While measuring the speed of stars whirling around a nearby dwarf galaxy, astronomers have realized that a reservoir of dark matter may be lurking within.
Astronomers have detected something baffling at the furthest frontiers of our observable universe: lots of massive galaxies that shouldn't even exist.
Recent observations of the gaps in protoplanetary disks surrounding nearby young stars may not be 'proof' of the formation of exoplanets.
An object that is believed to be a spent rocket body or other component from a lunar-bound spacecraft will make a fiery return to Earth on Nov. 13, likely burning up in the process.
Like a woodworm-infested log, new photos from NASA's New Horizons mission of dwarf planet Pluto have revealed a pockmarked terrain that is as puzzling as it is beautiful.
Our universe is actually really simple, it's just our cosmological theories that are getting needlessly complex, argues one of the world's leading theoretical physicists.
New maps of Ceres show the dwarf planet's mysterious bright spots and huge, pyramid-shaped mountain in a new light.
In a new image release from NASA's Pluto mission, there's yet another landscape that, for now, defies explanation.
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