Post on 14-Jan-2016
transcript
Big Bang Theory
Cosmology
Study of deep space and the dynamics of universe
other galaxiesstars (nebula, supernova…)origin of the universeblack holes
http://www.youtube.com/watch?v=xsQ1XmqEe6M
Big Bang explained
Big Bang Theory 13.7 bya Entire universe was
once a dense, hot, supermassive ball (singularity).
Expansion(bang) hurled material in all directions
Allmatter/space/time created in that instant
Evidence that supports the
Big Bang Theory
1.Cosmological Red Shift- all galaxies (outside the Local Group) are showing
a red shift
Equal expansion
Hubble’s Law Farther galaxies
are receding faster
Even space is expanding!
What is the universe expanding into?
2. Cosmic Background Radiation- Microwaves
If the universe started HOT, there should be heat leftover
Heat was found as microwaves
(Penzias and Wilson calculated the exact temperature this radiation would have cooled to since the Big Bang- Nobel Prize 1978)
NASA’s COBE and WMAP satellite able to detect cosmic microwaves
The correct amount and temperature!
PLANCK image of CBR
3. Abundance of light elements
Universe is full of abundant H and He
Big Bang theme song
Misconceptions about BB No center Doesn’t explain ORIGIN of universe Not an explosion
Expansion
Future of the Universe?
• Keep expanding- -Universe will last foreverData supports this
• Big Crunch- Gravitational contraction-
Big Bang in reverse-
no data to support this
• Oscillating- Outward expansion and then gravitational
contraction will follow; cycle repeats
no data to support this
What caused the big bang?
Let’s have the noble prize winner in physics tell you..
http://www.youtube.com/watch?v=0ITscmLp3Vs&safe=active