Astronomy for Beginners

New to astronomy? Not sure how to get started in stargazing or which telescope to buy?

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

Astronomy Dictionary
Comet nucleus

The solid, central part of a comet, composed of rock, dust and frozen gases.

Semi-apochromatic (APO) refractor

A refracting telescope that uses three or more lenses to bring red, green and blue light to focus at nearly the same point.

Luminance

This is the name often given to the ‘light frames’ or exposures gathered from a monochrome CCD i.e. without colour.

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