NEBULAR THEORY The Sun and all the planets

NEBULAR THEORY • The Sun and all the planets of our Solar System began as a giant cloud of molecular gas and dust.

• Giant cloud of molecular gas and dust.

NEBULAR THEORY • Something happened that caused the cloud to collapse.

• Something caused the cloud to collapse.

NEBULAR THEORY • Maybe. . . a passing star, or shock waves from a supernova?

• A passing star. . . a supernova?

METEORITES • Fragment of rock or iron from outer space.

METEORITES • Survives passage through the atmosphere of Earth.

METEORITES • Impacts the surface of the Earth.

METEORITES • Originate in the asteroid belt between Mars and Jupiter.

METEORITES EARTH ROCK METEOR • Same age and composition as Earth.

HEY – NEW STARS!

NEW STARS! • From elements of exploding

EARTH’S HEAVY ELEMENTS • Came from exploding

DID YOU KNOW? • 99% of all matter in the solar nebula is now in the sun?

MERCURY • Closest to the sun.

MERCURY • Rotates really slow, too.

YOUNG EARTH • D-I-F-F-E-R-E-N-T-I-A-T-I-O-N

DIFFERENTIATION Mantl e e Cor t s Cru

HOW DO YOU KNOW. . . EARTH REVOLVES AROUND THE SUN?

CONSTELLATION CHANGES OVER A FEW WEEKS

HELIOCENTRIC

WHO CAME UP WITH THIS COOL IDEA? COOL COPERNICUS!

WHAT’S IN OUR SOLAR SYSTEM?

BUT, NOT THE MILKY WAY!

EARTH’S ATMOSPHERE

INTERFERENCE!!!!

SOLUTION?

TECHNOLOGY! ! A AT D E OR M S A F ! R TE

RADIO TELESCOPE • Invisible electromagnetic radiation.

REFRACTING TELESCOPE • Gathers and focuses light