Distant alien planets could be turned into dark matter detectors

Dark matter could be detected on alien worlds orbiting distant suns, a new study suggests. This elusive form of matter is one of the most frustrating and mysterious aspects of modern astronomy. Thought to account for 80% of all matter in the universe, it is completely invisible, detectable only through its slight gravitational pull on […]

Einstein’s theory of relativity, critical for GPS, seen in distant stars

The intriguing system known as 4U 1916-053 contains two stars in a remarkably close orbit. One is the core of a star that has had its outer layers stripped away, leaving a star that is much denser than the Sun. The other is a neutron star, an even denser object created when a massive star […]