Galaxies & Light Years - Seger's Science

Galaxies & Light Years - Seger's Science

Galaxies & Light Years Presented by Kesler Science Essential 1. Can you describe the three Questions: main type of galaxies in the universe? 2. Can you model how light years measure distances in the universe? Light Years Measuring Distances Light Year The distance

light travels in one year. Light travels at 186,000 miles/sec or 671 million (6.71108) miles/hour It takes 8.4 minutes for light to travel to the Earth KeslerScience.com KeslerScience.com Pluto Sun Measuring Distances The closest star to the

Sun is Proxima Centauri. Its 4.24 light years away. It takes 5.5 hours for the Suns light to reach Pluto. Proxima Centauri Light Years 4.24 Light Years Quick Action - Light Years Model Get with a partner and add the following data to the model below. Time for Light to

Reach Object in Space Barnards Star 5.9 years Luhman 16 6.59 years Earth 8.4 minutes Pluto 5.5 hours

Sirius A 8.58 years 8 Light Years KeslerScience.com Sun Object in Space Quick Action - Light Years Model Answers Luhman 16

6.59 years Earth 8.4 minutes Pluto 5.5 hours Sirius A 8.58 years Pluto Earth 5.9 years

8 Light Years KeslerScience.com Sun Time for Light to Reach Object in Space Barnards Star Barnards Star Luhman 16 Siruus A

Object in Space Light Years and Galaxies Galaxies A galaxy is a system of millions or billions of stars, made of gas and dust, held together by gravitational attraction. Galaxies are different sizes and shapes. How far is it across our own galaxy? How many stars are in the Milky Way? KeslerScience.com 100,000 Light Years

200,000,000,000 stars Galaxy Classification Spiral/Disk Galaxy Spiral or disk shaped Has arms Dense center We live in a spiral galaxy called the Milky Way. Our Sun is located about 2/3 of the way out on one of the arms. KeslerScience.com The Sun

Galaxy Classification Elliptical Galaxy Oval-shaped Most abundant galaxies in the universe Most are composed of older, low-mass stars KeslerScience.com Galaxy Classification Irregular Galaxy No defined shape No clear bulge or disk

The leftovers of two colliding galaxies KeslerScience.com Quick Action Galaxies INB Template Galaxies INB Template 1. Cut out the template. 2. Glue it to your journal along the skinny tab. 3. Fold like an accordion along the KeslerScience.com

Check for Understanding Write a short essay to answer the following questions. 1. What is a galaxy? 2. How are galaxies classified? 3. What are some characteristics of each galaxy? 4. Where is the sun located in our galaxy? KeslerScience.com Check for Understanding Can you 1. Describe how galaxies are classified? 2. Describe different

characteristics of each galaxy? 3. Model how light years measure distance in space? KeslerScience.com

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