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.

Halley’s comet has an orbital period of 76 years, what is the average distance of Comet Halley from the Sun?

At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 60,000 K?

Kepler’s second law implies that

Parallax is