Quasar Pair Tests Ideas About Early Cosmic Growth
Resolving two objects does not explain their rapid growth.
Loading your learning…
Beginner support · Translation help
Read with help in your language
Choose a language to see each paragraph translated below the English. Tap highlighted words for a quick meaning.
a in and its . The are as they were 900 the .
Their had at that . The of , but the have not a of the so .
Read · Think · Practise
Try this story
Try 2 questions about this story, then explain one idea in your own words. Check the text whenever you need to.
In this lesson: Distinguish a resolved observation from a definitive explanation of formation.
Grammar in this story: But limits a scientific conclusion
constrains models of rapid growth, but
Constrains means limits the models that could fit the observation. But prevents confusing that evidence with a complete explanation.
Your turn
Explain the evidence and its limit without describing the pair as observed in its present state.
See one possible answer
The compact pair was identified in Webb data and resolved with Gemini North as it appeared roughly 900 million years after the Big Bang. Its enormous early masses constrain growth models, but the researchers have not established a definitive explanation of how it became so massive.
Your answer can be different. Give a reason and use your own words.
0 of 2 questions checked.
Tell us what helped or felt difficult
Which reading level did you try? Was a sentence unclear? Did the questions help you understand the story?
Send feedback by email