The candidate for Planet Nine displayed a tiny amount of movement, which could mean it advanced further in its orbit around ...

WD 1856+534b—a freezing world with a surface temperature of -125 degrees Fahrenheit—exists where planets are normally scoured ...

This is probably the most convincing evidence for Planet Nine so far. It is believed that this planet is five to ten times ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

A planet circling at a sharp 90-degree angle to the orbits of its two host stars has now been confirmed. This discovery ...

So which planets in our solar system have rings? All four giant planets — Jupiter, Saturn, Uranus and Neptune — sport these ...

we know a lot about what a planet in its suspected area could be like. The team used qualities like this—such as a very long ...

During the height of the Cold War in the 1960s and 1970s, the USSR launched 29 spacecraft towards Venus, the planet ...

This means that our planet rotates at a slight angle of around 23.5 degrees ... sometimes shifts as the entire orbit of Earth drifts further or closer from the sun. Such stability has likely ...