Scientists on NASA's New Horizons mission, which performed the first-ever flyby of Pluto in July 2015, will officially propose a new definition of "planet" next month ? one that gives Pluto its planethood back.
Astronomers have never seen anything like this before: Seven Earth-size alien worlds orbit the same tiny, dim star, and all of them may be capable of supporting life as we know it, a new study reports.
The NASA telescope sights were set on the system for 500 hours (about 21 days) and transits of the planets identified and characterized them. TRAPPIST-1 is 39 light years away and harbors 7 earth-sized planets.
The ultra cool dwarf star system is about 39 light-years from Earth. Find out how long it would take NASA's Space Shuttle, the New Horizons spacecraft and Breakthrough Starshot's proposed laser sail-propelled vehicle to travel to the system.