Rank the following 4 items by how long it takes for light to reach us from these
object, from shortest to longest.
The Andromeda Galaxy
the center of the Milky Way
Pluto
Sun.
Ans- Sun, Pluto, center of the Milky Way, the Andromeda Galaxy.
The current best estimate for the age of the univer...
MSU ISP 205 Final Exam Questions and Answers Rank the following 4 items by how long it takes for light to reach us from these object, from shortest to longest. The Andromeda Galaxy the center of the Milky Way Pluto Sun. Ans- Sun, Pluto, center of the Milky Way, the Andromeda Galaxy. The current best estimate for the age of the universe is about Ans- 14 billion years. What do astronomers mean when they say the universe is expanding? Ans- Average distances are increasing between most galaxies. Which statement is false? 1. A const ellation demarcates a patch of sky, making it easier for astronomers to locate interesting sources. 2. Modern -day constellations include Musca the Fly and Triangulum the Triangle. 3. There are 88 constellations, as defined by the International Astronomic al Union. 4. Practically every ancient culture had their own version of constellations, typically used for story telling. Ans- 1 Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In that case, Ans- We are seeing Gala xy 1 as it looked at an earlier time in the history of the universe than Galaxy 2 Identify the falsifiable statement below: 1. President Kennedy's murder was orchestrated by an undetectable shadow government of the United States. 2. The laws of nature a re magnificent and beautiful. 3. The Sun is at the center of the solar system. 4. The universe was created by God. Ans- 3 The Greeks rejected the notion that the Earth orbits the Sun. Why? Ans- They could not measure parallax (a change in stars' positions on the sky due to the Earth's orbit) What did Tycho, Kepler, and Newton do? Ans- Tycho collected the data, Kepler provided the model in the form of laws, Newton explained the model in terms o f gravity. Galileo observed all of the following. Which observation offered direct proof of a planet orbiting the Sun? Ans- phases of Venus.
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