The Big Bang was the event which led to the formation of universe, according to the prevailing cosmological theory of the universe's early development (known as the
Big Bang theory or Big Bang model). According to the
Big Bang model, the universe was originally in an extremely hot and dense state that expanded rapidly.
This expansion caused the universe to cool and resulted in the present diluted state that continues to expand today.
Based on the best available measurements as of 2010[update], the original state of the universe existed around 13.7 billion years ago, which is often referred to as the time when the
Big Bang occurred. The theory is the most comprehensive and accurate explanation supported by scientific evidence and observations.

BLUE SHIFT
The Shift of spectral lines toward the
Shorter Wavelengths and higher frequencies at the blue end of the light source is moving rapidly toward the observer.

RED SHIFT
Red Shift is a key concept for astonomers
The term of can be understood literally – the
Wavelength of the light is stretched, so the light
Is seen as shifted towards the red part of the
Spectrum. Something similar happens to sound
Waves when a source of sound moves relative to
An observer.

Constellation:Constellations are named patterns of stars. All societies created them. The classical -- "ancient" -- constellations that populate our sky began in the lands of the middle east thousands of years ago, their origins largely lost to time. They passed through the hands of the ancient Greeks, who overlaid them with their legends and codified them in ...
Popular links

Group of stars that forms a pattern
In the sky that looks likes a familiar
Object, animal or character.