After the spring we have had, we could all use a smile -- and the solar system is about to provide one. 

Astronomers say the moon, Jupiter and Venus will align to form a smiley face in the sky on May 16.

This rare spectacle is called conjunction and is not to be missed as the last time this happened was 12 years ago in 2008.

According to RMG, "In astronomy, a conjunction occurs when any two astronomical objects (such as asteroids, Moons, planets, and stars) appear to be close together in the sky, as observed from Earth."

The same phenomenon will most likely occur again in 2065.

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