It has life on it. Nobody has

It is the year 2366 and a nearby telescope spots a planet that has life on it.  Nobody has seen an alien yet so they all get into their rockets.  These rockets go at light speed but it may still take a long time to get there depending on how many light years away it is. Eventually the spaceships arrive at this faraway planet hoping for the chance to meet an alien.  An alien arrives with many antenne and glowing purple eyes.  Some humans hold out translators to the alien.  “Welcome to our planet!”  says the alien.  Although that story was set in 2366 a similar story could happen in 2018.  (there would not be a spaceship for every human or a purple eyed alien with many antenne though.)  A planet like the one in the story would be called an exoplanet.  An exoplanet is a planet that is not in this solar system.  Some exoplanets could possibly have life on them! A few of those intriguing exoplanets are called, kepler 186-f, kepler 452-b, the TRAPPIST-1 system, and proxima centauri b.  Kepler 186-f is an earth sized goldilocks planet.  (a goldilocks planet is a planet that is at the correct temperature to support life)  it is 10% more massive than earth it is in a solar system with 4 planets besides it.  Its host star is a red dwarf star which has a lifespan of hundreds of billions of years making the chance of finding aliens on this planet much higher.  kepler 186-f is tidally locked meaning that one hemisphere, or half of the planet will forever face its host star, making it incredibly hot.  The other hemisphere is forever facing away from its host star, making it incredibly cold.  At the prime meridian of this planet there might be liquid water, and where there might be water there might be life!  Kepler 452-b is the second planet in its solar system.  It is 50% more massive than earth and may even be a gas giant like jupiter.  Although its host star is not a red dwarf yet it is becoming one soon meaning that this planet will soon become very hot.  This planet may be too hot even now to support life or even water.  Kepler 452-b might currently have a similar temperature to venus.  The TRAPPIST-1 system has 7 planets, three are in the habitable zone.  They are most likely terrestrial planets like earth that have a surface made of rock.  Their host star is a dwarf star called TRAPPIST-1 that is about the size of jupiter.  There is a large chance of there being life on one of those three planets.  Or even on more than one of them!The closest exoplanet to earth is proxima centauri b, Proxima centauri b is the second planet in its solar system.  This exoplanet is very similar to earth and just like most habitable exoplanets, it orbits a red dwarf, the red dwarf it orbits is called proxima centauri.  Proxima centauri b is 30% bigger than earth and being the closest exoplanet to earth it is only 4.2 light years away, which is not that far in space.  (a light year is the amount of distance you can go in one year at the speed of light.)