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Two stars that are in the same constellation |
may actually be very far away from each other |
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The north celestial pole is 35 degrees above your northern horizon this tells you that |
You are at latitude 35 N |
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Beijing, china and Philadelphia, PA, USA have about the same latitudes but very different longitudes. Therefore, tonight’s night sky in these two places |
Will look about the same |
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During the winter in the northern hemisphere, earth’s axis points toward the star Polaris. In the spring in the northern hemisphere, Earth’s axis |
Also points toward Polaris. |
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When it is summer in Australia, it is |
Winter in the United States |
|
If the Sun rises precisely due east, |
It must be the day of either the spring or fall equinox. |
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A week after full moon, the Moon’s phase is |
Third quarter. |
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The fact that we always see the same face of the Moon tells us that |
The Moon’s rotation period is the same as its orbital period. |
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If there is going to be a total lunar eclipse tonight, then you know that |
The Moon’s phase is full. |
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When we see Saturn going through a period of apparent retrograde motion, it means |
Earth is passing Saturn in its orbit, with both planets on the same side of the Sun |
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Why is the solar day longer than the sidereal day? |
Because the earth has moved in its orbit during the time of one rotation |
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The month is based on what celestial motion? |
The time it takes for the moon to complete one revolution around the Earth. |
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The time it takes for the Earth to complete one revolution around the sun with reference to the stars is called a/an |
Sidereal Year |
|
A sundial measures |
Apparent solar time |
|
Planets beyond earth will appear brightest when the are at |
opposition |
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