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.

The point in the orbit of a body such as a planet, comet or asteroid when it's furthest from the Sun.

Diagram showing the perihelion and aphelion points in the orbit of a hypothetical object around the Sun.

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