Explain why astronomers use astronomical units and light years instead of miles or kilometers. Give one specific example each for astronomical units and light years used in astronomy.
What are some of the differences between how the ancients (e.g. Aristotle) viewed Earth and the cosmos versus post-Galileo views?
Rank the following in order of greatest size to smallest size: AU, light year, galaxy, universe, planet, Sun-like star, cluster of galaxies, comet
What are the steps of the scientific method? Why is it useful?
Calculate the number of seconds in 1 year. Show your work and express the answer in scientific notation with proper units.