Astronomy Homeowrk: Celestial Motion

A. Zero seconds. His reply was immediate. B. Less than 0.1 seconds    C. Approximately 1 second D. Over 2 seconds

(Image Credit: Ashley Dace) You watch a bright star rotate 120° around the north celestial pole. How long have you been watching this star?

A. 2 hours B. 4 hours    C. 8 hours D. 16 hours

You watch the constellation Orion rise above the horizon at 2 AM. At what time will you have to go out to watch it rise two months later?

A. 10 PM B. 12 AM    C. 2 AM D. 4 AM E. 6 AM

Select all that apply. It is hotter in summer and colder in winter because:

A. Earth is closer to the sun in summer. B. Earth's orbit around the sun is elliptical.C. Your hemisphere of Earth is tipped toward the sun in summer.

The sun at midday is the lowest in the sky on the:

A. Vernal equinox B. Summer solstice    C. Autumnal equinox D. Winter solstice

The day is 12 hours long and the night is 12 hours long:

A. Always B. On the summer and winter solstices    C. On the vernal and autumnal equinoxes D. On the longest and shortest days of the year

Select the best answer. In 26,000 years:

A. Polaris will no longer be the pole star. B. Polaris will be the pole star.    C. Does not matter because Polaris will always be the pole star. D. Does not matter because there will always be a bright star near the north celestial pole.

Which of the following statements is true?

A. When solar eclipses occur, the moon is full. B. When lunar eclipses occur, the moon is full.    D. When the moon is full, solar eclipses occur. C. When the moon is full, lunar eclipses occur.

Since the line of nodes regresses:

A. There are ≈18 eclipses every 9 tropical years. B. There are ≈18 eclipse seasons every 9 tropical years.    C. There are ≈17 eclipse seasons every 9 tropical years. D. There are ≈19 eclipse seasons every 9 tropical years.

Every Saros cycle (19 eclipse years):

A. All total solar eclipses reoccur as total solar eclipses. B. All annular solar eclipses reoccur as annular solar eclipses.    C. All solar eclipses reoccur at the same longitudes and latitudes. D. All lunar eclipses reoccur.

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