Okay so, hear me out: fun facts about space is the weirdest, most bonkers, absolutely chaotic thing we kinda understand. And by “understand,” I mean we pretend we get it, but most of us still imagine aliens as little green dudes with attitude problems.
And yes, I have googled “how big is the universe” at 2 AM while eating leftover pizza and spiraling. Haven’t we all?
So buckle up, friend. I gathered 25 fun facts about space that aren’t just “the Sun is hot” or “there are stars.” No. These are the kind of facts that make you stop mid-bite and go, “Wait, WHAT?” (and maybe question your entire existence just a little).
Let’s get weird.
1. Space smells like seared steak
Yeah. Apparently, astronauts coming back from spacewalks say their suits smell like hot metal, welding fumes, or burnt steak. Like… cosmic BBQ?
Someone get Gordon Ramsay on a rocket, please.

2. You can cry in space—but your tears won’t fall
Because, you know, no gravity. Your tears just gather into floaty little blobs around your eyeballs until you look like you’re about to star in a low-budget sci-fi horror movie.
Sad, soggy astronauts. Floating emotion.
3. Space is completely silent
If you screamed in space, nobody would hear you. Not because they’re ignoring you (which would be fair if you keep screaming), but because there’s no air to carry sound.
Honestly, this feels like the perfect place to avoid small talk at parties.
4. One day on Venus is longer than its year
So like, you could literally wake up, do your whole morning routine, fight with your coffee machine, and by the time one day passes… a whole year has gone by.
Venus: the drama queen of the solar system.
5. Neutron stars are terrifyingly dense
Like, one sugar-cube-sized piece of neutron star would weigh 4 billion tons.
That’s heavier than all your ex’s emotional baggage combined.
6. There’s a floating water reservoir in space
And it’s got 140 trillion times more water than Earth. Just… chillin’ in a cloud near a black hole. Like it’s no big deal.
So next time someone says, “There’s no water,” you can be like, “Actually…”
7. The moon is moving away from us—slowly breaking up with Earth
It drifts away about 1.5 inches per year. Which doesn’t sound like much, but give it a few million years and we’re looking at a real “it’s not you, it’s me” situation.
8. You get taller in space
Gravity compresses your spine on Earth. But in space? Freedom! Astronauts grow up to 2 inches taller during missions.
So technically, space is like a free chiropractic appointment.
9. The biggest volcano in the solar system is on Mars
Olympus Mons is three times the height of Mount Everest. If aliens live there, I hope they get good hiking boots and snacks.
10. Jupiter’s moon Europa might have alien fishies
Europa has a salty ocean beneath its icy crust. Like, a full-on alien ocean. NASA’s kinda obsessed with poking around there.
Which I get. If I had an alien pond in my backyard, I’d definitely throw in a camera.
11. The largest known star could swallow our entire solar system
UY Scuti. Sounds like a sneeze. But it’s massive. If it were plopped into our solar system, it’d reach past Saturn.
Stars: not just shiny dots. Giant flaming gods of chaos.
12. We found a planet that rains glass sideways
HD 189733b (yeah, catchy name) has winds over 5,400 mph and literal shards of glass whipping sideways. Like a cosmic blender.
Hard pass on vacationing there.
13. The Sun makes up 99.8% of our solar system’s mass
Basically, the Sun is the main character. Everything else? Just side quests.
14. Saturn’s density is so low it could float in water
If you had a massive enough bathtub, Saturn would bob like a big, stripy beach ball.
Someone call MythBusters.
15. We’ve mapped less of the ocean than the moon
Let that sink in (pun intended). We know more about our distant, dusty space rock than the thing we’re literally living on top of.
16. A day on Mercury is 1,408 hours long
That’s 58 Earth days. Imagine forgetting your alarm—for two months.
17. Some stars are technically zombies
They’re called white dwarfs. Dead stars that still glow. Like celestial ghosts haunting space.
Weird, poetic, and a little emo.
18. There’s a “diamond planet”
55 Cancri e is a planet that might literally be made of diamond.
Meanwhile, I can’t even afford gas this week.
19. There’s a place in space that’s colder than the cosmic background
It’s called the Boomerang Nebula, and it’s colder than outer space itself. Absolute zero is -459.67°F. This sucker? -457°F.
Science is just showing off now.
20. The Milky Way is on a collision course with another galaxy
Andromeda’s heading our way. But chill—we’ve got like 4 billion years. Set a calendar reminder, maybe.
21. Your weight changes depending where you are in space
On the Moon, you’d weigh about 16.5% of your Earth weight. So a 150-pound person would weigh just 25 pounds.
Moon diet, anyone?
22. Astronauts’ hearts become more spherical in space
Yup. Less gravity means the heart doesn’t work as hard to pump blood, so it rounds out.
Space: turning hearts into basketballs since forever.
23. Space tourism is now a thing
People with Bezos-level money are already going. You might not be able to afford rent, but hey—space Uber exists.
24. We’ve got space junk orbiting Earth—lots of it
Thousands of broken satellites and random screws are just… floating up there. Basically, Earth has a cosmic hoarder problem.

25. There are more trees on Earth than stars in the Milky Way
Seriously. Around 3 trillion trees vs. 100–400 billion stars.
So next time someone says, “Reach for the stars,” maybe say, “Can I just hug a tree instead?”
Final Thoughts (or whatever this part is called) of fun facts about space
I don’t know about you, but after reading these fun facts about space, I feel like my brain’s been on a cosmic rollercoaster. One minute we’re talking diamond planets, the next it’s raining glass sideways, and somehow steak-smelling space suits are part of it.
Makes everyday problems feel kinda small, right?
Like, maybe my email inbox isn’t the scariest black hole out there.
So yeah, space is wild. And beautiful. And totally bananas.
Wanna go there someday? Or maybe just keep bingeing space documentaries like the rest of us. Either way—hope these facts messed with your head in the best way.
Catch ya in another galaxy. Or at the grocery store. Who knows?
Cool Extras (You Know You Wanna Click)
- NASA’s “What Did Hubble See on Your Birthday?” tool — Get weirdly emotional about a star photo.
- Wait But Why’s post on the Fermi Paradox — One of the funniest and smartest deep dives into “where are the aliens?”