from 2000 bc until 1992 ad astronomers had only

From 2000 BC until 1992 AD, astronomers had only discovered three new planets.  In 2014, NASA’s Kepler space telescope team announced the discovery of over 700 new planets.

WTF Fun Facts 

Source: https://www.space.com/28111-biggest-alien-planet-discoveries-2014.html

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