Jupiter has a radius of 43,441 miles and is 11 times the size of Earth. The planets in order of size, listed from biggest to smallest: Jupiter: 43,441-mile radius; Saturn: 36,184-mile radius; ...

The smallest and largest planet that form our solar system range incredibly in temperature, composition, geology, and of course size. Here we will delve into what makes these two planets unique ...

Planets Ordered By Size Another way to keep track of all the planets is to order them by size. If you wanted to do this, the order from smallest planet to largest is Mercury, Mars, Venus, Earth ...

How Many Planets Are There in the Solar System? There are 8 planets in our solar system. The planets orbit the Sun in elliptical trajectories, and they are all different in size, composition, ...

This story was updated at 1:54 p.m. ET. Two planets orbiting a star 950 light-years from Earth are the smallest, most Earth-size alien worlds known, astronomers announced today (Dec. 20). One of ...

This story was updated at 1:54 p.m. ET. Two planets orbiting a star 950 light-years from Earth are the smallest, most Earth-size alien worlds known, astronomers announced today (Dec. 20). One of ...

Kepler-37b is about 80 percent the size of Mercury and is the first exoplanet to be found that is smaller than any planet in our own solar system. Image released Feb. 20, 2013. (Image credit: NASA ...

Two planets orbiting a star 950 light-years from Earth are the smallest alien worlds known, astronomers announced Tuesday. One of the planets is actually smaller than Earth, scientists say. These ...

A large asteroid could be reclassified as a dwarf planet – which could make it the smallest in the solar system – after new research revealed its shape, astronomers said on Monday.