Trappist-1 is a dwarf-star, ultra-cool and only slightly larger than Jupiter in size.

The TRAPPIST-1 star is small, barely bigger than Jupiter.

For one, the (actual) star in this announcement is an ultracool dwarf that is about the size of Jupiter, much different than our star.

A solar system relatively close to ours (about forty light-years) consisting of an ultra-cold dwarf star (whose temperature is less than 2500K, ie 2200 ° C).

A solar system relatively close to ours (about forty light-years) consisting of an ultra-cold dwarf star (whose temperature is less than 2500K, ie 2200 ° C).

One of the most intriguing planetary systems discovered to date is TRAPPIST-1, a system of seven Earth-size worlds orbiting an ultra-cool dwarf star about 40 light-years away.