Details Title: Chapter 3 Description: about astronomy, chapter 3 Total Flash Cards: 27 Created: 02/11/2009 16:17:10		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Astronomy Flashcards
Cards in this set: Term What is a sidereal period? Definition The time it takes to reach the same position relative to the stars. Term What is the moon's sidereal period? Definition 27.5 days Term What is a synodic period? Definition time to reach the same position relative to the sun Term What is the moon's synodic period? Definition 29.53 days Term What is the chief factor behind the difference of the moon's synodic period and sidereal period? Definition Different positions because synodic refers to the sun and sidereal refers to the stars Term The waxing phases of the moon be seen...? Definition in the evening sky Term List the phases of the moon in order, starting with the New moon Definition 1. New 2. Waxing crescent 3. first quarter 4. Waxing gibbeous 5. Full 6. Wanning gibbeous 7. third quarter 8. Wanning crescent Term The moon rises in the _____ and sets in the _____ Definition rises in the east sets in the west Term Motion of the night to night is (same or opposite) of the moon one night? Definition opposite Term Why is it opposite? Definition Moon's orbit is slower than earth's rotation Term The waning phases of the moon can be seen in the _______ Definition morning sky Term The moon rotates with the same _____ as it _____ the earth. Definition period orbits Term We always see the same side of the moon, true or false? Definition True Term What is the zone of partial shadow called? Definition Penumbra Term What is the zone of total shadow called? Definition umbra Term What kind of eclipse do we see if the entire surface of the moon passes through the earth's umbra? Definition Total lunar eclipse Term Why does the earth have a faint red glow during a total lunar eclipse? Definition because it's reflecting sunlight scattered in the earth's atmosphere Term True or False: The sun and moon appear exactly the same size in the sky. Definition true Term What kind of eclipse occurs if the moon passes in front of the sun? Definition Total solar eclipse Term A viewer standing in the umbra of the shadow will see what kind of eclipse? Definition Total solar eclipse Term What is the earth's position closest to the sun called? Definition Perihelion Term What's the earth's position farthest from the sun called? Definition Aphelion Term what is the moons position closest to earth called? Definition Perigee Term what is the moon's position farthest from earth called? Definition Apogee Term When does an annular solar eclipse occur? Definition when earth is near perihelion and the moon is near apogee Term Solar eclipses occur during which moon phase? Definition New Moon Phase Term Lunar eclipses occur during which moon phase? Definition full moon phase