A rare lunar occultation, fading crescent moon, and an interstellar visitor make for a memorable week of stargazing in ...

Summer nights offer lots of interesting sights this month. Mercury and Mars are on show in the evening twilight. Both Uranus and Neptune stand near brighter beacons: Neptune and Saturn are two ...

We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

Sky This Week is brought to you in part by Celestron. Friday, July 4Mercury reaches its greatest eastern elongation (26°) from the Sun at 1 A.M. EDT this morning. You can view the tiny planet in the ...

It's possible that Mars' moons were originally asteroids that were captured by the planet's gravitational pull. There's also ...

The astronomers who operate powerful Vera C. Rubin observatory released debut images June 23, 2025, showcasing just exactly what the instrument can do ...

Close-up images of a region of Mars scientists had previously only seen from orbit have revealed “dramatic evidence” of where water once flowed on the Red Planet.

By Jack Guy, CNN (CNN) — A meteorite that is the largest known piece of Mars on Earth is expected to fetch up to $4 million when it goes up for auction later this month. Known as NWA 16788, the ...