Did you know it rains on the Sun? Not water, of course. It's solar rain, which occurs in the Sun's corona, the outermost ...

Researchers have unveiled a new model for the universe’s birth that replaces cosmic inflation with gravitational waves as the ...

Oftentimes, we think of space as an endless, mostly empty vacuum, a silent backdrop where planets, stars, and galaxies play out their dance. We also think of time as something separate, a steady ...

In other words, the universe does not just evolve. It remembers. This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed ...

The Polaris Dawn crew Jared Isaacman, Scott "Kidd" Poteet, Sarah Gillis and Anna Menon explain the experiments conducted during the mission. Also, see a time-lapse of Isaacman's spacewalk. Credit: ...

OAKLAND, Calif. - A mysterious light streaking the Bay Area sky on Thursday night sparked the curiosity of those who witnessed it and those who are seeing the videos online. Was it a meteor? A piece ...

"If the model holds true, it could mark a new chapter in the way we think about the birth of the universe." A radical new theory regarding the origin of the universe suggests that gravitational waves, ...