Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper ...

The origin of the differing tilts in the orbits of the planets in our solar system may have been revealed through the ...

Astronomers have discovered a brand new type of planet outside our solar system that, even in its infancy, is already bigger ...

The cosmic butterfly has also produced plenty of PAHs – large hydrocarbon molecules that could play a key early role in ...

On Aug. 24, 2006, the International Astronomical Union (IAU) decided that Pluto wasn't a planet anymore. Instead, Pluto is ...

Penn State astronomers are using data from NASA’s James Webb Space Telescope, combined with theoretical models, to ...

Transmissions between Earth and our own spacecraft could tell us where to look for potential alien transmissions.

From the scorching surface of Mercury to the icy edges of Neptune, our planetary neighborhood is full of wonders. The order of the planets isn’t just trivia—it tells a story about temperature, ...

Aliens may have been closer to Earth than first thought. New research from NASA reveals that Ceres, the dwarf planet in the ...

Most cosmic dust exhibits random atomic structures, and appears like soot. Thanks to NGC 6302’s extreme stellar energy, the ...

Earth is so far the only known planet on which life exists—with liquid water and a stable atmosphere. However, the conditions were not conducive to life when it formed. The gas-dust cloud from which ...