00:01
Question 30 is asking why it's better to put telescopes in space to get a picture of the radiation left over from the big bang.
00:09
Well, a big piece of evidence for the presence of the big bang is the cosmic microwave background, also called the cmb.
00:25
Now, this background radiation was found by two scientists working at bell laboratories, and they interpreted it as radiation left over from the big bang.
00:44
During this early period of time, the universe was much hotter, and there were free protons and electrons.
00:55
Running around and we believe this radiation comes as evidence for that.
01:03
Now, microwaves are among the forms of radiation that are not able to fully make it through earth's atmosphere.
01:15
If you remember our little graph, i'm going to only draw a part of it here and show you...