Stars and galaxies - Study guides, Class notes & Summaries

Explain why we see objects at great distances as they were in the distant past Ans- -The universe is constantly expanding -an observer in any galaxy sees more distant galaxies moving away faster -Distances and speeds help determine the universe is expanding Summarize the major cosmic events that prepared the way for life on Earth Ans- -Big Bang created matter -Gravity pulled that matter together to form galaxies -Galaxies created stars alongside nuclear fusion -Stars created elements nec...

AST 101 Rio Salado Mid-Term: Multiple Choice & Essay Questions and Answers Already Passed What is the main difference between a planet and a star? A planet orbits a star and does not produce its own light, while a star generates its own light and energy through nuclear fusion. What causes the phases of the Moon? The phases of the Moon are caused by the changing angles from which we view the Moon’s illuminated half as it orbits Earth. What is the significance of the Hubble Sp...

How old is the universe? correct answer: 14 billion years old How many kilometers make up a light year? correct answer: 10 trillion kilometers or 10 x 10^12 How many galaxies are present in the Local Group? correct answer: 40 Is there ever a time when we, on the Earth, are not in some type of motion? correct answer: no How far away are the nearest stars, excluding the Sun? correct answer: at least 4 light years away The elements hydrogen and helium were created during the Big...

TABLE OF CONTENTS: Preview: The Cosmic Landscape Chapter 1: The Cycles o f the Sky Chapter 2: The Rise of Astronomy Essay 1: Backyard Astronomy Chapter 3: Gravity and Motion Chapter 4: Light and Atoms Essay 2: Special and General Relativity Chapter 5: Telescopes Chapter 6: Earth Chapter 7: The Moon and Tides Essay 3: Keeping Time Chapter 8: The Terrestrial Planets Chapter 9: The Giant Planets Chapter 10: Small Bodies Orbiting the Sun Chapter 11: Planetary Systems Essay 4: Life in the Universe Ch...

Aristotle believed that .... A. the Earth rotated around the Sun B. the Sun rotated around the Earth C. the Sun and the Earth rotated around a common gravity spot D. the Earth and Sun both stand still correct answers B. Buffon thought the world was about __________ years old. 1000 7500 75,000 7,500,000,000 correct answers C. The "Father of Modern Geology" is .... A. Strabo B. Steno C. Lyell D. Hutton correct answers D. Venus is a _____________. Gas Giant Terrestri...

AU-astronomical unit Correct Answer-Earth's average distance from the sun. Used to describe distance within the solar system Light Year- ly Correct Answer-Distance light can travel. which is about 10 trillion km. Used to describe distance of stars and galaxies. measure of distance not time. Solar system Correct Answer-consists of sun,planets, and their moons; which is held together by a common center. Local Group Correct Answer-more than 70 galaxies put together galaxy clusters Corr...

A lightyear is the distance that _________ can travel in one _____ correct answers light, year How many km in a lightyear? correct answers 9.50 x 10^12 km How many KM in an AU correct answers 1.5 x 10^8 How many AU in a lightyear correct answers 63,000 AU Earth is a planet while the Sun is a________ correct answers Star Solar System correct answers consists of the sun, the planets, and some smaller bodies such as moon, asteroids, and comets - one planetary system Name the plane...

Complete Test Bank (with Questions Answers)

Light year definition correct answers The distance light travels in one year Light year distance correct answers 9.5*10^12 km Astronomical Unit (AU) definition correct answers Average distance from the Earth to the Sun AU distance correct answers 1.5*10^8 km Galaxy correct answers A great cloud of stars, gas, and dust held together by the combined gravity of all its matter Planetary Systems correct answers A set of gravitationally bound non-stellar objects in orbit around a star o...

Solutions Manual for The Cosmic Perspective, 10e 10th Edition by Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider | Complete Study Guide with all chapters (Chapter 1 - 24) included. A Modern View of the Universe Discovering the Universe for Yourself The Science of Astronomy S1. Celestial Timekeeping and Navigation Making Sense of the Universe: Understanding Motion, Energy, and Gravity Light and Matter: Reading Messages from the Cosmos Telescopes: Portals of Discovery Our Planet...