EARTH IN THE UNIVERSE•The Sun and stars appear to move in an arc across the sky from east to west. •BUT in reality, the Earth moves - spins on its axis (rotates).

http://youtu.be/_9gy_BOnEOM4 minutes

Early astronomers only knew what they could discover with their eyes and minds – the Sun, the planets and the moon was their universe.

Astronomy – the study of the universe

PTOLEMY GEOCENTRIC

THEORY•Greek philosopher•Believed EARTH was at the center of the universe•All planets and the Sun revolved around the Earth•Geo – earth•centric - center

http://youtu.be/utH-GHH1FT83 min

http://youtu.be/gKu3pB42ZSo1 ½ min

COPERNICUSHELIOCENTRIC THEORY

•Polish scientist – 1543•Stated that the SUN was the center of the universe•All planets including Earth revolved around the Sun•Helio – sun•centric - center

http://youtu.be/GPBB5thPgQE2 min.

GALILEO•Italian astronomer•First to use the telescope to observe the planets and stars•Suggested that Earth and the other planets might revolve around the Sun•Tele- far•Scope - seeing

http://youtu.be/2J0-ZbbrD6U3 min Bio- Galileo

KEPLER

•German mathematician•Proposed that all planets revolve around the Sun in an elliptical orbits and that the Sun is not exactly in the center

http://youtu.be/VB3V36LJpGc2 min Kepler Bio

GEOCENTRIC VS. HELIOCENTRIC

•EARTH centered Universe•All other planets and the Sun revolve around Earth•Was accepted for 1,000s of years

•SUN centered Universe•All planets including Earth revolved around the Sun•Accepted

•Planets still rotate on their axis.•Planets still revolve around the Sun.•Planets’ moons always revolve around their planet.

http://youtu.be/iiBIFlvu-X02 min.

EARTH’S PLACE IN THE UNIVERSE

•Our SUN is one of trillions of stars in the Universe.

•All the planets in our solar system revolve around the Sun in the same direction.

•Most planets rotate on their axis in the same direction. (Venus, Uranus & Pluto – Retrograde)

•Most of the planets orbit the Sun in the same plane.

EDWIN HUBBLE•Proved that other galaxies do exist beyond the edge of the Milky Way•Proved that galaxies are moving apart and the Universe is still expanding from the Big Bang

Spiral

Elliptical

Irregular

THE MILKY WAY GALAXY

•Shaped like a flat pinwheel.•Our solar system is located in the middle of one of the arms•Spiral galaxy.

http://youtu.be/C0Ok_u1x12M3 min.

THE HUBBLE SPACE TELESCOPE

Hubble was first launched on the 24th of April 1990. Today, Hubble has been operation for over 20 years.

The Hubble Space Telescope (HST) has been our eyes on the universe for the last two decades. It has showed us what we thought we knew was impossible, it has showed us natural beauty artists haven't imagined, it has captivated the minds and hearts of millions and is the most recognized observatory ever built.http://youtu.be/zjuyPPTi1q0

4 ½ minutes

BIG BANG THEORY•Most widely accepted theory of the formation of our Universe•All matter was once together and was blown apart by a big explosion•The Universe is still expanding.•Hubble proved this expansion by measuring the movement of galaxies.

http://youtu.be/jJ3NQYoO8sg2 min.

UNIVERSE

GALAXY

SOLAR SYSTEM EARTH

http://youtu.be/lhTSfOZUNLo2 min Big Bang Song TV

TCMSM. BrumbaughCreated 2012

http://youtu.be/ZOkUcLKpAto4 min Parr – Big Bang Song

http://youtu.be/mAfOhOd8jow4 min Parr- Galaxies Song

http://youtu.be/GH61v4_eVNA3 min Parr – Solar System song