Should we be worried about an asteroid apocalypse?
What can we learn from studying the sun?
Gravity shields - sci fi or sci fact?
Is Venus the only one...?
Any why do we have two tides a day?
How big can star systems get?
And how do know the colours of planets?
Could it spin forever?
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...
Once it's flung off into space, what actually happens to used spacecrafts?
Can you get green stars?
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?
How does Jupiter's moon Io get the energy needed to heat it up?
Why do new planets have such terrible names?
Is the frozen water on the Moon, Mars or anywhere else in space drinkable?
What will the Event Horizon Telescope see?
What's so special about the size of the Earth that makes life more likely?
Would a mirror lightyears away in space show us our planet's ancient history?
If an asteroid wiped out the dinosaurs, but birds are dinosaurs, what the heck is going on?