Located around 858 light-years from Earth, WASP-121b has 1.2 times the mass of Jupiter but is puffed out, making it 1.9 times the width of the solar system's largest planet. It is so close to its ...

While it's likely too hot to host alien life, the planet's existence suggests that the universe has been forming rocky planets almost since its inception 14 billion years ago. Researchers from the ...

The closest analog is Io (pronounced “eye-oh”), one of Jupiter’s largest moons ... “When planets initially form, particularly for rocky terrestrial planets, they go through a magma ...

Scientists found an intriguing world in our galaxy. They confirmed the existence of a rocky planet, called a "super-Earth," that's some six times as massive as Earth. While the world HD 20794 d is ...

Much larger than the rocky planets, these cosmic giants are accompanied by numerous moons. Jupiter, famous for its red spot, is the largest, followed by Saturn with its rings made of ice ...

With a radius of 3,959 miles, Earth is the fifth largest planet in our solar system ... understand in detail—helping us see how other rocky planets behave, even those orbiting distant stars.