Scientists Indicate That the First Stars Probably Formed at a Redshift

question 58

Multiple Choice

Scientists indicate that the first stars probably formed at a redshift z ~ 20.At that time the universe was about

• A) 5 percent its current size.
• B) 50 percent of Earth's size.
• C) as big as an atom.
• D) about 100 AU across.
• E) the size of a grapefruit.

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