00:00Imagine trying to live on our closest alien planet.
00:04This is Proxima Centauri B, just 4.2 light-years away.
00:09A super-Earth, 1.3 times bigger than Earth, with an 11-day year.
00:14It is tidally locked.
00:17One side is trapped in permanent, scorching daylight.
00:21The other side is frozen in eternal darkness.
00:24The only place you could possibly survive is the thin line in between.
00:30A twilight ring, called the Terminator Zone.
00:33Its star is a violent red dwarf that unleashes apocalyptic flares.
00:38This planet gets blasted with 400 times more X-ray radiation than Earth.
00:44Enough radiation to completely strip away an atmosphere.
00:48And yet, it sits right inside the habitable zone.
00:53Liquid water could exist there.
00:55If life does exist, it would not be on the surface.
01:00It would have to be hiding deep underground, or deep in an ocean, to survive the flares.
01:06Beautiful.
01:07Brutal.
01:08And our closest neighbor.
