The signal came in on ANZAC Day, ripples in space-time from the merger of two neutron stars an estimated 500-million light years away. But where it happened is still a mystery.
Science is full of surprises. While searching for planets orbiting nearby stars, researchers stumbled across the remains of a star that once outshone the Sun.
A spinning black hole is pumping vast amounts of energy back into the surrounding universe, but something is causing the jets that transport that energy to wobble very rapidly.
The far side of the Moon sees its share of sunlight – it's dark only in the sense that it's mysterious because it's never visible from Earth. Here's why.
By studying old and dead stars, we can discover what will happen to our sun in the far, far future. And it won't end with a big explosion.
Astronomers say they have "seen what we thought was unseeable" in releasing the first image of a supermassive black hole. So how did we get to this historic observation?
Shooting stars are not stars at all. They are tiny space adventurers who accidentally wander into our sky and get sucked toward us by Earth's gravity. Here's the story of a shooting star's journey.
Taking a look at the interesting world of the South African Astronomical Observatory.
Odd event could be explained by a star being ripped apart by a black hole.
The moon's far side looks redder than its near side. An expert explains what the actual colour is.
Moonlight will spoil some of the big meteor showers this year, but still plenty of others to see. So here's your guide on when and where to look to catch nature's fireworks.
If we didn't correct for gravitational effects on the Earth's orbit, the winter solstice would shift backwards by a day every 72 years.
A black hole is an object with such a strong gravitational pull that nothing, not even light, can escape from it.
The comet 46P/Wirtanen is just 1.2km in size but it should be visible in the night sky this Saturday as it makes a close approach to Earth this year. And don't forget the Geminids meteor shower.
A bright comet visible in December provides an excellent viewing opportunity for night sky lovers – even potentially with the naked eye.
Expect a spectacular display of 120 or more meteors per hour – some of them brightly coloured.
More ripples in space-time have been detected from merging pairs of black holes, one of which was the most massive and distant gravitational-wave source ever observed.
We will never see 'Oumuamua again, and we may never know exactly what it is. But with the right kind of media coverage it could inspire some kids to take up a career in science.
A number of surrounding galaxies are slowly being devoured by the most luminous object in the sky.
The new planet is believed to be orbiting Barnard's Star, a red dwarf that's not visible to the naked eye but one of the closest stars to our Solar System.