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

THE CONSTELLATIONS AND GREEK MYTHOLOGY DAY 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? x 10^12 miles per year 5,880,000,000, ,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.