Astronomers have found thousands of exoplanets around single stars, but few around binary stars—even though both types of stars are equally common. Physicists can now explain the dearth.

A new "Tatooine-like" planet outside the solar system may orbit two failed stars, scientists reported Wednesday.Related video above: The dark energy pushing our universe apart may not be what it seems ...

Add Yahoo as a preferred source to see more of our stories on Google. University of North Carolina researchers have recently discovered a baby exoplanet that could challenge our current understanding ...

The International Astronomical Union defines a planet as a celestial body that orbits the sun, is massive enough that gravity has forced it into a spherical shape, and has cleared away other objects ...

Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

The planet formed 50 million years after the dinosaurs died, making it incredibly young in cosmic terms. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...