Astronomers believe they may have found a significant portion of the universe's "missing" dark matter hidden in unusual galaxies formed by giant collisions.
Giant planets known as hot Jupiters are even hotter and wilder than scientists expected, according to new research that includes the first map ever made of a planet outside our solar system.
A violent explosion 240 million light-years away could be the first recorded example of the way huge stars died in the early universe, researchers suggest.
Radio waves bounced off Mercury like light off a "celestial disco ball" reveal fluctuations in the planet's spin that suggest it has a liquid center similar to Earth's.
Detailed new scans show that the depth of the red planet's underground ice layer is extremely variable, coming within an inch of the surface in some places.
The most volcanically active body in the solar system recently exceeded its own reputation when an eruption on its surface sent up a plume of frozen gas the size of New Hampshire.
The most Earthlike planet yet has the conditions to support life, including liquid water, say astronomers who found the planet orbiting a star 20.5 light-years away.
New analysis of the near-Earth asteroid Itokawa shows evidence that surface materials on the low-gravity object not only stick around but also are sorted by periodic shaking.
