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The Essential Cosmic Perspective Study Set 1

Physics & Astronomy

Quiz 1 :

A Modern View of the Universe

Quiz 1 :

A Modern View of the Universe

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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). How far is 1 light- hour?
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Answer:

B

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A television advertisement claiming that a product is light- years ahead of its time does not make sense because .
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Answer:

B

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On the scale of the cosmic calendar, in which the history of the universe is compressed to 1 year, how long has human civilization (i.e., since ancient Egypt)existed?
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Answer:

A

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What is the diameter of the galaxy, in km?
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An astronomical unit (AU)is .
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Which of the following is not a general difference between a planet and a star?
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The farthest bright galaxies that modern telescopes are capable of seeing are up to
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Rank the following 4 items by how long it takes for light to reach us from these objects, from shortest to longest.
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Astronomers infer that the universe is expanding because distant galaxies all appear to .
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The term observable universe refers to .
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The number of stars in the Milky Way Galaxy is approximately .
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Earth is made mostly of metals and rocks. Where did this material come from?
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How do the speeds at which we are moving with Earth's rotation and orbit compare to the speeds of more familiar objects?
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Relative to the age of the universe, how old is our solar system?
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From the fact that virtually every galaxy is moving away from us and more distant galaxies are moving away from us at a faster rate than closer ones, we conclude that
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One light- year is the distance light travels in one year. The speed of light is about 300,000 km/s (3 × 105 km/s). How far is 1 light- year?
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Suppose we imagine the Sun to be about the size of a grapefruit (about 10 cm across). Which of the following describes the size and distance of Earth on the same scale?
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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?
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On the 1- to- 10- billion scale, about how far is it to the nearest stars besides the Sun?
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If we use 1 millimeter to represent 1 light- year, how large in diameter is the Milky Way Galaxy?
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