A team of astronomers including Eric Agol of the University of Washington has found that the seven Earth-sized planets orbiting the star TRAPPIST-1 are all made mostly of rock, and some could even have more water — which can give life a chance — than Earth itself. The research was led by Simon Grimm of the University of Bern in Switzerland, and published Feb. 5 in the journal Astronomy and Astrophysics. Agol is among about two dozen co-authors. The scientists…





































