Question

An exoplanet, or extrasolar planet, is a planet outside of our solar system that usually orbits another star in our galaxy. Most of the exoplanets discovered so far are in a relatively small region of our galaxy, the Milky Way. (“Small” meaning within thousands of light-years of our solar system; one light-year equals 5.88 trillion miles, or 9.46 trillion kilometers.) That is as far as current telescopes have been able to probe. We know from NASA’s Kepler Space Telescope that there are more planets than stars in the galaxy.

Although exoplanets are far away — even the closest known exoplanet to Earth, Proxima Centauri b, is still about four light-years away — scientists have discovered creative ways to spot these seemingly tiny objects. An exoplanet candidate is a likely planet, discovered by a telescope, that has not yet been proven to actually exist. It is possible for some candidates to turn out to be "false positives"
A planet is considered “confirmed” once it is verified through additional observation using two other telescopes.

1. An exoplanet is a planet that
orbits a different star than Earth’s sun.
is usually about four lightyears away.
has not yet been proven to exist.
circles Earth’s sun from a different part of the galaxy.

Answer 1

1. orbits a different star than Earth’s sun.