Blog

An observer on Earth’s equator would find _______

The observed amount of difference between the perihelion of Earth in early January and aphelion in early July results in the northern hemisphere being _____.

The semimajor axis of an ellipse is

What is the order of star colors with increasing temperature?

Earth doesn’t experience a solar eclipse every month because

Long wavelength visible light

Saturn orbits the Sun and follows which laws? Choose the best answer. I. Kepler’s first II. Kepler’s second III. Kepler’s third IV. Newton’s law of gravitation  

If the Sun passes directly overhead on at least one day per year, then

What is a blackbody?

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