Planets are born, and they can also "die." So what's the lifespan of a typical planet?

Look west just after sunset from this weekend for a chance to see some of six planets, though the best views will be had ...

Gas giants possibly developed slowly in the solar system. They developed cores layer by layer within a disk of ice and dust ...

By Will Dunham WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet ...

Since the 1990s, scientists have discovered approximately 6,100 planets outside our solar system, called exoplanets.

A closer look at the planets around a star called LHS 1903 may just flip our understanding of how planetary systems form.

Astronomers want to collect as much data as possible using as many systems as possible. Sometimes that requires coordination ...

General relativity helps explain the lack of planets around tight binary stars by driving orbital resonances that eject or destroy close-in worlds. This process naturally creates a “desert” of ...

Stargazers, get ready for a celestial show! A planetary alignment featuring six planets will be visible in late February and early March 2026. Here's how to see it.

A young star called V1298 Tau is giving astronomers a front-row seat to the birth of the galaxy’s most common planets. Four massive but extremely low-density worlds orbiting the star appear to be ...

Explore the visibility of Mercury, Venus, Jupiter and Saturn in February 2026. Discover observation dates, locations and details based on Space.com and NASA data.

Learn why only 14 out of over 6,000 exoplanets orbit two stars, and how Einstein’s general theory of relativity may be to blame.