Earth's Identical Twin Only 4 Light-years Away?

There are possibly millions of Earth-like planets lying out there in the immensity of the universe, each bearing just the proper conditions for the appearance and evolution of life, we just have to find them. Only a decade ago or so, the human race wasn't even capable of telling whether ... [ read more >> ]

Image of the closest star to Earth, besides the Sun, Alpha Centauri (center left)

Image comment: Image of the closest star to Earth, besides the Sun, Alpha Centauri (center left)
Image credits: ESO

Image of the closest star to Earth, besides the Sun, Alpha Centauri (center left)