Author: Anonymous

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

The law of gravitation is termed universal because it is a property of all material objects.

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

A solar eclipse that occurs when the Moon’s umbra reaches Earth’s surface is called

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

The gibbous Moon is never visible in the daytime sky.

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

A scientific model is a mental conception that provides a framework that helps us think about some aspect of nature.

Earth’s rotation axis is approaching Polaris today.