Most of the planets are aligned in our night sky right now, providing a treat for skywatchers. Are such "planetary parades" ...

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

Ceres, the largest object in the asteroid belt, may hold answers to fundamental questions about the Solar System. This dwarf ...

Pluto may not be a planet any more, but you still have a chance to see the distant dwarf planet at one of Michigan's ...

A nearly new moon and mostly clear skies will present near ideal viewing conditions for the planet parade through Feb. 28.

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

The dwarf planet is a bizarre ... in smaller quantities -- other elements form the basic building blocks of all life. In recent years, researchers have found such molecules at great distances ...

Explore Ceres, the largest asteroid in our solar system, and discover its remarkable ancient ocean and ice-rich crust.

The building blocks of life could have been delivered to Ceres by one or more space rocks from the outer asteroid belt.

"Unfortunately, Dawn can't detect all types of organic compounds," Nathues ... the protoplanet Vesta from 2011 to 2012, and the dwarf planet Ceres from 2015 to 2018. The mission's scientific ...