BIG BANG
2.
Accepted astrophysical theories posit that at one point there was nothing: no 0- 0- .., stars, planets, or galaxies not space itself. The matter that makes up everything that now exists was centrated in a single, extremely dense point known as a singularity.
The force of gravity in a singulaity 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 calcu-lations. 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 en-ergy of the universe almost 14 billion 1years ago was an explosion.
Astro-physicists see the big bang more as an The story of the universe still is instantaneous expansion that within a being written and refined. By all scien-few sect:nds created nuclear reactions tific accounts, it continues to expand, and produced the protons, neutrons, and the question of an eventual end and electrons that form the structure looms large in current investigations. of matter today. Not long after, the The universe itself provides some nuclear reactions stopped.
The uni- concrete support for the big bang the-verse was roughly one-quarter heli- ory in the form of cosmic background urn, three-quarters hydrogen—a ratio radiation, the "afterglow" of the cos-exhibited in the universe's oldest stars mic inflation. In 1965, engineerslooking today. The formation of the universe for the source of the static interfering played out over billions of years. Our with satellite communications found a own Earth, along with our solar sys- consistent signal emanating from ev-tern, is a product of a stellar explosion ery point in the sky at the wavelength almost five billion years ago. predicted for this radiation.
Accepted astrophysical theories posit that at one point there was nothing: no 0- 0- .., stars, planets, or galaxies not space itself. The matter that makes up everything that now exists was centrated in a single, extremely dense point known as a singularity.
The force of gravity in a singulaity 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 calcu-lations. 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 en-ergy of the universe almost 14 billion 1years ago was an explosion.
Astro-physicists see the big bang more as an The story of the universe still is instantaneous expansion that within a being written and refined. By all scien-few sect:nds created nuclear reactions tific accounts, it continues to expand, and produced the protons, neutrons, and the question of an eventual end and electrons that form the structure looms large in current investigations. of matter today. Not long after, the The universe itself provides some nuclear reactions stopped.
The uni- concrete support for the big bang the-verse was roughly one-quarter heli- ory in the form of cosmic background urn, three-quarters hydrogen—a ratio radiation, the "afterglow" of the cos-exhibited in the universe's oldest stars mic inflation. In 1965, engineerslooking today. The formation of the universe for the source of the static interfering played out over billions of years. Our with satellite communications found a own Earth, along with our solar sys- consistent signal emanating from ev-tern, is a product of a stellar explosion ery point in the sky at the wavelength almost five billion years ago. predicted for this radiation.
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