Astronomers have discovered an Earth-size planet orbiting an ultracool red dwarf star similar in size to Jupiter. The red dwarf, located some 55 light-years away, is 100 times less bright than the ...
Earth's quasi-moons only temporarily orbit the sun in sync with our planet and will eventually part ways with us forever. (Image credit: NASA/JPL/HORIZONS system) In the "Name a Quasi Moon ...