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Cosmic Times
Size: 300,000 Light Years
Age: Infinate
(1): The observations showed that the center of the Milk Way is 60,000 LY from the sun
(2): The Milky Way is 300,000 LY across from the sun
(3): Einstens theory was correct (that the suns gravity would bend starlight as it passed by the sun). -
1929
Size: 289 million LY
Age: 2 billion yrs
(1): Hubble identified 3 types of galaxies, eliptical, spiral, and irregular.
(2): Dr. Hubble used the hooker telescope to see the idividual stars
(3): Hubble foudn that Andromeda was 900,000 LY away proving that it lies outside of the Milky Way. -
1955
Age: 6 billion
Size: 4-8 billion
(1)- The big bang theory was one of the two theories for the origin of the universe.
(2)- The second theory was the steady state theory
(3)-Walter Baade used the hooker telescope on Mount Wilson Observatory to take images of Andromeda. -
1965
Age: 10-25 billion
Size: 25 billion LY
(1)- Arno Penzias and Robert Wilson were trying to track down unwaited noise in signals they got from the antenna
(2)- Some colleagues at Princeton Univ. had the answer- the radiation ws coming from the fireball
(3)- the Fireball is a dense ball of matter and every that existed at the beginning of the universe. -
1993
Age: 12-20 billion
Size: 30 billion LY
(1)- The Universe started out as a dense ball of energy that began to expand.
(2)- The theory of inflation states that the universe underwent a very rapid expansion in a short amount of time causing the cosmic mivcorwave backround raditation to be uniform in all directions that we look.
(3)- Two "standard candles" that astronomers used was the cephid variable stars type and the supernova. -
2006
Age: 13.7 billion
Size: 94 billion LY
(1)- The comoposition of our universe is 73% dark energy, 4% atoms and 23% is dark matter
(2)- Dr John C. Mather was an NASA scientist who won the nobel prize in physics for discoveries about the cosmic microwave backround.
(3)- CMB stands for Cosmic Microwave Backround
