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
Supernova remnant

The relic of a supernova explosion, comprising a neutron star, pulsar or black hole, and an expanding cloud of gas.

Sun pillar

A vertical column of light that appears above or below the Sun at sunset or -rise.

Comatic aberration (coma)

An optical defect in a lens, which means light rays that enter the edge of the lens at an angle converge so as not to be brought to a sharp focus. The result is a smearing of detail towards the edge of the field of view.

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