In the early days of our solar system, when the Sun was still young and the planets were barely formed, Jupiter wasn’t the ...

Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million ...

Save guides, add subjects and pick up where you left off with your BBC account. From up here on the International Space Station I get a great view of Earth. Our planet is just the right distance ...

Pluto was reclassified as a dwarf planet in 2006. Our solar system may have a ninth planet ... scientists say The hidden candidate is likely the size of Neptune and is so far away that it could ...

With the exception of Pluto, planets in our solar system are classified as either terrestrial (Earth-like) or Jovian (Jupiter-like) planets. Terrestrial planets include Mercury, Venus, Earth, and ...

others the size of a house, and a few as big as a planet. This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being.

Are planets in the solar system that are closer to the Sun older ... As the particles clung together, the microscopic grains became pebble-size objects and then grew and grew.