<http://schema.org/description>
"The field of astrophysics covers some of the biggest questions about the universe. How did it form? What will happen to it? How do solar systems form? What are stars made of? Is time travel possible? Test your smarts on astrophysics with this quiz."^^<http://www.w3.org/2001/XMLSchema#string>
<http://science.howstuffworks.com/astrophysics-quiz1.htm>