Which statement best describes evidence of the Big Bang Theory?

What were the first two elements to form once the Universe expanded and cooled?

What are some important pieces of evidence we have for the Big Bang?

Which of the following characteristic describe the luminosity of a star?

What is the color of the mid range stars?

What is the most useful tool in determining the characteristics of stars?

What does the color of a star tell you?

Which star color is the hottest?

Another word for magnitude is ___.