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What states that all matter and energy in the universe exploded ten to twenty billion years ago and began expanding in all directions.?
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What are the three predictions of your Universe?
The "Big Crunch" idea was that the expansion would eventually stop and the universe would collapse. All evidence today says no way. The "Yo-Yo" says the universe repeatedly expand, collpses and then expands again of a roughly 70 billion year cycle. There is no evidence for this. The "Big Rip" says the universe will simply expand forever, with other galaxies gradually getting so far away that they fade in the distance, and then stars burn out and everything gets cold and dark forever.
What happens when you reach the edge of the universe?
The Universe is approximately 14.6 billion light years across (radius), which gives a total of around 30 billion light years from edge to edge. The Universe came to exIstence 14.6 billion years ago and has been expanding ever since. The expansion process occured very rapidly and exponentially, resulting in expansion close to the speed of light, 3 * 10^8 meters per second. Therefore, the edge of the Universe, from the center, would be around 14.6 billion light years away, theoretically. It turns out that these theoretical calculations are accurate, as astronomers have recently detected the light from stars around 14 billion light years away. As the Universe ages, it will expand even more quickly due to the effects of dark energy.
What theory explains why the universe is expanding at a great speed?
The cosmological theory holding that the universe is expanding, based on the interpretation of the color shift in the spectra of all the galaxies as being the result of the Doppler effect and indicating that all galaxies are moving away from one another.The cosmogonical theory holding that a violent eruption from a singularity led to the formation of elementary particles, the subsequent formation of hydrogen and helium, and the dispersion of the galaxies from these elementsSkaterboy15
What actually formed the universe?
The Big Bang BIG BANG was formed in 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded. Most astronomers use the Big Bang theory to explain how the universe began.
How is it possible that the universe could have existed for an infinite amount of time in the same state if galaxies are continuously receding from each other?
The universe has not existed in the same state for an infinite amount of time, that would be the steady state theory, which has been replaced by the big bang theory. The galaxies are moving away from each other because the universe is expanding at an increasing rate. It has been expanding since the big bang happened 13.7 billion years ago.
What does the red shift tell us about the changing universe?
Mainly that the Universe is expanding. Analyzing far-away galaxies, it has recently become clear that the expansion is accelerating - the Universe is now expanding faster than a few billion years ago.
how many stars are in th sky?
approximately 200 billion trillion stars in the universe.
What is the percentage by which the universe may be expanding every billion years?
The current rate of expansion of the Universe is such that distance would double after 14.4 billion years, so in a billion years, distance would increase by a factor of 1/14.4. About 7%.
Will the expanding universe collapse?
That's a possibility; but the observational evidence shows that the Universe is expanding faster and faster - and it seems likely that this tendency will continue in the future. It seems likely that the Universe will continue expanding exponentially, doubling in size every 10 billion years or so. Thus, it doesn't seem as if it will collapse again.
When and how do sciensits think the universe was formed?
it happened about 13.7 billion years ago by the big bang when everything started expanding
What are facts about the universe?
its 13.7 billion years old it covers every area of space its constantly expanding has 5 dimensions
How do you know that the universe is 13 billion years old?
This is mainly an extrapolation of the expansion of the Universe. That is to say, the Universe is expanding at such a rate that the galaxies (or the matter that didn't convert to galaxies yet) would have been very close together 13 or 14 billion years ago.
How vast is the universe really?
It depends on exactly what you're measuring. The vast majority of cosmologists (that is, essentially all except for a few kooks) think that the universe is expanding. That, coupled with the speed of light, means that the most distant objects we can see appear to be at the distance they were from us several billion years ago, and since the universe is expanding, "now" they are further away than that. The observable universe is a sphere around 28 billion parsecs in diameter. The observable universe is itself expanding with time. However, for complicated reasons the observable universe (that part of the universe we can see) will eventually stop expanding, at a diameter of about 38 billion parsecs. Anything outside this distance is moving away from us faster than the speed of light (because of the expansion of space itself), and its light can never reach us. For details, please refer to the link in the "Related Links" section.
What are the three predictions of your Universe?
The "Big Crunch" idea was that the expansion would eventually stop and the universe would collapse. All evidence today says no way. The "Yo-Yo" says the universe repeatedly expand, collpses and then expands again of a roughly 70 billion year cycle. There is no evidence for this. The "Big Rip" says the universe will simply expand forever, with other galaxies gradually getting so far away that they fade in the distance, and then stars burn out and everything gets cold and dark forever.
Is every thing in this universe is matter?
4 billion years ago there was nothing; then everything exploded into existence and the universe was born, but a new generation of cosmologists are questioning this theory. Cosmologists have created a replica of the universe by using equations; it's called the standard model of cosmology and it's the reason behind the Big Bang theory; however, this model is now doubted. Professor Alan Guth's theory challenges the Big Bang by stating that the universe started out small, allowing the temperature to even out everywhere, before expanding on a massive scale.
How deep is the universe?
From our perspective the most distant galaxies we can see in any direction are roughly 20 billion light years away. The precise topology of the universe is not really that of an expanding sphere. There may well be nothing--not even nothing--beyond the "edge" of the universe.
What is the radius of big bang?
The Big Bang is the name of an explosion which is believed to have taken place 13.8 billion years ago, and which created the universe as we know it. That explosion is still taking place, since the universe has never stopped expanding (and it is expected that it never will stop expanding, either). The radius of the Big Bang is therefore the same as the radius of the universe. The radius of the universe is thought to be roughly 14 billion light years. (Note that during the inflationary period, the universe expanded faster than the speed of light due to the creation of space, rather than the velocity of the matter involved.)
