Astronomy for Beginners

Here’s where you’ll find observing guides, how-to articles and great astronomy hints and tips. Don’t forget to also check out our comprehensive astronomy dictionary.

Astronomy Dictionary
Craterlet

A small crater ranging from a few millimetres across to a few metres.

Perihelion

The point in the orbit of an object that takes it closest to the Sun.

Proton

A subatomic particle that resides in the nucleus of an atom and carries a positive electrical charge.