Details Title: Astronomy Test 1 Description: Ch. 1, 2, 3, 4, 5, Total Flash Cards: 11 Created: 09/17/2009 10:35:19		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 Put these in order from closed to you to farthest away. you, Earth, Local Group, Local Supercluster, solar system, Milky Way Definition d) you, Earth, solar system, Milky Way, Local Group, Local Supercluster Term Ecliptic plane Definition The path of the earth’s orbit about the Sun Term A tropical year is not the same as the a sidereal year due to what? Definition the precession of earth’s axis of rotation Term 29.5 days Definition Days in a synodic month. Term A solar day is longer than a sidereal day due to what? Definition Earth’s rotation about the Sun Term 3600 arcseconds Definition Amount of arcseconds in a degree Term 60 arcminutes Definition Amount of arcminutes in a degree Term Parallax Definition The apparent displacement of a foreground object relative to the background due to changes in observer’s position Term The Horizon Definition The boundary between the earth and the sky Term 12 or 13 constellations Definition Amount of constellations in the zodiac Term The gravitational force of the Moon Definition Cause of Earth’s precession (the slow movement of the axis of a spinning body around another axis due to a torque acting to change the direction of the first axis.)