NASA announced this week that it has confirmed a tally of 6,000 exoplanets, or worlds orbiting distant stars. The first exoplanets were discovered 30 years ago.
Did early Mars support life? A new study shows how volcanic sulfur on Mars could have kept the planet warm and wet enough to be habitable billions of years ago.
Using the Very Large Telescope, astronomers have seen the growth of baby planet AB Aurigae b. It is still surrounded by dust in its protoplanetary disk.
Scientists have thought the organics in Enceladus' plumes originate in its ocean. A new study suggests at least some of them might be formed by radiation.
Astronomers have spotted a mysterious gamma-ray burst that lasted for a day. This is by far the longest event we've seen of its kind. So what caused it?
Astronomers looked at 130 years’ worth of data on planetary nebula IC 418. They found its central star is heating up faster than any star ever observed.