195196 Counting Galaxies 3/2/15 Starter: Practice : Fill in chart Application/ Exit Connection: A B C D C How many objects are there in 1 section? _____.

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Counting Galaxies 3/2/15 Starter: Practice : Fill in chart Application/ Exit Connection: A B C D C How many objects are there in 1 section? _____ X 8 =_____ ______ X 90 million= _________ __________X 1 trillion= # of stars Based on the information you gathered from the lab and your notes, which type of galaxy is found most in the universe and why? 3/2/15 Counting Galaxies How is an elliptical galaxy different from a barred spiral and what can you find in each? SpiralIrregularElliptical

March 2, 2015 AGENDA Objective 8.8A Describe components of the universe, including stars, nebulae, and galaxies, and use models such as the Herztsprung- Russell diagram for classification by reading and writing while taking notes and identifying activity. 1. Starter 2. Notes 3. Activity 4. Exit

DateLecture/ Activity/ Lab Page Table of Contents 2/20 Formation of the Universe /23 Big Bang Lab /24 Lives of Stars /25 Characteristics of Stars /27 Galaxies /2 Counting Galaxies

Practice Write the letter of each type of galaxy under the correct heading in the chart. SpiralIrregularElliptical B C E F A G H L D I J K

1.Using your ruler and pencil, divide the Hubble Deep Field image into 8 equal sections. 2.Count how many objects there are in one section.

3. Multiply that number by 8 to estimate how many objects are in the whole picture. 4. It would take 90 million images of the area to cover the entire sky. Multiply your number from step 3 by 90 million to arrive at an estimate of the number of objects in the universe.

Counting Galaxies 3/2/15 Starter: Practice : Fill in chart Application/ Exit Connection: A B C D C How many objects are there in 1 section? _____ X 8 =_____ ______ X 90 million= _________ __________X 1 trillion= # of stars Based on the information you gathered from the lab and your notes, which type of galaxy is found most in the universe and why? 3/2/15 Counting Galaxies How is an elliptical galaxy different from a barred spiral and what can you find in each? SpiralIrregularElliptical