That’s because these planets are primarily made from gas and have no solid surface. This group of planets is also known as the ‘Jovian Planets’ after the Roman god Jupiter. Jupiter is ...

The Red Planet is rocky, much like Earth. The inside structure of Mars is also similar to Earth's, NASA rovers have revealed. Mars' outer crust is 6 to 30 miles (10 to 50 km) thick and is composed ...

New research may shine a light on part of outer space's great mysteries ... the gravitational pull of our solar system's planets and passing stars do not have much of an effect on the Oort ...