Researchers are discussing 2025 PN7, a small celestial body that's following a similar orbital path to our planet's without being gravitationally tied to Earth ...

June’s stargazing lineup includes the chance to see most of our solar system’s planets and, toward the end of the month, the full Strawberry Moon. Here are some celestial events that will give you a ...

Astronomers have discovered what they think may be another moon orbiting a distant dwarf planet called Quaoar. This small, ...

When you look up in the night sky, our moon is unmissable.Just like Earth, it's round and has a solid, rocky surface. But is our moon actually a planet? The answer is technically no — at least ...

This month’s stargazing agenda brims with planet sightings. We have planet pairings, moon-planet hangouts, and a special treat to end the month: several evenings with all seven of our space neighbors ...

PASADENA, Calif. –The newly discovered 10th planet, 2003 UB313, is looking more and more like one of the solar system’s major players. It has the heft of a real planet (latest estimates put it at ...

July will be packed with cosmic activity. Mercury, the fastest-moving planet in our solar system, will make a rare and optimal appearance, providing a chance to spot it near the western horizon.

"The profile of the occultation was most consistent with it being a new satellite — a new moon — going around Quaoar." ...