Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

Five of the brightest planets will be visible to the naked eye. With help, you may even spot Uranus and Neptune.

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

Have you ever wondered why the planets in our solar system align along a flat plane? Discover the science behind this cosmic arrangement, from the formation of the protoplanetary disk to the forces ...

"This agreement represents a significant milestone for Planet; it is our largest contract to date and is a major step forward ...

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

Witness a rare celestial spectacle as seven planets align in the night sky for one night in late February, offering a ...

Certain extreme planets are called ultra-short period objects if they're very close to their stars and orbit them in mere hours, like K2-22b.

Using in part the NEID spectrograph mounted on the WIYN 3.5-meter Telescope at the U.S. National Science Foundation Kitt Peak ...

Four planets will be in the parade in January, while seven will align in February. Here's how to see the events.

Using data from the European Space Agency's Gaia mission, scientists have found a huge exoplanet and a brown dwarf. This is the first time a planet has been uniquely discovered by Gaia's ability to ...