tests.pdf - 1 The age of the Solar System according to the...

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1 The age of the Solar System , according to the best astronomical evidence currently available, is about _____ years. A) 4.5 billion B) 6000 C) 40 million D) 1 billion E) 13.7 billion
2 How many stars are in the Solar System?
3 Pluto is currently classified by astronomers as a(n)
4 The mass of the Sun is about _____ the combined mass of all other objects in the Solar System.
5 Approximately how long would it take for a beam of light to travel 1,860,000 miles? A) 1/100 th second B) 1 second C) 10 seconds D) 100 seconds E) 1 hour
6 The nearest star to the planet Neptune is
7 The light from galaxies comes mostly from ____.
8 What shape most closely resembles the shape of our Milky Way Galaxy ?
9 Where in the Milky Way Galaxy does the Solar System reside? A) Quite close to the center B) Some distance from the center but still within the nucleus C) About 1000 ly from the center D) About two thirds of the way from the center to the edge E) Quite far above the disk, in the halo
10 The light of the Milky Way , visible on a clear, dark, moonless night, comes mostly from ____.
11 What is the approximate motion of the Solar System in the Galaxy?
12 The largest galaxy in the Local Group is
13 Which description below best fits a galaxy ? A) A system of material containing a star and numerous planets B) A very large group of millions or billions of planets C) A supermassive black hole with hundreds of stars orbiting about it. D) A very large group of millions or billions of stars and planets E) An enormous cloud of gas and dust with some stars and planets as well

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