Like how the Earth keeps the Moon bound on a gravitational tether, our nearest galactic neighbor, the Andromeda galaxy (M31), ...

The predawn hours of April 28 will see a planetary triangle form in the night sky, as Venus makes a close approach to Saturn following a conjunction, while Neptune, invisible to the naked eye, will ...

This gas needs an enormous amount of energy to shine — more than normal stars can supply. The discovery, based on data from ...

Spoiler warning: Below there will be information about today's New York Times Strands puzzle.