Kepler-22b was given its the designation Kepler as it is one of
many planets discovered by the Kepler observatory. The 22b refers
to it being the innermost (and only known) planet orbiting the star
Kepler-22.
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No. Kepler-22b is between the size of Earth and Neptune.
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Some evidence suggests Kepler-22b may have at least one moon,
but it is not confirmed.