All the Asteroids Together Weigh Less Than the Moon

Pictures of the asteroid belt can make it look like a crowded field of giant rocks. The numbers say otherwise. NASA states that the total mass of all the asteroids combined is less than that of Earth’s Moon. Most asteroids orbit the Sun between Mars and Jupiter, within the main asteroid belt. They vary a great deal in size. According to NASA, they range from Vesta, the largest asteroid at about 329 miles, or 530 kilometers, in diameter, to much smaller asteroids that are less than 33 feet, or 10 meters, across. Some even have company. NASA notes that more than 150 asteroids are known to have small companion moons of their own.