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.
This is an irregular galaxy which exhibits a bar structure.
A camera accessory that measures time intervals, often used to create time-lapse sequences.
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.