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Astronomy Take Home Test

Astronomy Take Home Test - 3 How fast would the Earth have...

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Take home test 1 This must be handed in at the beginning of the in-class test. SHOW ALL YOUR WORK! That includes writing the equations that you use. You may use other resources, but you may ask nothing of anyone real or web. 14 points 1. Look up the data for the four Galilean satellites in the table at the back of the book. Using the orbital data, calculate Jupiter’s mass. How do your four determinations agree with each other and the official value? 8 points each 2. I would like to reduce my weight on the surface of the Earth by a factor of 2. I don’t want to change my mass. Nor do I wish the Earth to change its density (since I know it is a terrestrial planet). I also hate falling; so I wish to stand on the surface of a solid Earth. You can change my size, the Earth’s size and mass, the Sun’s size and mass and the distance between the Sun and the Earth. What do you need to change and by how much?
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Unformatted text preview: 3. How fast would the Earth have to be going, compared to its present speed , to escape from the Sun? 4. How much would you have to change the Earth’s mass to make our year half as long? (You don’t get to change the Earth-Sun distance or the Sun’s mass) 5. If I try to make those observations of the Galilean satellites (see above). How large of a telescope would I need? Assume: Jupiter is at opposition; both the satellites and the planet are single points of light; you are observing at 500nm; and you only need to measure when the satellite is furthest from the planet. (Hint – this is a question about telescopic resolution,) 4 points 6. Assume Neptune and Ganymede both reflect ½ the light they receive from the sun. Which is the brightest and by what factor? Jupiter and Neptune are both at opposition and you can assume Ganymede is the same distance from the Earth as Jupiter....
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