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

Sky Highlights - April 2017

Shop at Amazon US

Shop at Amazon US

Current Moon Phase



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.