Well look at that: we may have another “sun” soon. That would be swell, and certainly the greatest thing to happen to sunglasses manufacturers. A scientist in Australia says that Betelgeuse, which is something like 640 light years away, appears to be losing mass at a fairly rapid rate. If that happens the star could go supernova, which would produce such a blindingly bright, uh, image, that it would be as visible in our sky as a second sun. Wild.