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Make a list of words that come to mind when you hear the word: Astronomy.

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Presentation on theme: "Make a list of words that come to mind when you hear the word: Astronomy."— Presentation transcript:

1 Make a list of words that come to mind when you hear the word: Astronomy

2 SunUniverse EarthBig Bang Theory MoonAsteroids PlanetsMeteors StarsConstellations CometsSatellites NASAGravity Black HolesSupernova

3 History of Astronomy

4 Essential Question How do astronomers learn what is beyond our atmosphere? Todays Objectives: – Explain geocentric and heliocentric models of solar system – Describe history of Astronomy

5 Before We Begin… Planets Solar System Solar System Galaxy Galaxies Universe

6 Early Greek Astronomers Ptolemy Geocentric Model – states that the Earth is the center of everything in universe Planets move in perfect circles around the Earth

7 Copernicus 1500s Polish astronomer Heliocentric Model – states that the Sun is the center of the universe Planets move in perfect circles around the Sun

8 Galileo Late 1500s - early 1600s Believed Heliocentric Model Inventor of telescope – Observed moons of Jupiter – Observed phases of Venus

9 Kepler Late 1500s, German mathematician Planets have elliptical orbits Unable to explain why planets orbits were elliptical

10 Newton 1600s-1700s Studied Gravity – developed Universal Law of Gravitation Explained why planets orbit in ellipses

11 Einstein Physicist, early 1900s Theory of Relativity E= mc 2 Energy = (Mass)(Speed of light) 2


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