Skygazers, mark your calendars because one of the coolest celestial events is coming around again toward the end of February.

If someone tried to put a price tag on Earth, what would that number even be based on? Land, oceans, ecosystems, raw ...

A decade of observations of four planets around the young planetary system V1298 Tau revealed a rare, long-sought missing link in planet formation.

Spectacular clouds swirl across the surface of Jupiter. These clouds contain water, just like Earth's, but are much denser on ...

In theory, a planet may be able to orbit a binary star system in a figure of eight, but it may not be particularly stable, ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

After studying thousands of computer simulations of the solar system, researchers at Rice University and the Planetary Science Institute think there’s a 40% chance an elusive “Planet Nine” or “Planet ...