At any point in its orbit, exactly one half of the Moon is illuminated by the Sun.

If the period of a body’s orbit is doubled, then the distance from the host has ___________. Assume the units of period are years and the units of distance are A.U. Choose the best answer.

As Earth rotates, circumpolar stars appear to move counterclockwise around the north celestial pole.

If you are standing on the floor then your action (or lack of action) can count as a test of

The total amount of illumination changes during the lunar cycle of phases.

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

Astronomy is pseudoscience.

Cosmic rays are electromagnetic radiation.

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