Tuesday, January 15th

1. Discuss HW

HW = Classifying Stars WS

HOW ARE GALAXIES CLASSIFIED?

2. Check/Go Over Online Universe Info. Collection3. Universe Evolution Diagram / Ideas

4. Galaxy Webquest 5. HW Work Time?

Astronomy vs. Astrology

predictive  and  divinatory  knowledge  was  on  of  the  motivating  factors  for  astronomical  observation    

an  attempt  to  find  some  sort  of  meaning  or  influence  in  the  planetary  positions      

astrology

slow  wobble  of  Earth  on  its  axis,  the  position  of  the  elliptic  in  the  sky  has  shifted,  the  zodiac  positions  are  not  the  same  as  they  were  2,000  years  ago  (libra  not  Oct.  11)

13  (not  12)

25

Nov.  23  -­‐  Nov.  29

Caused  by  the  line  of  sight  when  looking  at  an  outer  planet  that  is  being  overtaken  by  a  faster  moving  inner  planet

1.  A  science  that  compels  me  to  seek  beyond  myself  and  our  small  world2.  Science  of  discovery  that  enriches  my  life  by  exercising  my  brain  and  my  intellect      

Fascination  for  space  and  the  possibility  of  worlds  beyond  our  own  and  a  science  beyond  our  current  understanding    

NO

14 BILLION YEARS AGO

RAISIN BREAD - THE RAISINS CONSTANTLY MOVE APART

1927

EDWIN HUBBLE

RADIATION GIVEN OFF BY THE BIG BANG

ALBERT EINSTEIN'S GENERAL THEORY OF RELATIVITY

17 SECONDS

THEORETICAL SUBSTANCE THAT MAKES UP MOST OF THE UNIVERSE

GALAXIES WERE REVOLVING AROUND THE CENTER OF THE CLUSTER FASTER THAN THEY SHOULD HAVE BEEN BASED ON THEIR MASS

GRAVITY

NO

DARK MATTER EXPLAINS HOW THE GALAXIES HOLD TOGETHER "GRAVITATIONAL GLUE"

DARK ENERGY IS THE HIDDEN FORCE THAT IS THOUGHT TO PUSH GALAXIES APART, CAUSING THE UNIVERSE TO EXPAND

MEDIUM

SMALL

LARGE

6,000,000,000,000

(6 TRILLION) MILES

93,000,000

(93 MILLION) MILES

3.26 LIGHT YEARS

THINGS CLOSE TO EARTH, NEARBY STARS

DISTANCES W/INOUR SOLAR SYSTEMOR OTHER SOLARSYSTEMS

STARS, DISTANT GALAXIES

*DISTANCELIGHT TRAVELS IN 1 YEAR

AVG. DISTANCEBETWEEN EARTH &SUN

ABOUT THE DISTANCE TO PROXIMA CENTAURIMEASURING BY TRIANGULATION (PARALLAX)

Universe Diagram / Evolution

Universe Diagram / Evolution

PRIMORDIALATOM

EXPLODES14 BILLION YEARS AGO

BIG BANG

DA

RK

EN

ER

GY

DARK MATTER"CLUMPING"

"EX

PAN

SIO

N"

dust & gas, solar nebular, star(s), planetesimals, planets

Hub

ble'

s La

w"fa

rter!"

GE

T FA

R A

WAY

!!!

COSMIC BACKGROUNDRADIATION

Evidence Scientists Use to Support the BIG BANG THEORY1. Moving GalaxiesAll galaxies are moving away from us and one another

2. Cosmic Background RadiationA glow from thermal energy left over from the big bang explosion