This artist’s impression shows the view from the surface of one of the planets in the TRAPPIST-1 system. At least seven planets orbit this ultra cool dwarf star 40 light-years from Earth and they are all roughly the same size as the Earth. They are at the right distances from their star for liquid water to exist on the surfaces of several of them. This artist’s impression is based on the known physical parameters for the planets and stars seen, and uses a vast database of objects in the Universe.

Artist’s view of the Star Trappist-1 from the surface of one of the seven planets orbiting it. Several of these planets are at the right distance from their star to potentially harbor liquid water on their surface.
Seven Earth-sized planets have been detected orbiting Trappist-1, an ultra-cool dwarf star in our galactic neighborhood. Some of them appear to be potentially habitable. The latest results of this study were published today in the journal Nature.
Never before has the discovery of a new exoplanetary system caused such a wave of excitement among astronomers. An international research team has detected no fewer than seven planets, all around the same size as Earth, and probably rocky, …