Historical Astronomers in Context

My chosen astronomer is Johannes Kepler, who lived from 12/27/1571 – 11/15/1630. Kepler helped us understand orbits. He developed three rules, the first of which tells us that things orbit in elliptical shapes. His second rule tells us that when something is in orbit, it sweeps equal areas in equal time. His third rule shows us a […]

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The Lunar Cycle

The moon completes it orbit around Earth every 29.5 days, creating the lunar cycle. The most interesting thing I learned from the Chapter 2 reading was that the word “month” is meant to sound like “moon” – I’m surprised I never knew the origin of the word before! As the moon orbits Earth, we are able […]

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The Size of the Universe

After reading our first assignment in the text, I am stunned by the size of the universe. Our book, The Cosmic Perspective, asks us to imagine that there are 10,000,000,000,000,000,000,000 stars in the observable universe. And then there are more beyond that, over 14 billion light years away! Now I’m thinking about how many planets […]

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First Post

Welcome to my Solar Systems blog! I look forward to posting here throughout the semester. This is one of my favorite pictures. Last summer, I taught at an amazing school in India and this was the view from my study hall classroom every evening!

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