View cloud cover over the UK in the latest satellite image from the Met Office

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
Barred Irregular Galaxy

This is an irregular galaxy which exhibits a bar structure.


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

Elliptical galaxy

These are galaxies that have predominantly old stars with a shape that ranges from nearly spherical to highly elliptical, and that contain little or no gas and dust.