Humans have wondered about far-off planets since antiquity. Waxing on about possible alien worlds is much different than nailing down concrete evidence for them, however. This may come as a shock to you, but science couldn't confirm the existence of exoplanets until 1992. You know, the year "Wayne's World" came out.
WHAT ARE THOSE?!
Planets. Planets, Everywhere.
Key Facts In This Video
The first confirmed exoplanets were found orbiting a pulsar in 1992. 02:03
Hot Jupiters are gas giants that orbit very close to their star. 04:30
During a transit, a planet passes in front of its star, letting Earth astronomers detect a dip in the star's brightness. The amount of light blocked tells you the planet's size. 05:52
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