The distance unit best for interstellar distances is the light-year. ___ The distance unit best for intergalactic distances is the mega-parsec. ___

The distance unit best for interstellar distances is the light-year. _ The distance unit best for intergalactic distances is the mega-parsec. _

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter19: Celestial Distances

Section: Chapter Questions

Problem 8E: Most distances in the Galaxy are measured in light-years instead of meters. Why do you think this is...

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Concept explainers

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.

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The distance unit best for interstellar distances is the light-year. ___

The distance unit best for intergalactic distances is the mega-parsec. ___

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