The Milky Way Galaxy Is Moving at About 600 Km/s

question 30

Multiple Choice

The Milky Way Galaxy is moving at about 600 km/s relative to the cosmic microwave background radiation.Why?

• A) The Milky Way is being attracted by several nearby superclusters of galaxies.
• B) This speed is the orbital speed of the Local Group of galaxies around the Virgo cluster.
• C) There is no particular reason. All galaxies have "small" random speeds in addition to the universal expansion, and 600 km/s is the speed of the Milky Way.
• D) This speed is the orbital speed of the Milky Way Galaxy around the Andromeda Galaxy.

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Definitions:

Mixed Numbers

Numbers consisting of an integer and a proper fraction, representing sums of whole numbers and fractions.

Improper Fractions

Fractions where the numerator is greater than or equal to the denominator, representing a value of one or more.

Lowest Terms

The simplest form of a fraction, where the numerator and the denominator are reduced to their smallest whole numbers.

Quarts

A unit of volume in the U.S. customary and the British imperial systems, equal to a quarter of a gallon, or approximately 0.946 liters.