Learn basic facts about the solar system. Use the word bank to fill in the blanks The sun is the center of the solar system. It is the closest The planet closest to the sun is Mercury is a heavy planet made mostly of iron is the second planet from the sun This planet has very thick clouds. Earth is the planet from the sun Earth is the only planet that has on it, as far as we know is known as the "Red Planet" and has always interested scientists. Mars has two is in between the inner and outer planets. The largest planet in The our solar system is and it has faint The second largest gas giant is and it is the lightest planet we know of spins on its side and is called the "ice giant" because it is so cold The smallest of the four gas giants is It has six rings and 13 moons is smaller than 7 moons in the solar system. It is classified as a planet Word Bank Earth Asteroid Belt Uranus Mors Saturn Pluto Star Third SUN Neptune Mercury Jupiter Venus life moons rings Copyright 2017 Save Publishing the www.instant​