| Term: | Conjunction |
| Definition: |
A position of two bodies in the solar system when they have the same celestial longitude, seen from the Earth. The bodies can be a planet and the Sun, two planets or the Moon and a planet. The superior planets are in conjunction with the Sun, when, seen from the Earth, they are right behind the Sun. The inferior planets, such as Mercury and Venus, have two conjunctions with the Sun: inferior conjunction, when they are between the Earth and the Sun, and superior conjunction, when they are on the other side of the Sun. |