Unit 2 ASTRONOMY.

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Unit 2 ASTRONOMY

Astronomy Study of objects in space such as the Sun, stars, planets, comets, gas, & galaxies. *Also, the Earth’s place in the universe. Universe = everything that exists

Astrology is NOT science !!! Disclaimer: Astrology is NOT science !!! There is currently no evidence that star positions affect human behavior or your future. Go ahead & read your horoscope but remember that it is just entertainment!

Geo-centric Helio-centric Earth-centered view of universe Sun-centered view of solar system C. Ptolemy 90-168 N. Copernicus 1473-1543 modern view of the solar system: “the Sun” is a star planets orbit the Sun

Cosmic Size and Distance

Cosmic Size and Distance

How big are YOU in the Universe How big are YOU in the Universe? THE SCALE OF THE UNIVERSE Visit http://htwins.net/scale/

Galaxies = groups of billions of stars there are more than 100 billion galaxies they all have different shapes Spiral Elliptical Irregular

Write down your predictions Write down your predictions? clusters & constellations universe stars asteroids, meteors, meteorites solar systems galaxies planets - moons

The “Big Dipper” constellation is a pattern made of 7 stars Cosmic Size The “Big Dipper” constellation is a pattern made of 7 stars

Cosmic Size and Distance

Cosmic Size and Distance