a trait that can help identify something

a chunk of rock in space that orbits the sun

a chunk of rock, dust, and ice with stretched out orbits around the sun

the four rocky planets closest to the sun

a large, round piece of rock and ice that revolves around a planet

the curved path of an object around a star, a planet, or a moon

the four large planets farthest from the sun that are made of ice and glass

the planets, asteroids, and comets that orbit the sun, as well as the planets' moons

a giant ball of hot, glowing matter