Scientist use extremely powerful telescopes and machines to measure the brightness of stars. If a planet were to pass in front of the star than the stars brightness may dip by 1/1000th of a percent. The telescopes are so powerful that they are able to measure this dip and thus allow scientist to detect exoplanets.
which exoplanet is 'THE exoplanet'?
The darkest exoplanet is "TRES-2B".
No. An exoplanet is a planet outside of our Solar System.
51 Pegasi itself isn't an exoplanet, it's a Sun-like Star. But it does have an Exoplanet orbiting it, 51 Pegasi b (informally named Bellerophon.).
No. A moon is not a planet. An exoplanet is aplanet that orbits a star other than the sun.
Both exoplanet and extrasolar planet are planets that are outside the solar sysytem.
No. The nearest exoplanet is more than four light years. We cannot travel anywhere close to that distance
Yes. While we know relatively little about the atmospheres of individual expolanets, there is no reason an exoplanet couldn't have an exosphere.
We do not know enough about conditions on any exoplanet to determine if any would be suitable for humans.
yes
extra-solar planet.
no cheat's. xD