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
Penumbra (lunar eclipse)

This is the out lighter part of the Earth’s shadow cast out into space. It is the first part of the Earth’s shadow that the Moon enters at the beginning of a lunar eclipse.

Ellerman Bombs

Ellerman bombs are bright explosions seen in the Sun’s chromosphere around newly formed active regions. They are named after the solar astronomer Ferdinand Ellerman who discovered them in September 1915.

Oort Cloud

This is a vast cloud of small icy bodies that envelops the Solar System. It is thought to contain trillions of objects and resides 30 trillion kilometres from the Sun.

We use cookies to improve your experience of our website. Cookies perform functions like recognising you each time you visit and delivering advertising messages that are relevant to you. Read more here