The First
Photo Credit: NASA, ESA and G. Bacon (STScI)

 
51 Pegasi b was the first planet discovered in orbit around a normal star other than our Sun. The planet, a hot Jupiter, also goes by the moniker “Bellerphon,” after the Greek hero who tamed winged-horse Pegasus, in reference to the constellation Pegasus where the planet is located.
Number 9: Closest planet
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