Astronomers Search for One in a Habitable Zone
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Question is: Astronomers Search for One in a Habitable Zone
and the answer is: PLANET
Word Meaning:
PLANET — (now historical or astrology) Each of the seven major bodies which move relative to the fixed stars in the night sky—the Moon, Mercury, Venus, the Sun, Mars, Jupiter and Saturn.
Definition source: Wiktionary (CC BY-SA 4.0)