Astronomers discovered a "quasi-satellite" of Earth, also known as a "quasi-moon," dubbed 2025 PN7 in 2025. NASA told Snopes ...

Astronomers have confirmed a Saturn-size world drifting alone in deep space roughly 10,000 light-years from Earth, a discovery that turns a once-theoretical idea into a measured reality. The planet ...

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Thanks to the discovery of thousands of exoplanets to date, we know that planets bigger than Earth but smaller than Neptune ...

Planets usually stay close to their host stars, tracing steady paths shaped by gravity. Yet some planets break free and drift ...

Rogue planets — worlds that drift through space alone without a star — largely remain a mystery to scientists. Now, ...

Comet 3I/ATLAS, the third interstellar object ever detected, reached its closest point to Earth overnight from Thursday to Friday (Dec. 18 to 19), and it remains in a good viewing position tonight.

Eager skywatchers will soon have front-row seats to a rare cosmic encounter as interstellar comet 3I/ATLAS makes its closest approach to Earth, and you can watch it happen live online tonight! The ...

TRAPPIST-1e, an Earth-sized world in the system’s habitable zone, is drawing scientific attention as researchers hunt for signs of an atmosphere—and potentially life-supporting conditions. Early James ...