“I bet a fun thing would be to go way back in time to where there was going to be an eclipse and tell the cave men, “If I have come to destroy you, may.

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Presentation transcript:

“I bet a fun thing would be to go way back in time to where there was going to be an eclipse and tell the cave men, “If I have come to destroy you, may the Sun be blotted out from the sky.” Just then the eclipse would start, and they'd probably try to kill you or something, but then you could explain about the rotation of the Moon and all, and everyone would get a good laugh.” Jack Handy

Notices: Readings updated: Use the readings to supplement your understanding. Everything you need to know will be covered in class. Please keep your cell phones, tablets, and computers put away- I would like your attention for these 50 minutes.

Intro questions How big is the Earth? The Earth is about 6.4 million meters in radius.

Intro questions How far away are the Sun and Moon?

Intro questions How far away are the Sun and Moon? The Moon is 384 million meters from the Earth (~250,000 miles). The Sun is 1.5x10 11 m from Earth (150 billion m, or ~93 million miles). This distance is called 1 astronomical unit (AU).

A picture of our solar system. Order by size: Earth, Moon, Sun, Stars, Comets, Planets

A picture of our solar system. Order by size: Earth, Moon, Sun, Stars, Comets, Planets How could you determine these sizes?

What is at the center of our solar system?

The Sun (Could you prove it?)

What is science? understanding the world around us using observation, experiment, and deductive reasoning.

The scientific method ➲ Do an experiment or make an observation. ➲ Determine an explanation (theory) for the observation. ➲ From the theory, make predictions. ➲ Make further observations to test the prediction. ➲ Eliminate or refine the theory.