#solar-system

2 articles

Comets and Asteroids: The Solar System's Leftovers

Why asteroids are rocky and comets are icy, how a comet grows a coma and tails as its ices sublime, and why a comet's tail always points away from the Sun.

10 min read·Aug 5, 2026

Astronomy & Cosmology

How the Solar System Formed

How a collapsing cloud of gas and dust spun itself into a flat disk 4.6 billion years ago, why the Sun holds almost all the mass, and how the frost line split the planets into small rocky worlds and distant giants.

10 min read·Jul 2, 2026