The Milky Way has a secret history of galaxy mergers that we are only now starting to uncover.
A composite image of data from the Hubble Space Telescope, the Kitt Peak four-meter telescope and MOTHRA reveal the Helix Nebula. We can see the bow shocks, particularly on the left.
A greedy galaxy that existed less than 1.3 billion years after the Big Bang is hoarding supermassive black holes.
On this day in space, Aug. 17, 1877: American astronomer Asaph Hall discovered Mars’s moon Phobos.
The wildfires ripping across North America have created massive plumes of smoke.
A river of gas over a trillion miles long is streaming onto a young planet-forming system and is tipping it over.
New chronology, data about the moon’s far side and a homegrown cartographic standard signal China’s ambitions for how the solar system gets mapped.
“We’re not just studying astronomical objects anymore; we’re using them to test the laws of nature.”
We need rules to prevent space companies from dumping their old rockets onto the moon’s surface in the future, experts say.
Water and cosmic dust can survive in the harsh environment near Sagittarius A*, new observations reveal.