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Suppose you use the Southern Cross to determine that the south celestial pole appears 40 degrees above your horizon. Then you must be located at _________.
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Latitude 40 degrees south
-The altitude of the south celestial pole is equal to your latitude; because you see the south celestial pole at altitude 40 degrees, you must be located at latitude 40 degrees south. |
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Suppose you are facing north and you see the Big Dipper close to your northern horizon, with Polaris (and the Little Dipper) above it. Where will you see the Big Dipper in six hours?
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To the right of Polaris; that is, 90 degrees counterclockwise from its current position.
-Facing north, the sky appears to turn counterclockwise. In 6 hours, the sky will turn ΒΌ of the way around a full circle, so all stars will appear to have moved 90 degrees counterclockwise around the north celestial pole. |
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In any particular place on Earth, certain constellations are visible in the evening only at certain times of the year because _________.
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Our evening view of space depends on where Earth is located in its orbit around the Sun
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The Sun's path, as viewed from the equator, is highest in the sky on _________.
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The spring and fall equinoxes
-at the equator, the Sun passes through the Zenith just twice each year, at noon on the spring and fall equinoxs |
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Suppose Earth's axis tilt was significantly greater than its current 23.5 degrees, but Earth's rotation period and orbital period were unchanged. Which statement below would not be true?
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The length of each season (for example, the number of days from the summer solstice to the fall equinox) would be significantly longer than it is now.
-the length of the seasons would be unaffected, because this is determined by Earth's orbital period. |
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If our year were twice as long (that is, if Earth took twice as many days to complete each orbit around the Sun), but Earth's rotation period and axis tilt were unchanged, then _________.
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The four seasons would each be twice as long as they are now
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