How Do We Determine the Conditions That Existed in the Very

question 73

Multiple Choice

How do we determine the conditions that existed in the very early universe?

• A)We look all the way to the cosmological horizon,where we can see the actual conditions that prevailed all the way back to the first instant of the Big Bang.
• B)The conditions in the very early universe must have been much like those found in stars today,so we learn about them by studying stars.
• C)We work backward from current conditions to calculate what temperatures and densities must have been when the observable universe was much smaller in size.
• D)We can only guess at the conditions,since we have no way to calculate or observe what they were.

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