According to the Big Bang theory, the universe was formed by an expansion of space, not an explosion of matter. An explosion of matter would be an expansion of matter into a preexisting space. There was no preexisting space, other than the singularity (or almost-singularity) that the Big Bang started with.
Further according to the Big Bang theory, there wasn’t any matter to start with. It was all energy. By Einstein’s equivalence theorem, E=mc2 , some of the matter turned into energy as space expanded.
The universe was small in size to begin with, but it had all the matter, in the form of energy, that the present universe has.
Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.
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Answer:
According to the Big Bang theory, the universe was formed by an expansion of space, not an explosion of matter. An explosion of matter would be an expansion of matter into a preexisting space. There was no preexisting space, other than the singularity (or almost-singularity) that the Big Bang started with.
Further according to the Big Bang theory, there wasn’t any matter to start with. It was all energy. By Einstein’s equivalence theorem, E=mc2 , some of the matter turned into energy as space expanded.
The universe was small in size to begin with, but it had all the matter, in the form of energy, that the present universe has.
Answer:
Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.