Benchmark 4A
The Physical Setting: The Universe
Grades 3-5, page 63

Telescopes magnify the appearance of some distant objects in the sky, including the moon and the planets. The number of stars that can be seen through telescopes is dramatically greater than can be seen by the unaided eye.

NSES Content Standard E 
Science and Technology: Understanding about science and technology 
Grades K-4, page 138 
Tools help scientists make better observations, measurements, and equipment for investigations. They help scientists see, measure, and do things that they could not otherwise see, measure, and do.