'Multiple star systems' presentation slideshows

Chapter 18 Life in the Universe

Chapter 18 Life in the Universe. 18.1 Life on Earth. Our goals for learning: When did life arise on Earth? How did life arise on Earth? What are the necessities for life?. When did life arise on Earth?. Earliest Life Forms.

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Outline

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Which do you think is the most common element (by mass) found in stars?

http://nsdl.org. Test your star power. Which do you think is the most common element (by mass) found in stars?. Helium Hydrogen Carbon Silicon. Sagittarius Star Cloud, Center of the Milky Way Galaxy. http://nsdl.org. Stars are made of:. (by mass) 70-80 % Hydrogen 20-30% Helium

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Notes- Chapter 4, Section 4: Star Systems and Galaxies

Notes- Chapter 4, Section 4: Star Systems and Galaxies. Essential Question. How do astronomers learn about the structure of the universe?. 1. Explain each type of star system. 2. Describe the major types of galaxies. Objectives. Galaxies - a huge group of single stars,

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