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http://scaleofuniverse.com/

ASTRONOMY CHAPTER 4; Section 4: GALAXIES AND THE UNIVERSE

Universe


OUR COSMIC ADDRESS
Homer-Center J/S HS
70 Wildcat Lane
Homer City, PA
USA, North America
Earth, Solar System
Milky Way, Local Group
VIrgo Supercluster, Universe
  • Vocabulary/Universography


UNIVERSE-SUPERCLUSTERS-CLUSTERS-GALAXIES-STELLAR SYSTEMS-PLANETARY SYSTEMS

CHECK YOURSELF: What is the Proper noun for our. . .

Supercluster?
Cluster?
Galaxy?
Stellar System?
Star?
Planet?
Natural Satellite?

PRACTICE VOCABULARY QUIZ
A. Supercluster
B. Cluster
C. Galaxy
D. Stellar System
E. Star
F. Planet
G. Natural Satellite
H. Universe

1. a huge ball of nuclear reacting gas that produces light and heat
2. a star and all orbiting bodies caught in ints gravitational pull
3. a group of galaxies
4. a body that orbits something in space; a "moon"
5. a huge group of star systems, gas, and cosmic debris held
together into a shape around a central gravitational point
6. a sphere of matter that orbits a star; it must be large enough and
gravitationally strong enough to have cleared a path on either side of its orbital path
7. a group of galactic clusters
8. everything that we know to exist

http://www.kidsastronomy.com/

Think about it: What is a nebula and how does it play a role in star formation?



THE BEGINNING OF THE UNIVERSE (9-15 BILLION YEARS AGO)

external image CMB_Timeline75.jpg
external image CMB_Timeline75.jpg



Click the word “bang” to read about The Big Bang
  • Origins, Matter vs. Antimatter
    external image part-antipart.jpg
    external image part-antipart.jpg


SUPERCLUSTERS - Groups of Clusters

Our supercluster, the Virgo Supercluster or Local Supercluster is shown in the map below, can you find our cluster?
6_Virgo_Supercluster_(ELitU).png

CLUSTERS - a group of galaxies

*There are 45 Galaxies in Local Group. Many are shown below on this map. Can you find our galaxy?

5_Local_Galactic_Group_(ELitU).png

GALAXIES - Classification of galaxies is by shape
  • Elliptical
  • Spiral
  • Irregular

click here to learn

"Bird's Eye View" of Our Galaxy: Milky Way


milkyway.jpg
milkyway.jpg































Did you Know? - Sun is only one of 200 BILLION stars in Milky Way!!!


OTHER GALAXIES IN THE UNIVERSE BESIDES MILKY WAY! click here: http://images.google.com/imgres?imgurl=http://www.sdss.org/iotw/NGC5585.jpg&imgrefurl=http://www.sdss.org/iotw/archive.html&usg=__7xMQvYEH853a00qPKqQtmAhXpvk=&h=545&w=700&sz=88&hl=en&start=18&um=1&itbs=1&tbnid=AuTPyk3dM5uyaM:&tbnh=109&tbnw=140&prev=/images%3Fq%3Dother%2Bgalaxies%26um%3D1%26hl%3Den%26safe%3Dactive%26sa%3DN%26rls%3Dcom.microsoft:en-us%26tbs%3Disch:1