What did chris hadfield do important to Canada?

What is the mass of blue giant stars? What material is used for the outer layer of a space shuttle? What is epifocus? What was the name of the first Space rocket lunch by the Russians? What Planet that is one AU from the sun? What is in a hot air balloon to make it fly? How does the Moon's rotation influenced by its orbit around the Earth and Mercury's by its orbit around the Sun? Why did Da-a-fu go leave the village of moon rain with minli and dragon? How is temperature inversion like the tempuatures of the stratosphere and troposphere? What happens to a solar energy inside the greenhouse? What makes Mercury unique compared to other planets in our solar system? What does the surface of Ganymede look like? Even though the earth has Blank Mass than the sun the moon orbits earth because its much nearer to it? What is Jupiters highest and lowest temperature? When were heaven and earth created? What were Zeus quirks and flaws? Which is the most important planet? What extends upward about 6000 km? What would happen if someone had fallen off the moon? How did the rockettes get their name?