How do we determine the conditions that existed in the very early ...

[FButt]

How do we determine the conditions that existed in the very early universe?
 
  A) We can only guess at the conditions, since we have no way to calculate or observe what they were.
  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 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.

Question 2

Briefly describe how the solar wind affects magnetospheres and how auroras are produced.
 
  What will be an ideal response?

[kilada]

Answer to Question 1

C

Answer to Question 2

Some particles from the solar wind get channeled toward the poles; most of these particles collide with atoms and molecules in the atmosphere, causing them to create beautiful, often colorful auroras near the poles.

[FButt]

TYSM

[Kedrick2014]

Excellent