What was so important about Kepler’s 3rd law?

What is most of the mass in our galaxy?

What is luminosity measured in?    

As the universe cooled, it went from being _________________ to being __________________.

Which luminosity class is the brightest?

A common misconception is that black holes go sucking up “stuff”. Why is this false?

What were the results from the Sloan Digital Sky Survey?

Which best describes the legislative system in France relative to the executive?

Maquiladoras are:

Descendants of Dutch, French, and German colonists who arrived in the seventeenth century developed their own language called: