Asteroids.
The celestial bodies between Mars and Jupiter are known as asteroids. These rocky objects orbit the Sun in the asteroid belt, located between the orbits of Mars and Jupiter. Thousands of asteroids have been identified in this region, ranging in size from large boulders to small planetoids.
You're describing an attribute of the asteroids.
The assorted rocks in the asteroid belt, which orbits the sun roughly between the orbits of Mars and Jupiter, have large numbers of members with diameters between 1 and 500 miles. We might further speculate that the Oort cloud also contains many similar space rocks, but no one knows. If you'd like to investigate further, use the links below.
Those are "asteroids". The region is collectively known as the Main Asteroid Belt. However, the Asteroid Belt is in no sense the way movies portray it. You would not be dodging thousands of asteroids, all moving in a variety of directions. You could throw a moon through the asteroid belt with little danger.
any of thousands of small celestial bodies that revolve about the sun in orbits chiefly between those of mars and jupiter ranging in diameter from one mile to 480 miles
The asteroid belt can be found located between Jupiter and Mars. It contains a large number of irregularly shaped celestial bodies.
The asteroid belt is what is between the orbits of Mars and Jupiter.
The asteroid belt.
The term you are looking for is "asteroid belt." It is a region in the solar system that is mostly located between the orbits of Mars and Jupiter and is home to numerous small celestial objects called asteroids.
Including the space, it is "Asteroid Belt".
The asteroid belt is located between the orbits of Mars and Jupiter.