Galaxies are astronomical objects composed of billions or even trillions of stars. Our Earth and solar system are just a tiny ...

When is the next leap year? Here are some fascinating leap year facts, along with all the details about why leap day always falls on Feb. 29.

The Gaia mission, launched by the European Space Agency, has completed a decade of groundbreaking astronomical observations, collecting over three trillion data points on two billion stars and ...

The new moon of January will be at 7:36 a.m. Eastern Time on Jan. 29, according to the U.S. Naval Observatory, and two days ...