Ĭonjunctions involve either two objects in the Solar System or one object in the Solar System and a more distant object, such as a star. A related word, appulse, is the minimum apparent separation in the sky of two astronomical objects. When two objects always appear close to the ecliptic-such as two planets, the Moon and a planet, or the Sun and a planet-this fact implies an apparent close approach between the objects as seen in the sky. This means they have either the same right ascension or the same ecliptic longitude, usually as observed from Earth. In astronomy, a conjunction occurs when two astronomical objects or spacecraft appear to be close to each other in the sky. The two brightest objects in the night sky When two astronomical objects have the same right ascension or the same ecliptic longitude Visual conjunction between the Moon and the planet Venus.
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