Understanding how the habitability of our solar system's inner planets—Mercury, Venus, Earth and Mars—would change had there been a super-Earth opposite Mars can help guide astrobiologists ...

With a radius of 3,959 miles, Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface. Earth is also unique in terms of ...

All of our solar system’s planets are lining up to parade ... Mercury, which is closest to the sun, takes about 88 Earth days to complete an orbit, while Neptune, which is most distant, takes ...

Plate tectonics give Earth its mountains, earthquakes, continental drift and maybe even helped give rise to life itself. But do other planets in the solar system have them too?

Find out about the solar system and learn the order of the planets with a song in this video! The Sun is a star. The Earth is one of eight planets that travel around the Sun. The planets are ...

"This research is helping us fill a crucial gap in our understanding of coronal magnetic fields, which are the source of the ...

A map showing ... to wear solar filters to protect eyes. An annular solar eclipse is caused by the Moon looking slightly smaller in the sky than the Sun (because it’s farthest from Earth on ...

Jupiter is the largest planet in the solar system and has 79 moons. The four largest moons of Jupiter (Io, Europa, Ganymede, and Callisto) can be seen from Earth with just a pair of binoculars.

They developed a 3D model that simulates how the solar system's orbital architecture may have evolved differently with the formation of a planet that is at least twice the size of Earth's mass—a ...