Add Yahoo as a preferred source to see more of our stories on Google. Skywatchers have several celestial treats in store this summer, and June does not disappoint as the kick-off month. We're already ...

A stock illustration of an asteroid near Earth. Astronomers believe our "mini-moon" originated from the Arjuna asteroid belt. SCIEPRO via Getty Images After almost two months of companionship, Earth ...

Earth has adopted a new(ish) traveling companion. It’s a tiny asteroid with quasi-moon status, named 2025 PN7 by astronomers. Not to be mistaken with a mini-moon, the celestial object follows an orbit ...

Exoplanets are planets that orbit stars other than the sun and thus exist outside the solar system. The word "exoplanet" ...

Beginning Sunday, Earth's skies will soon have a temporary visitor. On September 29, an asteroid dubbed 2024 PT5 will become a "mini-moon" of sorts, temporarily entering Earth's orbit for almost two ...

A new study presents a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are 1 to 4 times the size of Earth and among the most common in our galaxy. Using ...

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and planetary masses silently orbit their stars—sometimes thousands of astronomical ...