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Chapter 3: Gravity and the Rise of Modern Astronomy
The Moons of Jupiter
Galileo, the discoverer of four of Jupiter's moons, and the person for whom these moons are named, said "the Jupiter system represents the solar system in miniature." Visit this site to discover more about this fascinating system.
Study the data given at this web site and answer the following questions: 1) Name the four largest moons of Jupiter. 2) The lesser moons of Jupiter divide naturally into 3 groups. What distinguishes one group from another?
Visit the Jovian Satellite Fact Sheet web site
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Satellite Locations
The Hubble Space Telescope, or some other astronomical satellite may be passing over your home right now. This site gives the present location of the HST and several other satellites.
Use JTrack to report when the HST will next pass close to your location. (Hint: See the instructions at the bottom of the page.) In approximately what direction will it be moving at that time? Click on some other satellite and report the same information for it.
Visit the JTrack 2.5 web site
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General Relativity
Nearly a century after its formulation by Einstein, the General Theory of Relativity is being applied to many aspects of astronomy by astrophysicists around the world.
Follow the links on this site to learn about "Spacetime Wrinkles." A) What are gravitational waves? B) What is the evidence that they are real?
Visit the Relativity Group Projects web site
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