"An epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey ...

An curved arrow pointing right. Space is so unfathomably large and so unbelievably weird, that it can sometimes be difficult to convey basic facts. For example, you can fit all of our solar system ...

Sound as we know it does not exist in space. That’s because, on Earth, sound mainly travels to our ears via vibrating air molecules. Because space is a vacuum, meaning there is no matter at all ...

Gray wrote for Scientific American. If you're in total darkness at the coldest spot in the known universe, the vacuum of space can get down to -454 degrees Fahrenheit. Brr! But in sunlight near ...

A neutron star’s density is mind-boggling. These stars are composed almost entirely of neutrons packed together in a tiny radius. Just a teaspoonful of this material would weigh over a trillion ...

The Netflix K-drama 'When the Stars Gossip' might have you asking questions about space travel, microgravity and what it's like to be an astronaut. Here are some answers.

Argonaut is designed to deliver supplies, infrastructure and payloads to the moon. It could survive for five years on the ...

"We're really talking about something which is, in the long term, like rebuilding the internet in space," Musk said during a speech in Seattle when revealing the project. SpaceX's satellite ...

There's a lot hiding in the universe's dark corners. Interstellar dust clouds and inky stretches of deep space can appear dull to ordinary telescopes. But to a car-size telescope 26 million miles ...