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Space…and Beyond! S6E1. Students will explore current scientific views of the universe and how those views evolved. a. Relate the Nature of Science to the progression of basic historical scientific models (geocentric, heliocentric) as they describe our solar system, and the Big Bang as it describes the formation of the universe. b. Describe the position of the solar system in the Milky Way galaxy and the universe Solar Eclipses • Occurs during the New Moon • The moon is almost exactly between the Earth and the Sun, blocking the sunlight from the Earth. Lunar Eclipses • Full Moon • The Earth is almost directly between the Sun and the Moon, causing the earth to block sunlight from reaching the moon. Theories: Heliocentric • Our star (Sun), the planets, many moons, and other small bodies that ALL travel around the Sun. Geocentric • The idea that the planets and moons revolve around the Earth. Types of Galaxies • Galaxies are classified by their shape. • Developed by Edwin Hubble • 3 Types of Galaxies – A. Spiral – B. Elliptical – C. Irregular What is a Galaxy? • Galaxy: A giant structure that contains hundreds of billions of stars bound together by gravity. • Spiral Galaxy: A galaxy whose arms curve outward in a pinwheel pattern. Contains solar systems and nebulae (gas, new stars, and dust). • Irregular Galaxy: A galaxy that does not have a regular shape. They do not fit in another class. • Elliptical Galaxy: A galaxy shaped like a flattened ball, containing only old stars, with bright centers and very little dust/gas Types of Galaxies Spiral Galaxy Our galaxy, The Milky Way, is a spiral galaxy Elliptical Galaxy Irregular Galaxy