What is a protastar?

When did the song talking to the moon come out? What was the name of the spacecraft that was sent up in 1957? How does a rocket help space exploration? What year did the space shuttle blow up? What is the only space probe to be retreived and returned to earth? How many moons does Jupiter have as of 2012? Why are the Northern Lights only visible in the northern hemisphere? When is the sun at its highest point in britain? What do the big bang theory and the Hindu creation story have in common? What are Leo star names? What are all the planets with ring systems? Why would living on Mars be more dangerous than living on Earth? What best describes the motivation to pursue the Space Race? Where was whiteout invented? What does the stars in the circle mean on the EU flag? Do satellites have an engines? If you were standing on Saturn what would the sky look like? What time of the day is third quarter of the moon the highest in the sky? What angular resolution would you need to see the Sun and Jupiter as distinct points of light if you were looking at it from 15 light years away? How do you intensify your alcohol buzz?