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Cards In This Set
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What is the Astronomical Unit?
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The average distance from the Earth to the Sun
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The apparent motion of the planets is in a narrow band on the cellestial plane called _______.
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Zodiac
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Which term matches best with year?
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Period of revolution
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Which unit of measure best represents the Earth's axial tilt?
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23.5 degrees
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What time is it when the Sun's position is on the equator?
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Equinoxes
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What time is it when the Sun's position is on the ecliptic?
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Always
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The light year is a unit of...
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Distance
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When your eye is dark adapted...
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Both (B) and (D)
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Which of the following lists Electromagnetic Waves in increasing order of wavelenghts?
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X-rays, Ultraviolet, Visible Light, Infrared, Radio Waves
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A star moving away from the Earth at high speed will show:
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Red shifted spectral lines
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Satr X is 6000 K and appears yellow. Star Y appears red. What can we conclude about star Y?
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Its surface temperature is lower than 6000 K
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How do we know that the Sun contains hydrogen?
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Because the Sun's spectrum contains absorption lines that match the spectrum of hydrogen.
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Which of the following quantanties is most crucial in terms of the quality of a telescope?
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Diameter of mirror/lens
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Which of the following telescopes would not be suitable for ground-base observations:
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Only X-ray telescope and ultraviolet telescope would not be suitable
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Which of the following is a significant advantage of the Hubble Telescope compared to the Kitt Peak observatory?
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The HST is not affected by atmospheric scintillation
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