How long to cycle 15km?

What caused the space race? What is one astronomical unit approximately equal to? What is the name of star next to the moon? When we see the moon as a perfect circle it is called what? In the universe what is the red shift? What are the characters with small bodies and big heads called? How many stars in constellation Andromeda? Why is the moon positioned on the wrong side of the sky? What did astronauts eat during the mercury project? What outer planet is closest to the sun? How did the space start? How does the space station propelled its self? What happens when the outer core of a star explodes after the core collapses? Who wrote about liquid propelled rockets? What is sunlight reflected from the earth to the moon and back called? How much money is spent on space exploration each year? Which scientist determined the nature of the forces that keep the planets in their orbits? What feature is produced when a stalagmite and stalagtite meet? Did atom and eve get put on earth at the same time? What did NASA do right after the accident on Apollo 13?