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