Benchmark 10A
Historical Perspectives: Displacing the Earth from the Center of the Universe
Grades 6-8, page 240

Telescopes reveal that there are many more stars in the night sky than are evident to the unaided eye, the surface of the moon has many craters and mountains, the sun has dark spots, and Jupiter and some other planets have their own moons.

See Content Standard G History and Nature of Science (grades 9-12): Historical Perspectives.