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.

HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

A dive into probabilities, asteroid impact modeling, and what sort of damage an approximately 180-foot asteroid could cause ...

Experts are tracking asteroid 2024 YR4, which has a 1.2% chance of impacting Earth in 2032. Observations continue to refine ...