And how do they form?
Why is there so much distance between them?
Dark matter exists all throughout the universe...right?
It's difficult to look into the sun or visit this giant ball of fire, so how do we know that it rotates on its own...
Jupiter is referred to as a gas giant, does this mean it is gas all the whole way through, and you could fly through it?
Cosmology and symmetry go hand in hand. If there are black holes, are there such things as white holes as well?
When on the moon, astronauts have many things to contend with, not least temperature and space debris.
What are the stats for accidents involving space crafts? How does landing compare to launch in terms of safety?
I've heard that muscles can waste in space because of decreased gravity. Does that mean astronauts return to Earth...
How much energy is in moonlight, and could solar panel technology be used to capture this energy?
I know there have been many missions to the moon and it's incredible to think humans have walked on its surface!...
What will the Event Horizon Telescope see?
What's so special about the size of the Earth that makes life more likely?
How do we get back to earth from the moon?
Seeing as Earth is just right for life, does that make hunting for ET futile?
Can we make gravity by spinning a spaceship?
Theoretically, there many be many universes but why do we think this?