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.

Question

Quizplus · Accepted Answer

By working backward from current conditions and using mathematical models, scientists can calculate what temperatures and densities would have been in the very early universe when it was much smaller in size. They then compare these calculations to observations and measurements made by telescopes and satellites to refine their understanding of the early universe.

How Do We Determine the Conditions That Existed in the Very