The sky is flat, like a sheet of paper, and hence angular diameter is the distance measured along that flat sheet of paper.

If the change in wavelength is less than zero, then the radial velocity tells you that the star is moving _______________ you.

Which of the following is not visible during totality of a total solar eclipse?

At sunset, the ____ Moon phase will be highest above the southern horizon for an observer in the Northern Hemisphere.

The lowest of low tides occurs during neap tides.

Many classical Greek astronomers believed Earth could not move because they detected no parallax.

The equator receives the same amount of sunlight from season to season.

A portion or all of the same zodiac constellations can be seen by those in either hemisphere year round.

The reason why ancient astronomers thought that Earth could not be moving was because stars lacked any measurable parallax beyond one degree.

The ecliptic passes through the zodiac.