The status of Pluto not withstanding, our solar system has 8 planets, but one astronomer believes we used to have a ninth ...

A TEAM of astrophysicists have made a bombshell scientific discovery after detecting a radio signal coming from beyond the ...

Planets without stars to orbit raise important questions about how planets evolve and what habitability might look like ...

See Venus, Jupiter, Mars, Mercury and Saturn light up September's sky before the Harvest Moon peaks on Sept. 26. No telescope ...

In the search for extraterrestrial life, it makes sense to first look for rocky planets with an atmosphere, like Earth.

Story excerpt: Three infant galaxies already contained disturbed, metal-rich gas, showing that cosmic chemical recycling ...

NASA’s Nancy Grace Roman Space Telescope launched on Aug. 30, 2026, beginning a journey that will take it about a million ...

Thousands of planets have been discovered beyond our solar system, offering clues to where life might thrive and whether ...

Add Yahoo as a preferred source to see more of our stories on Google. Stargazers who have heard of an amazing planetary alignment coming later in January may be in for a letdown if they look up at the ...

This week, five planets—Venus, Jupiter, Mars, Mercury, and Saturn—are visible at various times, all leading up to the full moon on September 26. They're known as the "naked eye planets" because they ...