Four new Earth-sized exoplanets have been discovered orbiting a star about 40 light-years away - and each may contain liquid water and be able to sustain life, astronomers from NASA and the European Southern Observatory said Wednesday. A Belgian-led team was able to spy these planets using space- and ground-based telescopes as they passed in front of their host, a red dwarf star known as TRAPPIST-1.
from NBC News Top Stories http://ift.tt/2lrb0sj
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