The point in the orbit of an object that takes it closest to 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

CURRENT MOON

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