Exoplanets could be habitable, scientist says
They are located in the Trappist-1 system
China builds Mars simulation base in Qinghai province (VIDEO)
It will have an area of 7.000 acres and will include a simulation base, scientific facilities and a tourist center
Nasa finds entire solar system filled with eight planets like our own (VIDEO)
Researcher Andrew Vanderburg said he would be surprised if there wasn't even more planets lurking to add to the newly discovered systems