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

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Shop at Amazon US

Current Moon Phase

CURRENT MOON

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