxy. Our galaxy is one among an almost incomprehensible number of galaxies in the observable universe.

We exist for a tiny fraction of cosmic history. Our civilization has existed for an almost negligible amount of time compared with the age of the universe. Our ability to observe the cosmos is limited by the technology we've developed, the time we've been here, and the physical laws we can barely begin to understand.

We have no definitive evidence that intelligent life exists elsewhere. But we also haven't searched every star, every planet, or every possible way life might exist.

So what if we're alone?

And what if we're not?

Both possibilities are terrifying in completely different ways.

If we're alone, then perhaps consciousness is an extraordinarily rare event in a universe that may otherwise be indifferent to it. Perhaps, for all we know, the ability to look at the stars and wonder why we're here is something that has happened only once.

And if we're not alone, then there could be countless other forms of consciousness scattered across the cosmos, each experiencing its own little corner of reality, each wondering whether it's alone, and each potentially separated from the others by distances that make discovery impossible.

Perhaps the universe is full of life, but the universe is so vast that most life will never know about any of the rest.

Perhaps being alive isn't the rarest thing. Perhaps being able to find one another is.

And here's the thought I can't get away from tonight:

The universe doesn't seem to owe us answers.

It doesn't promise that everything that exists can be discovered. It doesn't promise that every question has an answer we'll ever be capable of knowing. It doesn't promise that the truth is within our reach simply because we're curious enough to seek it.

There may be things that are real but permanently unknowable to us.

There may be events happening right now that no observer on Earth will ever witness.

There may be questions we can formulate but never answer, not because we're unintelligent, but because reality itself imposes limits on what we can know.

And the strangest part is that we're conscious beings inside this enormous system, capable of recognizing at least some of those limits.

We're pieces of the universe that somehow evolved the ability to question the universe.

Matter that became aware of itself.

A species on a small planet, staring into the darkness and trying to understand something vastly larger than itself.

I lie here thinking about all of this, and suddenly the ceiling above me feels almost irrelevant. The room, the house, the planet beneath me—all of it is real, all of it matters to us, yet it's such a tiny part of something so much larger that I struggle to comprehend it.

I don't know whether the universe is infinite. I don't know whether we're alone. I don't know how much of reality exists beyond what we can ever observe.

And maybe that's what keeps my mind going.

It's not that I think I can solve these questions tonight.

It's that I can finally begin to understand how enormous they really are.

Somewhere, right now, the universe is doing things we'll never witness. Somewhere, light is traveling toward places that may never receive it. Somewhere, there may be another mind looking into the darkness, asking whether anyone else is out there.

And we may never know.

Not tomorrow. Not in a thousand years. Maybe not ever.

So here I am, awake at 3:09 in the morning, on a planet spinning through space around an ordinary star, thinking about things so enormous that my brain can barely hold them.

And I keep coming back to one question:

What if the most unsettling thing about the universe isn't how much we don't know, but how much we might never be able to know?


r/askastronomy • • 21h ago

Issues with Celestron 8SE and GoTo Mount (Alt-Azm)

Thumbnail
0 Upvotes

r/askastronomy • • 1d ago

Sci-Fi I am developing 6dof space combat, flight and exploration sim, and need help from real astronomer.

2 Upvotes

My exploration scanning depends on orbital mechanics I already made and observation with probe/telescope.

I am making some prototypes but I have no idea how to balance it between being fun and being scientific enough to approach player to real astronomy.

I am also not sure what each instrument would show and how would data be interpreted in picture and numbers etc...

If anyone want to have talk and help, give some advices and brainstorm idea I would be deeply grateful and my DM or Discord are open.


r/askastronomy • • 2d ago

Did I capture anything special besides the Milky Way?

Thumbnail gallery
171 Upvotes

r/askastronomy • • 1d ago

Astronomy Class Membership- Royal Greenwich Museums

Thumbnail
0 Upvotes

r/askastronomy • • 1d ago

Astrophysics We built a free Astrophysics Olympiad platform—here is our current 2.9/10 Daily Problem. Can you solve it?

0 Upvotes

r/askastronomy • • 1d ago

Astronomy Two small planet candidates from public TESS data: is a journal paper the best route for an amateur?

2 Upvotes

I build software for a living. Astronomy is my hobby, and I'm pretty new to it.

I wrote a transit search and ran it on public TESS light curves of nearby K and M dwarfs.
Two signals came out of it: transits a few hundred parts per million deep, about 1.4 Earth radii each if they're on the target star. I tried to kill them in every way I could, yet they survived. Neither is validated.

And today I submitted one of them to JAAVSO to be peer-reviewed.

Is that the right road for an independent amateur, or is there a better way to get candidates like these in front of the people who do follow-up?

Thanks in advance!


r/askastronomy • • 1d ago

Any help identifying this object in the sky?

3 Upvotes

I did a time lapse video recording the night sky can someone please help me identify what can be seen moving in this video? There is also a yellow object


r/askastronomy • • 1d ago

Join me on our journey to the space exploration

Thumbnail m.youtube.com
1 Upvotes

r/askastronomy • • 3d ago

What did I see? What is this cluster of stars?

Thumbnail gallery
259 Upvotes

I keep seeing this cluster of stars whenever I go to look at Orion’s Belt I was just wondering what it’s called :D


r/askastronomy • • 1d ago

What can a spectrum tell us, from one star to an entire galaxy and the early Universe?

Thumbnail youtube.com
0 Upvotes

r/askastronomy • • 3d ago

Did I possibly capture Andromeda with my phone?

Post image
73 Upvotes

Was playing around with my phone’s night mode and used that one star app, which said that Andromeda was directly overhead. I did have a lot of artifacts and smudging, so I’m not entirely sure if that really is it. I live in a big town in NJ, so light pollution’s decently heavy here.


r/askastronomy • • 1d ago

What did I see? Is this a comet?

Thumbnail gallery
0 Upvotes

Saw this morning at 7:50am PST outside of Vancouver, facing eastward. It wasn’t really moving in the sky, just in one place. I googled it and it said there’s no comets today, I don’t know what else it could be? Sorry just a quick pic while I was driving to work and stopped at a light, I hope it’s clear enough.


r/askastronomy • • 2d ago

Astronomy How is it that we can only see Andromeda and no other galaxies at night?

17 Upvotes

r/askastronomy • • 1d ago

Astronomy What are the moving lights? They are not planes

0 Upvotes

this timelapse was shot in the middle of Nevada on October 8th of this year


r/askastronomy • • 2d ago

space jellyfish?

5 Upvotes

r/askastronomy • • 2d ago

Astronomy Is this image is considered apochromatic or apromatic lens? ( 80/900/25mm )

Thumbnail gallery
0 Upvotes

r/askastronomy • • 2d ago

What did I see? Wide-field sky photo

Post image
6 Upvotes

I was out last night around 8:30 - 9:00 PM and decided to take a photo facing roughly northeast because I knew that the Andromeda galaxy would be in that general area. I do think I found it in the photo, but I'm curious if I got any other note-worthy things that can be seen in there, or maybe even tiny galaxies that I missed.