WARM UP Did you look at the stars? Who/what is Andromeda? What do you see in this picture?

WARM UP

• Did you look at the stars?

• Who/what is Andromeda?

• What do you see in this picture?

THE CONSTELLATIONS AND GREEK

MYTHOLOGYDAY 2

WHAT IS ASTRONOMY?

• It is the branch of science that deals with the celestial objects, space and the physical universe as a whole

• What does that even mean?!

• It means that the Study of Stars, Planets and Space

2 TYPES OF ASTRONOMERS

• Observational

• Theoretical

OK… SO HOW DO THOSE GREEK PEOPLE COME INTO

PLAY?THEY LOOKED AT THE SKY TOO

HISTORY OF THE GREEKS & WHY THEY LOOKED AT THE SKY

• It was practical.

SO THE GODS DID WHAT?

• Became an explaination

EVENTUALLY

• The Greeks moved away from divine power

ANDROMEDA

WARM UP

• How old do you think the universe is?

WARM UP 8/28

• Do you think Aliens exist?

• What about multiple dimensions?

• If money wasn’t an issue….. would you travel into space?

• What do you think NASA does?

LET’S GET STARTED 9/4

• What is the Harvest Moon?

• Somewhere, something incredible is waiting to be known.

• - Carl Sagan

THE BIG BANG

• What do we know about it?

• But what caused it?

EVEN BIGGER PROBLEM

• We speculate that we’re missing between 12/13 billion years of time, but

• Since the Big Bang

STELLAR DISTANCES

• The light-year

• What does it equal?

• 5.878 x 10^12 miles per year

• 5,880,000,000,000

• 186,000 miles per second

• 671 million miles per hour

LENGTHS

• 186,000 miles per second

• 671 million miles per hour

CONVERSION

• Miles to Kilometers

• 300,000 km/s

• 1,080,000 km/h

HANDS ON

• Measuring the distance between the Sun and the planets.

• We will be adding in Ceres.

REMINDER

HARVEST MOON TONIGHT!!!!!

OUR PLACE IN THE UNIVERSE

COSMIC ADDRESS

• Earth -> planet in the solar system• Has the Sun & objects that revolve around it

• Sun, star, and all the other stars that we see -> Milky Way Galaxy• Galaxy -> like an island

• Group of galaxies -> Local Group• Local Groups w/ more than 12 -> Galaxy Cluster• Tightly packed Galaxies & Galaxy Clusters -> Super Cluster• Together everything = Universe

BIG BANG RECAP

• Occurred about 14 billion years ago

• Things were hot, then they cooled

• Expansion

STELLAR LIVES AND GALACTIC RECYCLING

• How did planets form?

• Nuclear fusion

GALACTIC RECYCLING

• Star death- Supernovae

ELEMENTS

• In the beginning there were only 2.

• Conversion

THE PAST…. AGAIN

• When we look at the light from other stars and galaxies that aren’t our own, we’re looking into the past.

• Light years

• The distance light travels in one year.

LIGHT FROM ORION

• The Hunter

• 1500 light years from Earth

WHAT WE CAN SEE IN THE UNIVERSE

• Limited by the Observable Universe

• Remember the Past

• The Universe is 14 Billion Years old (approximately)

• The light from the farthest stars we can see, sends us light from 12 billion years ago.