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
Collimation

In order for a telescope to perform to its full ability the optics (including primary mirror, secondary mirror or lenses) need to be accurately aligned. This can be done by collimating a telescope via several methods including studying the shape of un-focussed stars or by using special laser collimating devices.

Ghost crater

These are craters who have been infilled, buried or submerged by geological processes but are sometimes still just visible on the surface of a planet or moon.

Lenticular galaxy

A lenticular galaxy (also known as a S0 type galaxy) is a galaxy that is disc shaped with no real evidence of spiral arms. Their name derives from how they look when they are edge on – like the shape of a lens.

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