Why is a light-year a more useful measurement in astronomy than a meter is?

In 2009, roughly of people age 12 or older who did not drink alcohol were current users of illegal drugs. a. 4% b. 10% c. 13% d. 20%

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Abdid is an astronomer who has been observing objects that orbit the sun in the asteroid belt. he finds a previously undiscovered round, rocky object that is not similar in shape to the rest of the asteroids. what has abdid most likely found?