Rr lyrae variables - PowerPoint PPT Presentation

Universe Eighth Edition

Roger A. Freedman • William J. Kaufmann III. Universe Eighth Edition. CHAPTER 24 Galaxies. Chapter 24 and 26 online quizzes due Thursday 12/9 Skip Chapter 27 Final Exam – Monday 12/13, 5:30-7:30 PM The final will cover chapters 23, 24 and 26 only, same format as Exams 1-3. Last HW!.

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Distances

Distances Near objects appear to move more than far objects against a distant horizon. Trigonometric parallax is used to measure distance to near stars. Parallax time A r y Earth’s orbit d distant stars time B near stars

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