Bits

1
(No Transcript)
2
13.7 Billion years
Now
Big Bang
Expansion 1000
Stars/galaxies Vacuum between
3
(No Transcript)
4
The first sound waves

• gas falls into valleys, gets compressed, glows
  brighter

b) it overshoots, then rebounds out, is
rarefied, gets dimmer
c) it then falls back in again to make a second
compression
? the oscillation continues ? sound waves are
created
5
(No Transcript)
6
Creations Opening Chord
7
Observing the Microwave Background
Bell Labs (1963)
COBE satellite (1992)
WMAP satellite (2003)
8
(No Transcript)
9
Creating the Microwave Background
rarified cool
Now
atomic transparent
we see a glowing wall of bright fog
orange light
microwaves
10
Big Bang
Near Far
Now red-shift Then
Far Near
Big Bang
Then red-shift Now
Big Bang
11
Sound Waves in the Sky
NASAs WMAP satellite
The CMB Sound Spectrum
sound
Loudspeaker
Loudness
Frequency
Wavelength
Lower Pitch
Higher Pitch
Similar to water waves
short plus medium plus long all mixed together
The Microwave Sky
12
Cosmic Lifespan
380,000 yr
10
5
Time (Gyr)
14
0
Big Bang
here now
nearby galaxies
HST
CMB
JWST
Human lifespan
Conc- eption
teenage
child
Old age
12hr
13
C(l) as observed
14
stars
galaxies
clusters
tapestry
Evolving Sound Spectra Red atomic matter Blue
dark matter Times 300,000 yrs 2 and 15 million
yrs. Collapse occurs when amplitude reaches top
arrow.
15
1 Million Galaxies
3 billion light years (20 to the edge)
Our galaxy is here