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
Transient Lunar Phenomena

These are colour changes and brightenings on the Moon’s surface, reported by some lunar observers. Today TLPs also include the flashes produced when meteoroids impact the Moon, which have been recorded many times by CCD cameras.

Accretion disc

A disc of interstellar material around a celestial object, such as a star or a black hole, that has formed by matter being attracted by its gravitational pull.


A camera accessory that measures time intervals, often used to create time-lapse sequences.

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