Scientists believe they've worked out why some extrasolar planets orbit in the opposite direction to their star's rotation.
Scientists at the US Department of Energy's Brookhaven National Laboratory have made the heaviest antimatter ever found.
An astronomer says he's caught a star in the act of chewing up a companion and spitting out a second generation of exoplanets.
Astronomers have discovered the biggest star ever - more than 300 times the mass of the Sun, and twice as large as the generally accepted limit of 150 solar masses.
What could be the youngest known star has been photographed in the earliest stages of being born.
Astronomers have discovered a gas-giant exoplanet locked into a circular orbit around its parent star.