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StudyGuide for Astronomy Midterm

StudyGuide for Astronomy Midterm - StudyGuide for Astronomy...

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StudyGuide for Astronomy Midterm 1- In modern astronomy, a constellation is an internationally defined area of the celestial sphere.
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a.
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2- Celestial Sphere- An imaginary sphere of infinite extent with the earth at its center on which the stars, planets, and other heavenly bodies appear to be located. a. Celestial Equator- The celestial equator is a great circle on the imaginary celestial sphere , in the same plane as the Earth 's equator b. Celestial Poles- The north and south celestial poles are the two imaginary points in the sky where the Earth's axis of rotation , indefinitely extended, intersects the imaginary rotating sphere of stars called the celestial sphere . c. Ecliptic- The ecliptic is the apparent path that the Sun traces out in the sky during the year, appearing to move eastwards on an imaginary spherical surface, the celestial sphere , relative to the (almost) fixed stars. In more accurate terms, it is the intersection of the celestial sphere with the ecliptic plane , which is the geometric plane containing the mean orbit of the Earth around the Sun .
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