The object orbits a brown dwarf that orbits a star, and astronomers aren’t sure if it’s a planet, a moon — or something else ...

A distant 'exomoon' the size of Jupiter is changing how we think about the cosmos.

For two nights, the moon will host a cosmic party with three planets – Mars, Saturn and Uranus – that will be visible in the ...

For two nights, the moon will host a cosmic party with three planets – Mars, Saturn and Uranus – that will be visible in ...

The Moon is gradually distancing itself from Earth, which has significant implications for our planet. Over millions of years ...

What planet is next to the moon tonight? Here's why Venus is shining like a star near the crescent moon and when to see the pairing this weekend.

For ages, astronomers have categorized the skies into tidy buckets: stars, planets, and moons. However, a new object 71 light years from us could completely disrupt that thinking.

A newly discovered object in a distant solar system doesn't fit neatly into the current definitions of moon or planet.

This visual journey imagines what Jupiter, Saturn, Uranus, Neptune, and Pluto would look like from the surfaces of their ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. The “planet parade” — mistakenly being called an alignment ...

Californians watching the sky in February have the chance to view a parade of planets and a snow moon. The planetary alignment that began in January will continue into February, according to ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. This week’s “planet parade” peaks on Wednesday, Aug. 20, as ...