Before defining what a light-year is, we should define what a light-year is not: It is not a measure of time, but rather a ...

Scientists have found that Uranus emits its own internal heat, contradicting data from NASA's Voyager 2 probe nearly four decades ago.

A new study led by University of Houston researchers, in collaboration with planetary scientists worldwide, suggests Uranus does have its own internal heat—an advance that not only informs NASA's ...

After its voyage past Mars, Mariner 4 maintained intermittent communication with JPL and returned data about the interplanetary environment for two more years. But by the end of 1967, the spacecraft ...

Shrouded by a swirl of gas and dust, a gas giant, roughly three to ten times the size of Jupiter, was found in a new ...