ISP 205: Visions of the Universe - Physics & Astronomy
ISP 205: Visions of the Universe - Physics & Astronomy
ISP 205: Visions of the Universe - Physics & Astronomy
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Our Sun moves randomly relative to <strong>the</strong> o<strong>the</strong>r starsin <strong>the</strong> local Solar neighborhood…• typical relative speeds <strong>of</strong> more than 70,000 km/hrQuestion: Why do <strong>the</strong> patterns <strong>of</strong> <strong>the</strong> stars in our sky look <strong>the</strong> same fromyear to year?… And orbits <strong>the</strong> galaxy every 230 million years (speed<strong>of</strong> 800 000 km/ hr)!© 2005 Pearson Education Inc.,publishing as Addison-Wesley