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
Emission nebula

A cloud of interstellar gas that is being made to glow (emit). The emission is usually due to the strong radiation from hot young stars within the cloud or in its vicinity.


A transit is when a celestial body passes in front of another body that is of a greater apparent diameter than itself. This could be, for example, one of Jupiter’s moons passing in front of Jupiter’s disc.


A vast gathering of typically billions of stars. They come in many shapes and sizes throughout the Universe.

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