Theia is the name of a hypothetical planet. In the early solar system, it is believed that the Earth was struck by a proto-planet about the size of Mars. The theory is that the collision of the two young planets caused the formation of the Earth's Moon.
THEIA is the acryonym for a telescope proposed by NASA called the Telescope for Habitable Exoplanets and Interstellar/Intergalactic Astronomy.
In Greek mythology, Theia was a Titan who was the mother of the moon goddess Selene. The name means "Goddess or Divine". In 2015, Theia was given to 75 girls.
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