The correct answer is between 300,000 and 400,000 km/s.
When two galaxies are moving away from each other, their relative velocity is the sum of their individual velocities. In this case, since each galaxy has a velocity of 200,000 km/s relative to Earth, the relative velocity between the galaxies would be 200,000 + 200,000 = 400,000 km/s.
Two galaxies on opposite ends of the universe are moving away from the Earth. Each has a velocity of 200,000 km/s relative to the Earth. How fast would an observer in one of those galaxies see the other galaxy moving away? (1 point) Responses 400,000 km/s 400,000 km/s 200,000 km/s 200,000 km/s between 300,000 and 400,000 km/s between 300,000 and 400,000 km/s between 200,000 and 300,000 km/s
1 answer
1 answer