Astronomy assign

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The farthest galaxies that modern telescopes are capable of seeing are up to _______ A) 10 billion light-years away. B) 1 trillion light-years away. C) 1 billion light-years away. D) 10 million light-years away. E) 5 billion light-years away. 2) Where is our solar system located within the Milky Way Galaxy? A) in the halo of the galaxy B) at the far edge of the galaxy's visible disk C) roughly halfway between the center and the edge of the visible disk of the galaxy D) very near the center of the galaxy 3) If the entire galaxy (with a diameter of 100,000 light-years) were represented by a circle with a diameter of 4,400 km (similar to the width of the continental United States), then how far apart would be the Sun and its nearest stellar neighbor, Proxima Centauri (which is 4.2 light-years away)? A) about 0.2 meters (about the length of an adult's forearm) B) about 20 meters (about the size of a large classroom) C) about 2 meters (about 2 long footsteps) D) about 200 meters (about 2 football fields) 4) One light-hour is the distance light travels in one hour. The speed of light is about 300,000 km/s (3 × 105 km/s). If Jupiter is 0.72 light hours from the Sun, how far is this? A) 778 million km (7.78 × 108 km) B) 216 thousand km (2.15 × 105 km) C) 1.5 billion km (1.5 × 109 km) D) 13 million km (1.3 × 107 km) 5) The universe is defined as _______ A) the entire Milky Way Galaxy. B) all the stars and galaxies that we can see with telescopes. C) all the objects we can see and the space between them. D) all material, space, and energy that exist: everything. 6) Which of the following has your "cosmic address" in the correct order? A) you, Earth, solar system, Local Group, Milky Way Galaxy, Local Supercluster B) you, Earth, solar system, Local Group, Local Supercluster, Milky Way Galaxy C) you, Earth, solar system, Milky Way Galaxy, Local Group, Local Supercluster 7) Suppose we imagine the Sun to be about the size of a grapefruit. How big an area would the orbits of the eight planets of the solar system cover? A) the size of a small city B) the size of a typical college campus C) the size of a small room

D) the size of a building E) the size of a western state (e.g., Colorado) 8) What is the Sun mainly made of? A) hydrogen and helium B) nearly equal portions of all the elements C) hydrogen and oxygen D) oxygen and carbon E) carbon and nitrogen 9) Which of the following best describes the Milky Way Galaxy? A) a spherically shaped collection of about 1 million stars that is about 100 light-years in diameter B) a spherically shaped collection of stars, including our solar system and about a dozen other solar systems, stretching about 4 light-years in diameter C) a disk-shaped galaxy about 50,000 light-years in radius and containing between 100 billion and 1 trillion stars D) a disk-shaped galaxy about 50,000 light-years in diameter and containing between 100 million and 1 billion stars E) a disk-shaped galaxy about 100,000 light-years in diameter and containing between 100 million and 1 billion stars 10) The distance of Mars from the Sun is about 1.5 AU. How far is this in kilometers? A) 1.5 × 150,000,000 km B) 1.5 × 150,000,000,000 km C) 150,000,000 / 1.5 km D) 150,000,000,000 / 1.5 km