TRAPPIST-1: It is an ultra-cool dwarf star about 40 light years away, located in the constellation Aquarius. It is named after the telescope that discovered this system – TRAPPIST (Transiting Planets and Planetesimals Small Telescop) in Chile. The planets have sizes and masses comparable to the Earth and Venus. It is an ultra-cool star (unlikeContinue reading “TRAPPIST-1:”