Beginning of the end of the world: May 21st is what a California minister (with a considerable following) predicts. Scientists, for their part, consider the sun's 'habitable zone' in calculating when Earth will become toast.
A team of astronomers say they have found a solar system that includes at least five Neptune-like planets – all within the equivalent of Mars's orbit. There might be two other planets, as well, including the smallest exoplanet yet found.
R136a1 could once have been 320 times as massive as the sun. That's twice as massive as scientists thought a star could be. Perhaps R136a1 is several stars close together, some say.