In the Northern Hemisphere, the sunlight moves from right to left across the surface of the Moon during the waxing phases.

Earth’s atmosphere is fully transparent only to visible and radio light.

An observer at Earth’s geographic north pole would find _______

All the constellations in the sky were created by the Greeks.

Cosmic rays are electromagnetic radiation.

Newton concluded that a force from the Earth had to act on the Moon because

Ancient astronomers thought the heavens were perfect circles, spheres, and unblemished.

A lunar eclipse that occurs when the Moon moves completely into Earth’s umbral shadow is called

Star A has an apparent visual magnitude of 13.4 and star B has an apparent visual magnitude of 15.4. Star A is ____ than star B.

Ptolemy’s model of the universe