Numerous ‘Earth-sized’ exoplanets discovered orbiting a nearby star

At a press conference today, a Dutch-led international research team has announced the discovery of several Earth-sized exoplanets orbiting a star 40 light-years away. Three of those planets are in the habitable zone where conditions would be amenable to liquid water, raising the possibility that humans — or some other life form — could potentially inhabit them.
The research team used ground and space-based telescopes to observe TRAPPIST-1, a star 40 light-years away from