Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

From conjunctions to the last blood moon eclipse in years, there will be many reasons to find a clear patch of sky.

Find out what's up in your night sky during January 2026 and how to see it in this Space.com stargazing guide.

Sky This Week is brought to you in part by Celestron. Friday, January 2The Moon officially reaches the Full phase early ...

Lineups of planets have often attracted attention for their supposed effects on human affairs—and for several days in early January, five solar system bodies are arranged in a n ...

While most planets that we are familiar with stick relatively close to their host star in a predictable orbit, some planets ...

Jupiter, as always, is a dazzling object, shining among the stars of Gemini the Twins. It reaches opposition on Jan. 10; this ...

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

Forty light-years away, seven Earth-sized planets orbit around a dim red dwarf star in one of the most tightly packed ...

The maneuvers will be undertaken by SpaceX, the owner of the largest satellite fleet in orbit. About 4,400 of the company’s ...

Bright full moons, dazzling meteor shower displays and remarkable total eclipses will give stargazers plenty of reasons to look to the sky in 2026. The new year kicks off with the full wolf moon on ...