The Very Large Telescope's black-hole instrument has been activated, and has already made a stellar discovery.
Telling time involves mental arithmetic with the open-source Binary Wristwatch, a gloriously geeky way to mark the hours.
A five-year study of data from the Kepler space observatory has found that over half the possible planets it has identified are either eclipsing binary stars or brown dwarfs.
Two suns are spotted touching, a dramatic last contact before the end. But will they merge into one or follow "a new evolutionary path" leading to binary black holes?
The discovery of a planet orbiting a binary star in the habitable zone is the tenth of its kind, indicating such planets are more common than previously thought.
Astronomers have found the very first quintuple star system consisting of two sets of eclipsing binary stars and one solo star.
Rocky planets that orbit a binary star system, like the fictional home of Luke Skywalker, were thought to be impossible, until now.
The Sphere instrument on the VLT in Chile peers with all its might into the blackness around a binary star system and returns a surprise for astronomers.
The nearest star beyond our own sun is 4 light-years away, but not long ago (in terms of cosmic time) a small binary star system buzzed the edge of our solar system, coming five times closer to Earth.
NASA will broadcast pictures of the huge binary asteroid as it zips by, and you can watch it here.