Saturday, December 12, 2015

The initional hot and dense state is called the PLANKepoch , a brief  period extending  from  time zero to one Planck time unite of approximately 10-43 seconds. During the Plank epoch , all types of matter and all  types of energy were concentrated into a  dense state, where gravitational is believed to have been as strong as the oyher fundamental forces , and all the forces may have been unified. Since the Plank epoch ,the Universe has been expanding to its present form, possibly with a very brief  period of cosmic inflaction which caused the Universe to reach a much larger size in less than 10-32 seconds.
After the Plank epoch and inflaction came the quark , hadron , and lepton epochs. Togather ,these epochs encompassed less than 10 second of time following the Big Bang. The observed abundance of the elements can be explained by combing the overall expansion of space with nuclear and atomic physics. As the Universe  expands , the energy density of electromagnetic radiation decreases more quickly than dosethat  of matter because the energy of a photon decrease  with its wavelenth . as the Universe expanded and cooled , elementary particles associated stably in to ever larger combinations. 

Sunday, December 6, 2015

  This is the universe origional image 

         universe এর চিত্র ফলাফল


                    The Universe is all of time and space and its  contents .The Universe includes planets , stars , galaxies , the smallest subatomic particles , and all matter and energy.
Some important details of Universe
1)    Age :- 13.799+ or – 0.021 billion years
2)    Diameter :- Possibly infinite ; at least 91 billion light years (28*109pc)
3)    Mass :- at least 1053kg {ordinary matters}
4)    Average density :- 4.5*10-31g/cm3
5)    Average temperature :- 2.72548 K
6)    Main contents :- Dark matter (26.8%), ordinary ‘baryonic’ matter (4.95%), Dark energy (68.3%)
7)    Shape :- Flate with only a 0.4% margin of error.

                 The Universe is customarily defined as everything that exists , everything that has existed , and everything that will exist.
According to our current understanding the Universe consists of three constituents. SPACETIME , FORM OF ENERGY , AND THE PHYSICAL LAWS that related them .
 universe এর চিত্র ফলাফল

                         The word ‘Universe’ derives from the old French word ‘Univers’ .