THE BIG BANG EXPLOSION , BIG BANG EXPLOSION AGO 13.5 BILLIONS YEARS AGO
THE BIG BANG EXPLOSION
THE BIG BANG EXPLOSION
Universe expands accepted astrophysical theories posit that at one point there was nothing:no stars , planet, or galaxies-no even space itself.The matter that makes up everything that now exists was concentrated in a single, extremely dense point known as a singularity.
The force of gravity in a singularity is so great that the fabric of space time curves in on itself. In an instant known as the big bang,however, the contents of the primordial singularity escaped-and formed the universe.
The big bang is catchy shorthand for a complex astrophysical theory, backed up with sophisticated calculation.The term was coined in the 1950s by British astronomer fred Hoyle,a proponent of a theory of the universe as a steady state. In fact,Hoyle used the term derisively.Though the name stuck,it gives a false impression,making it seem as though the event that unleashed all the energy of the universe almost 14 billion years ago was an explosion.Astrophysicists see the big bang more as an instantaneous expansion that within a few seconds created nuclear reaction and produced the protons,neutrons and electrons that from the structure of matter today.Not long after the nuclear reaction stopped. The universe was roughly one-quarter helium,three-quarter hydrogen-a ratio exhibited in the universe's oldest stars today.The formation of the universe played out over billions of the years.Our own Earth,along with solar system,is a product of stellar explosion almost five billion year ago. The story of the universe still is being written and refined By all scientist accounts, it continues to expand,and the question of an eventual and looms large in current investigations.The universe itself provides some concrete support for the big bang theory in the form of cosmic background radiation,the "afterglow"of the cosmic inflation.In 1965,engineers looking for the sources of the static interfering with satellite communication found a consistent signal emanating from every point in the sky at the wavelength predicted for this radiation.
10-35 SECONDS LATER
The big bang is catchy shorthand for a complex astrophysical theory, backed up with sophisticated calculation.The term was coined in the 1950s by British astronomer fred Hoyle,a proponent of a theory of the universe as a steady state. In fact,Hoyle used the term derisively.Though the name stuck,it gives a false impression,making it seem as though the event that unleashed all the energy of the universe almost 14 billion years ago was an explosion.Astrophysicists see the big bang more as an instantaneous expansion that within a few seconds created nuclear reaction and produced the protons,neutrons and electrons that from the structure of matter today.Not long after the nuclear reaction stopped. The universe was roughly one-quarter helium,three-quarter hydrogen-a ratio exhibited in the universe's oldest stars today.The formation of the universe played out over billions of the years.Our own Earth,along with solar system,is a product of stellar explosion almost five billion year ago. The story of the universe still is being written and refined By all scientist accounts, it continues to expand,and the question of an eventual and looms large in current investigations.The universe itself provides some concrete support for the big bang theory in the form of cosmic background radiation,the "afterglow"of the cosmic inflation.In 1965,engineers looking for the sources of the static interfering with satellite communication found a consistent signal emanating from every point in the sky at the wavelength predicted for this radiation.
AFTER THE BIG BANG
Big bang's energy turns into matter
10-5 SECONDS LATER
Universe's natural forces take shapes
3 SECOND LATER
Nucleic of simple element formed
10,000 YEARS LATER
Universe's energy becomes radiation
300,000 YEARS LATER
Energy in form of matter equals energy in form of radiation
300,000,000 YEARS LATER
Gas pocket density increases;stars form
FACT- Astronomers can map the temperature of cosmic microwave background radiation as it was only 380,000 years after the big bans.
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