Question

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.

2. It can be inferred that some exoplanet candidates are “false positives” because
they are far away and difficult to see.
telescopes alone are not reliable.
they turn out to be stars.
there are a large number of candidates.

Answer 1

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

2. They turn out to be stars. (Some candidate signals are from stellar binaries or other stellar phenomena, not planets.)