For the Week ending 07/16/08
Directions: Choose the word that matches with the definition and appropriately fits into the blank space in the sentence.
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apparent displacement of star due to Earth's orbit and bending of star's light rays
The annual _______ is the correction for an imaginary observer at the Earth's center. |
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point in elliptical orbit of planet or comet that is farthest from sun
The comets and Vulcan have roughly the same _______, or farthest distance from the Sun. |
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luminous area that surrounds sun as seen through thin cloud; corona
Coronae have an intensely bright central _______ which is almost white and fringed with yellows and reds. |
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shift in spectral lines of an object toward longer wavelengths at red end of spectrum as it recedes from Earth, with amount of shift proportional to object's speed. (thought to be a Doppler effect explaining an expanding universe)
Many _______ surveys are being undertaken to gain an understanding of the geometry of the Universe in three spatial dimensions. |
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outside the Milky Way system
High-frequency _______ sky surveys are expected to have a major impact on astrophysics. |