A Close Quasar Pair Raises a Growth Puzzle
The observation looks back to the early universe.
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a to a . with the .
The is 900 the . Its were , of .
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Try 2 questions about this story, then explain one idea in your own words. Check the text whenever you need to.
In this lesson: Connect survey discovery to follow-up observation and the resulting growth question.
Grammar in this story: Already connects a state to an early time
were already extremely massive
Already stresses that the great masses had been reached by that early stage. It does not describe a future prediction.
Your turn
Describe the two observational steps and the scientific question they leave.
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Webb data revealed a companion, and Gemini North follow-up observations separated the two objects. Their black holes were already extremely massive about 900 million years after the Big Bang, leaving a question about how such rapid growth occurred.
Your answer can be different. Give a reason and use your own words.
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