NASA mission has discovered a second Earth-sized, rocky planet within the habitable zone of its star -- the range of distances where liquid water could occur on a planet's surface
Jupiter is coming closer to Earth than it has since 1963. This is due to Earth and Jupiter's differing orbits around the sun, they do not pass each other at the same distance each time
Today some 3,600 exoplanets have been found, ranging from rocky Earth-sized planets to large gas giants like Jupiter