AST 111 - Test 1 Study Guide || with 100% Accurate Solutions.

The Milky Way resides in the Local Group of galaxies. correct answers True The two nearest planets to the Earth are ... correct answers Venus and Mars A solar eclipse can only occur when the Moon is in the ______ phase. correct answers New How old is the Sun? correct answers Near 5 billion yr Why is it warmer in summer for Northern Hemisphere residents than in winter? correct answers Earth's rotation axis is tilted orienting the Northern Hemisphere toward the Sun, and thus the Sun heats the ground more directly and for a longer time. Declination on the celestial sphere is similar to this coordinate which describes a location on Earth: correct answers latitude The constellations ... correct answers are 88 in number and cover the entire sky. 0.0000003 in scientific notation is ________. correct answers 3×10 -7 A science fiction writer describes inhabitants on Earth in 4000 AD traveling north using Polaris. What is wrong with this scenario? correct answers Polaris will no longer be close to due north, because of Earth's precession (i.e., Earth undergoes a motion like a spinning top). Students are given 3 attempts for these learning module quizzes (highest grade is registered). correct answers True Importantly, Tycho Brahe ... correct answers made accurate measurements of planetary positions, which Kepler later used to help conclude that orbits are elliptical. Importantly, Johannes Kepler ... correct answers discovered that planetary orbits are ellipses rather than circles. The Julian and Gregorian calendars did not possess a leap year. correct answers False The constellation that hosts the North Star (Polaris) is designated ... correct answers Ursa Minor, the little bear and dipper. What does "epicycle" refer to in Ptolemy's geocentric model? correct answers It is the smaller circle that a planet orbits, and the center of that circle orbits around Earth (deferent). The early Copernican system for planetary motions is ... correct answers Sun-centered (heliocentric), with planets moving in circular orbits.