Big Bang Theory 1&2

Big Bang Theory

The theory that the universe originated in a huge explosion that released all matter and energy.

Doppler Effect

A change in sound frequency caused by the motion of the source moving toward or away from the observer.

Red Shift

The change in the wavelength of light due to an object moving away from the observer.

Time of Big Bang

10-15 billion years ago

Age of Universe

about 14 billion years old

Wavelength

Distance from one point on a wave to the same point on another wave

Galaxy

Groups of billions of stars and the planets that orbit them (the stars)

Our galaxy name

Milky Way

Universe

All existing matter, energy, and space

Edwin Hubble

Discovered many things one of which is that galaxies are moving away from us and those that are farthest away are moving the fastest

singularity

point where all matter, space and time was condensed before the Big Bang

red shift

longer wavelengths of light due to an object moving away from the observer.

blue shift

shorter wavelengths in the light coming from objects moving toward the observer.