Energy for Expanding Universe
Name: David M.
I know that scientists believe that space is expanding.
What causes it to expand? If some kind of energy is involved, where does
this energy come from?
Hi, David !!
Well, at first, Einstein thought that the space was NOT
expanding, and used in his calculations a factor, named
COSMOLOGICAL CONSTANT - so that the expansion
would be cancelled.
Later on he understood that the expansion of the universe
really happens. His theory had showed him this fact !!!
The shift of the light to the red confirms this expansion.
The universe has a constant energy since the beginning.
Mankind has lost Fred Hoyle, the scientist who created
the expression "Big Bang" some weeks ago, at the age
of 86. He was against the idea of the "Big Bang" to explain
the origin of the universe. What really happens is a change
of energy from a type to another. Mass is a concentrated form of energy.
To explain the expansion of the universe, there is the theory
of spontaneous generation of matter, what means, mass
appears from energy to fill the space so as to contradict
the "Big Bang" theory.
But, anyway, the energy of the universe is constant. It was
already there at the beginning and is still there today.
All that happens is a change in the form of energy.
all the best !!!
Scientists do not really know why space is expanding. Measurements and
observations are best explained by considering the universe to be expanding.
There are a variety of possible explanations, although we do not know
whether any are correct.
The most popular is the Big Bang Theory. It is possible that many billions
of years ago the universe exploded like a super-giant hydrogen bomb. The
atoms of the universe were formed from this excessive energy of the
explosion. Small atoms merged together to form stars. Some atoms joined
together into larger atoms, which became molecules and then planets.
Everything was flying apart, and still is. Now, however, things are not
flying apart as fast as when the explosion first occurred.
Some theories say the universe will continue to fly apart forever. Some say
it will one millennium stop expanding and start contracting together again.
No scientist knows for sure.
Dr. Ken Mellendorf
Illinois Central college
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Update: June 2012