Astronomy Share-a-thon 65 Files

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Finding Polaris
Once you are able to identify the North Star, you will be able to find North. Simply trace a line from the star to the horizon, and that is North. To your right is East, straight behind you is South, and to your left is West.

Lunar Distance with Phases
Animation of moon phases in Earth and space views.

Rewind Clock to See Beginning of Time
Goes back to show the beginning of time, when the universe was created.

Life cycles of stars
Details the life cycle of stars.

Space Slide Show
A slide show that shows some interesting images of space.

Weighing and Determining the Average Density of Earth
1. the Law of Gravitation, applied to the Earth System 2. density 3. experimental errors

HR Diagram Lab
This is a fairly advanced usage of excels graphing wizard. If students are unfamiliar with it I would do another introductory data entry exercise first.

Calculate Planetary Diameter using a Safety (Safe-T) compass
An older lab where students calculate the equatorial diameters of the nine planets using mathematical ratios then plot them using a safety compass.

Ellipses
The earth revolves around the sun in an orbit which is a special geometric figure called an ellipse. An ellipse has two "center points". Each one is called a focus. The Sun is not in the exact middle of the earth's orbit.

Shadow Lab
The attached Shadow Lab works well for a 40 minute class period. On the Shadow Lab Report Sheet, you will need to draw a sun path for each diagram and label the five positions.