ParadoxDiff: Hard
Logic Breakdown
Passage Summary: Astronomers used to think some stars were older than the universe itself, which is impossible. A new theory suggests these stars are actually much farther away and brighter than we thought, which supposedly fixes the age contradiction.
Reasoning: Previous data suggested certain stars were older than the universe, but new estimates show these stars are further away and thus brighter than previously believed.
Analysis: The paradox here is the 'impossible scenario' of stars predating the universe. To resolve this, we need to understand how the astronomer's new data—specifically that the stars are farther and brighter—changes the calculation of their age. Look for an answer choice that provides a link between a star's intrinsic brightness and its estimated age. If higher brightness implies a younger age, the conflict disappears.
Reasoning: Previous data suggested certain stars were older than the universe, but new estimates show these stars are further away and thus brighter than previously believed.
Analysis: The paradox here is the 'impossible scenario' of stars predating the universe. To resolve this, we need to understand how the astronomer's new data—specifically that the stars are farther and brighter—changes the calculation of their age. Look for an answer choice that provides a link between a star's intrinsic brightness and its estimated age. If higher brightness implies a younger age, the conflict disappears.
Passage Stimulus
Passage Redacted
Unlock Full Passage20.Which one of the following, if true, most helps to explain why the astronomer's estimates of the stars' distances from Earth help resolve the earlier conflict between the ages of these stars and the age of the universe?
Correct Answer
C
If brighter stars are younger, then farther distance -> greater intrinsic brightness -> younger age. That directly explains how the new distance estimates resolve the original age conflict.
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