Discovered by volunteer scientists, this alien planet is out of synch with its siblings ...

At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the ...

"The combination of extreme disk size, strong asymmetries, winds, and potential planet formation makes it the perfect ...

Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...

The coldest and densest molecular gas clouds in the interstellar medium can have temperatures of 10 K (-505 °F/-263 °C), ...