Your selfie game is about to be out of this world.
The new results explain how two planets in this distant solar system may be positioned just right to create life-friendly conditions.
An atmosphere is basically a giant blanket that can protect a planet from a star's barrage of dangerous radiation.
The planetary system, located 40 light years away from Earth, is considered a candidate for finding life outside our solar system.
Life on one planet could easily spread to another, according to the numbers.
Material ejected from a planet with bacteria or single-cell organisms could reach another within just 100 years.
The ultra-cool dwarf star TRAPPIST-1 has seven roughly Earth-sized planets orbiting it, with three in the star's "habitable zone."