Planetary Science
The study of planets, moons, and other bodies in the solar system.
Articles with this tag: 3
Updated: May 13, 2026
Asteroid
Asteroid: Small rocky bodies of the Solar System
An asteroid is a small rocky object orbiting the Sun. This article explains what asteroids are, their composition and orbits, discovery history, roles in science and hazards, and h
Chicxulub crater
Colin Pillinger
Colin Pillinger: British planetary scientist and Beagle 2 lead