I dont understand the question and if I did I dont't think I would know the answer. Its for science homework.
2007-02-18 05:26:08 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
To answer this, we need to understand what Big Bang Theory and the observed expansion of the Universe are.
Let's start with Big Bang Theory. The idea is that a long time ago (13.7 billion years by the currently favoured cosmology) the Universe came into existence quite suddenly and at quite a high temperature (so high, in fact, that our theories of physics are not valid). It is essential to understand that the Universe was at that point, and still is, infinite in extent. Due to the high temperature, the Universe immediately started to expand. It has continued to expand to this day.
Many people are confused as to how an infinite universe can expand or where it expands to. The answer is fairly simple and is well described by an analogy. Consider an elastic band of length L. As you pull on its ends, it stretches to a length rL where r>1 is a dimensionless constant representing the expansion. Any two points on the band separated by distance X will now be separated by rX, independent of their positions with respect to the ends of the band. Thus we can let the total length L become very large, and the local effects of the expansion are unchanged. Even if L becomes infinite, we can still vary the parameter r and achieve the local effects of expansion.
Now, what is meant by the observed expansion of the Universe? Well, when we look at distant galaxies, we notice that they all seem to be moving away from us. This is true no matter which direction we look. Moreover, the further away a galaxy is, the faster it seems to be receding (this is the Hubble Law).
To connect the two concepts, I suggest you perform the following experiment. Take an elastic band and cut it so that it no longer forms a loop. Take a marker and draw several dots on it. Now stretch the band and observe the effect on the relative positions of the dots. If you were an astronomer living on one of the dots, how would the other dots appear to move with respect to you?
2007-02-18 05:50:46 · answer #1 · answered by Matthew S 2 · 0⤊ 0⤋
It has been taught the Big Bang started from a very small part in the universe of nothing, the question is where did that very small part come from when nothing was there to start from, In fact there never was a very small part because GOD made everything and GOD always was . The expansion of the universe is thought to be like foam expanding outward and then the scientist think it may collapse into itself. The fact is no one will be around to see it. The planets are to far for anyone to get to much less live on, who wants to live in a closed in box all there life on a planet where you can't go out on as earth. Back to the Big Bang, there never was a Big Bang and no one cane prove it was. Don't let it worry you. Keep your eyes on GOD and you will be fine, when you pass on you can ask GOD in person, Good Luck and GOD Bless.
2007-02-18 05:43:38 · answer #2 · answered by Anonymous · 0⤊ 1⤋
Apparent expansion of the Universe is not exactly explained by the Big Bang theory except it postulates expension with out concrete reason.
However it has been alluded by cosmology that the cosmological constant of Einstein in his Field equation of GR. that there exists a power ,responsible for the motion implied & called dark power x dark time which is refered to as dark energy ,to be causing the expansion of the Universe.
2007-02-18 06:53:05 · answer #3 · answered by goring 6 · 0⤊ 0⤋
If you see some particles that are all moving away from each other, that means that at some time in the past, they were probably all close together. That is very basically what the big bang explains.
Edwin Hubble, around the 1920's or 30's, saw that all the galaxies were moving away from each other. So he deduced that they used to be in one big clump. That started the ball rolling.
2007-02-18 05:42:40 · answer #4 · answered by Anonymous · 0⤊ 0⤋
For that they insist on saying that the Universe had a beginning of Big Banf, and goes to have an end, would only be necessary that the same ones explained with well clear and transparent arguments, the meaning of the life for the infinite before the beginning, and the meaning of the life for the infinite after the end.
2007-02-18 05:36:03 · answer #5 · answered by britotarcisio 6 · 0⤊ 1⤋
Simple
An explosion always moves OUTWARD or EXPANDS
And IMPOLSION moves inward.
BANG indicates and EXPLOSION
Unless you are re-writing the dictonary and if so, do you have a proof to justify your new defination.
2007-02-18 07:36:44 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Pretty much. Super inflation.
2007-02-18 05:33:48 · answer #7 · answered by Anonymous · 0⤊ 0⤋