The Moon physically changes its shape throughout its orbit around the Earth giving us the phases of the Moon we see.

The star Vega has an apparent visual magnitude of 0.03 and the star HR 4374 has an apparent visual magnitude of 4.87. It has been determined that both stars are at the same distance from Earth. What does this information tell us about the two stars?

The ecliptic can be defined as

Copernicus proposed that Earth moved around the Sun.

The full Moon is brighter than Venus regardless of how bright Venus is in the sky on any night as viewed from Earth.

A solar eclipse that occurs when the Moon’s umbra does not reach Earth’s surface is called

As seen from the Earth’s southern hemisphere, the celestial equator passes

Earth’s rotation axis is approaching Polaris today.

Newton’s law of gravitational force is expressed as follows:

In one way of naming stars, a(n) ____ letter indicates its brightness relative to the other stars in the constellation.