Review sheet Astronomy Test 1: Chapters 1, 2, & 3 At the end of each chapter you will see a section Quick Quiz. One third to one half of the test will be these questions. Chapter 1 The definitions of Astronomical Objects, Units and Motions on page 6 Astronomical units is earths average orbital distance (150 million km), ecliptic plane is Earth’s orbital path which is defined by a flat plane, and the axis tilt is earths tilt that is 23.5 degrees from a line perpendicular to the ecliptic…
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