Ursa Major III, a dwarf satellite galaxy of the Milky Way, may challenge our understanding of galaxy formation and perhaps even the definition of a 'galaxy.'
Astronomers have determined that GJ 9827 d – at only twice the diameter of Earth – is the smallest exoplanet yet found to hold water vapour in its atmosphere.
One of the world's most powerful supercomputers has simulated the largest and densest neutron stars. This new model shows there is a 90% chance that they contain quark-matter cores.
The smallest known brown dwarf, just three to four times the mass of Jupiter, has been discovered 1,000 light years away by astronomers using the James Webb Space Telescope.
Work has begun on the seventh and final mirror of the Giant Magellan Telescope, which is expected to provide four times the image resolution of previous observatories.
