For most of January, four of the eight planets in our solar system (sorry, Pluto) will be visible if the sky is clear enough ...

Earth is now closer to the sun than at any other time of the year. Here's why our planet's axial tilt, not proximity to the ...

astronomers found a planet orbiting the nearest star to Earth in this system, called Proxima Centauri. Graphic representation of the relative distances between the nearest stars and the Sun.

Help JoJo put the planets in the correct order staring with the closest to the Sun. Watch the video to help you before starting the quiz. BBC Homepage Skip to content ...

Narrator: As the solar system grew, four rocky planets: Mercury, Venus, Earth and Mars, were created closest to the Sun. Made of rocks and metals, they have solid surfaces and a central core of ...

NASA's record-setting spacecraft was just 3.8 million miles from the sun's surface—the closest any human-made object has ever ...