Earth, Moon, Sun
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Today, you know it's the same time everywhere in your time zone thanks to Universal Coordinated Time. But when humans used the Sun to tell time, they couldn’t tell time precisely.
Learn why seasons change. Discover how they’re different in the Northern and Southern hemispheres.
Learn why we have seasons in this hands on activity.
Do you weigh the same on Jupiter as you do on Earth? Learn to calculate your weight on a different planet.
Students learn about and apply observing, sorting & classifying, and comparing & contrasting skills as they learn about the cycle of day and night.
8 images of different lunar phases showing the portion of the Moon lit by the Sun as the Moon orbits the Earth and as seen by us on Earth
Learn how people came to understand the source of cosmic radiation, as well as how this radiation impacts those who work in and travel on airplanes.
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Job Title
Associate Professor, Astronomy