Some think it could be an extraterrestrial spacecraft — but is it?
When the UAE president announced that his country would make a satellite to study Mars' atmosphere in unparalleled detail, he set an unprecedented goal for the Arab world.
It's been a great, enormous storm for more than a 100 years. But will Jupiter's Great Red Spot last much longer?
Alexei Leonov was the first person to leave the relative safety of his spacecraft and experience the silence of space.
There used to be nine planets. Now there are eight, or maybe there are nine after all. Whichever you prefer, here is a list of them in the order they appear in the solar system.
The forces and interactions we see and experience every day seem infinite. But they all stem from just four fundamental forces of nature.
If you could journey through the cosmos' most monstrous objects, what tales — if any — would you be able to tell?
Scott Kelly clocked 340 consecutive days in space and 520 days in space total during his career as a NASA astronaut.
Elon Musk is an entrepreneur best known in space circles for launching SpaceX, the first private company to ship cargo to the International Space Station.