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Course: NASA?>?Unit 2
Lesson 2: Measuring the solar system- A flat earth
- Arc length
- Circumference of Earth
- Occultations
- Occultation vs. transit vs. eclipse
- Size of the moon
- Angular measure 1
- Angular measure 1
- Trigonometric ratios in right triangles
- Angular Measure 2
- Angular Measure 2
- Intro to parallax
- Parallax: distance
- Parallax method
- Solar distance
- Solve similar triangles (advanced)
- Size of the sun
- Scale of solar system
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Occultation vs. transit vs. eclipse
Problem
Planetary alignment occurs when two or more planets form a line with the sun, sometime during their respective orbits.
So consider approximately how long the following planets take to revolve around the sun...
- Mercury: 1/4 Earth Year
- Venus: 2/3 Earth Year
- Earth: 1 Earth Year
- Mars: 2 Earth Year
Assuming the planets start in an aligned state, how many revolutions will it take each planet before they are aligned again in the same position?
Planet | Revolutions |
---|---|
Mercury | |
Venus | |
Earth | |
Mars |