The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Explore Ceres, the largest asteroid in our solar system, and discover its remarkable ancient ocean and ice-rich crust.

Why is Pluto no longer a planet? Discover the real reason behind Pluto’s reclassification as a dwarf planet and the science that led to this change.

Asteroids that orbit close to the Earth inevitably cause us some anxiety due to the even remote possibility of a collision.

Take advantage of a special 6-7 planet alignment from Earth's perspective. Planets 'line up' in the skies over California in ...

A new study examines how much material from the closest star system to Earth will end up in orbit around the Sun, and how ...

In a groundbreaking new study, researchers have unveiled the existence of a “cosmic highway”—a pathway of interstellar ...

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

Using the Keck Planet Imager and Characterizer (KPIC), astronomers have performed high-resolution spectroscopic observations ...

Jan. 15, 2025 — New observational data and simulation models have confirmed a new type of planet unlike anything found in the Solar System. This provides another piece of the puzzle to ...

The organic material found in a few areas on the surface of dwarf planet Ceres is probably of exogenic origin. Impacting asteroids from the outer asteroid belt may have brought it with them. In the ...

The building blocks of life could have been delivered to solar system dwarf planet Ceres by one or more space rocks from the ...