Everyday forces - PowerPoint PPT Presentation

Introduction to Astronomy

Introduction to Astronomy. Important Astronomical Measurements. An astronomical unit (AU) is the average distance between Earth and the sun; it is about 150 million kilometers . Light-year The distance that light travels in one year, about 9.5 trillion kilometers . (300,000 km/s).

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Wednesday January 14

Wednesday January 14. Hand-in Todays Homework. Page 139 1-4 Page 144-145 23-29 We will look at friction, air resistance. Open book quiz. Review and in class problems on Friday Test on Monday. Review: Newton’s Laws.

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