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.

The position of a celestial body east of the vernal equinox measured along the celestial equator. It's measured in units of time from 0 to 24 hours and the co-ordinates are relative to a certain year. The most commonly used year is 2000 (epoch 2000.0).

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