An entirely new class of galaxy-escaping hypervelocity stars

Every once in a while, the Milky Way's supermassive black hole flings a wayward star into intergalactic space at speeds reaching 2 million miles per hour. But astronomers have now discovered a surprising new class of "hypervelocity stars" that can escape the galaxy — and they don't need the galactic core to do it. » 1/10/14 8:00am 1/10/14 8:00am

The first picture ever of a Tatooine-like binary star system. Maybe.

What you're looking at here is the first direct imaging of a planet orbiting a pair of stars. Trouble is, the planet is so large — about 12 to 14 times the size of Jupiter — that it might actually be a failed star, a so-called brown dwarf. But for now, the astronomers are cool with calling the massive object a planet. » 3/26/13 10:56am 3/26/13 10:56am

Astronomers discover binary stars in 'impossibly' tight orbits

A team of scientists using the United Kingdom Infrared Telescope (UKIRT) in Hawaii have found four different pairs of binary systems whose stars are so close to each other that it takes them less than four hours to orbit one another. Previous estimates indicated that stars shouldn't be allowed to do this — they… » 7/06/12 5:00pm 7/06/12 5:00pm