After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

In the time that it takes for the innermost planet to make eight orbits, the second, third and fourth planets revolve five, three and two times around the star, respectively. But the way the chain ...

Watch this video to find out more about the Earth, planets in our Solar System and other planets far off in outer space. From up here on the International Space Station I get a great view of Earth.

Exoplanets can be quite different from Earth, but occasionally researchers find one that gives a sneak peak into what the ...

Scientists have found two new habitable planets, nearly 8 times the size of Earth ... GJ229A is 7.9 times the size of our planet while GJ180D is 7.5 times bigger. Their size is why scientists ...

Take a look behind the scenes and find out how The Planets team ... playing out on eight very different worlds – the first challenge was to identify which part of each planet’s life story ...

Earth" planet pretty close to us, just outside our solar system! This planet, called Proxima Centauri b, orbits our nearest ...

TOI-6651b is a unique exoplanet, weighing around 60 times the mass of Earth and having a radius approximately five times ...

With their discovery, the planet hunt has taken a turn toward the familiar. These new planets are still no place ... as a diamond-coated wheel carves the 27.5-foot (8.4-meter) expanse into a ...

Planet Nine, according to Batygin, is a “super-Earth” object, about five to seven times the mass ... we know that there are eight planets already, so it’s not so crazy to have another ...

Our Moon is BornThe birth of the planets 4.5 billion years ago was extremely violent. They grew to full size by absorbing rival planet embryos ... of impacts between 1.8 billion and 3.7 billion ...