1. Prepared By: Suraj Jha – Class-XI-B Anoop Kr. Singh – Class-XI-B 2. Early Astronomy As far as we know, humans have alwaysbeen interested in the motions of objects…

1. Universal Gravitation Or How I Learned to Love Moving Objects 2. Motion in the Heavens and on Earth We know how objects move on Earth. We can describe and even calculate…

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1. Astronomy Topic 06 : Galaxies Stephen’s Quintet 2. Galaxies Galaxy : A group of millions or billions of stars, gas, and dust held together by gravity…

Slide 1General Astronomy Spectral Classes Slide 2 Spectroscopy Although astronomy has been practiced for thousands of years, it consisted mostly of observing and cataloguing…

Slide 1 Slide 2 Early Astronomy  As far as we know, humans have always been interested in the motions of objects in the sky.  Not only did early humans navigate by…

Slide 1Chapter 7 - Gravitation Key Terms Kepler’s Laws Gravitational force Law of Universal gravitation Gravitational field Inertial mass Gravitational mass Slide 2 Early…

Slide 1 Announcements Homework 2 due today First midterm test next week (W or Th), in Science Testing Center (SL 228); covers homework 1-3, lectures through 9/18 Questions…

Slide 1 © 2004 Pearson Education Inc., publishing as Addison-Wesley Dark Matter and the Fate of the Universe Slide 2 © 2004 Pearson Education Inc., publishing as Addison-Wesley…

Slide 1 Distance Ladder Slide 2 Pre-class Problem You stand are looking at “famous local landmark” from two positions on either side of the “other famous local place”.…