Shop at Amazon US

Contributions

If you like the website and want to contribute to the running costs then please do so below. All contributions are most welcome.

PayPal - The safer, easier way to pay online.

An active galactic nucleus (AGN) that emits large amounts of energy as electromagnetic radiation. The word is derived from 'quasi-stellar radio source'.

3C 273 is the brightest quasar. At magnitude +12.9 it's visible in medium size amateur scopes (credit:- ESA/Hubble/NASA)

Glossary A B C D E F G H I J K L M N O P Q R S T U V W X Y Z