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

question 42

Multiple Choice

The Milky Way Galaxy is moving at about 600 km/s relative to the cosmic microwave background. How does this compare to Earth's speed in its orbit and to the speed of the solar system in its orbit around the galactic center?

• A) This speed is less than both the speed of the solar system and Earth's orbital speed.
• B) This speed is greater than Earth's orbital speed but less than the solar system's speed.
• C) This speed is greater than the solar system's speed but less than Earth's speed in its orbit.
• D) This speed is greater than both Earth's speed in its orbit and the solar system's speed.

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