Do you know any cool facts about space?

Question: Do you know any cool facts about space?
- Keywords:
  fun fact,
  space
Asked by anon-292699 on 22 Apr 2021.
- Steve Briddon answered on 22 Apr 2021:
  
  I’m not a space scientist and some of the things that I learn about it makes my head hurt. For instance, light takes so long to travel from the stars to your eyes, that when you see them in the night sky you might be looking back in time hundreds of years and seeing the star as it was then. In fact, some of them might not even be there any more!
- Neil Guthrie answered on 22 Apr 2021:
  
  Space definitely isn’t my area but I am fascinated by it! One of my favourite facts about space is that there is more stars in space, than there are grains of sand on Earth. That’s a lot of stars!
- Ed Peake answered on 22 Apr 2021:
  
  1. Were probably not alone in space (see the drake equation for calculating the likelihood of extraterrestrial civilizations).
  2. Normal matter ‘atoms’ that make up the universe we see only accounts for 5% of everything in the universe, the rest is dark matter and dark energy. If you can work out what it is you’ll defiantly get a nobel prize.
  3. Scientist aren’t quite sure how the universe will end, it could just float apart or get pulled together in a ‘big crunch’. But don’t worry its not going to happen for another 15 billion years.
- Rosie Goodburn answered on 22 Apr 2021:
  
  I find neutron stars really interesting! They’re born out of a core-collapse supernova star explosion and can spin 600 times per second because of their physics! They are the densest and tiniest stars in the known universe: They have a radius of about 10 km but a mass a few times the size of the Sun!
- Kip Heath answered on 22 Apr 2021:
  
  Space isn’t my area but I find it fascinating! Because there is no resistance in a vacuum, if you start an object moving then it will never stop in space. Unless it hits something.
- Ross Low answered on 23 Apr 2021:
  
  Not really about space but I do know that if you dehydrate (suck out the water) Tardigrades (microscopic animals), they can survive in the vacuum of space. They’re the only animal to be able to do that!
- Michael Capeness answered on 26 Apr 2021:
  
  Due to the thin atmosphere on Mars, if you’re standing up your feet will be at 25°C and your head will be at 0°C. So always wear a hat 😀
  
  Bonus fact: On Neptune, it rains diamonds.

Question: Do you know any cool facts about space?

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