Scientists have found that dark matter interacts with itself even less than previously thought, which narrows down what the substance might actually be.
Scientists have gotten the best view yet of a dusty gas cloud, G2, after it made its closest approach to the supermassive black hole at the center of the Milky Way.
Scientists have made the attempt to better understand the rotation of Saturn, a planet that rotates at different speeds in different parts of its sections.
Scientists have learned a bit more about an ancient lake system on Mars.
A supermassive black hole at the center of a large galaxy can power huge outpourings of material from the galaxy's core, according to new observations.
On Jupiter there's an aurora that glows continually. Now, new observations reveal that this display sometimes flares up because of a process that has absolutely nothing to do with the sun.
Scientists have caught an outburst from a baby star with the help of orbiting observatories and ground-based facilities.
The Mars Curiosity rover may have found something unusual on Mars; it's discovered fixed forms of nitrogen, which suggest that there may have been a nitrogen cycle sometime in Mars' past, just like on Earth.
Astronomers have discovered that the "star" that appeared in the sky in 1670 wasn't a nova, but was something far rarer.
Astronomers have uncovered the leftover fingerprints of ancient stars that probably formed shortly after the Sculptor dwarf galaxy formed, about 13 billion years ago.
Long before Mercury, Venus and Earth formed, our solar system may have harbored other planets. In fact, scientists believe that it may have possessed super-Earths, which are planets larger than Earth but smaller than Neptune.