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That is the idea that at some very early stage of its development (a fraction of a second after the Big Bang), the Universe expanded extremely fast.
That is the idea that at some very early stage of its development (a fraction of a second after the Big Bang), the Universe expanded extremely fast.
That is the idea that at some very early stage of its development (a fraction of a second after the Big Bang), the Universe expanded extremely fast.
That is the idea that at some very early stage of its development (a fraction of a second after the Big Bang), the Universe expanded extremely fast.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoThat is the idea that at some very early stage of its development (a fraction of a second after the Big Bang), the Universe expanded extremely fast.
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Which theory of universe formation was proposed in 1980?
The inflationary hypothesis was developed in the 1980s by physicists Alan Guth and Andrei Linde. Inflation explains the origin of the large-scale structure of the cosmos. Quantum fluctuations in the microscopic inflationary region, magnified to cosmic size, become the seeds for the growth of structure in the universe. Many physicists also believe that inflation explains why the Universe appears to be the same in all directions (isotropic), why the cosmic microwave background radiation is distributed evenly, why the universe is flat, and why no magnetic monopoles have been observed.
What is cosmic inflation and how does it solve the horizon and flatness problems?
First, let's define terms. The "horizon problem" is the fact that the observable Universe is too uniform. If one does calculations based on simple Big Bang Cosmology -- ie, that the present rate of expansion ("Hubble Expansion") is the rate that has existed since the start of time -- then our Universe did not have enough time to reach the mass density uniformity we see today. It's as if we, while planning to make some iced tea, placed a pan of boiling water a meter away from a pitcher of ice, turned away for one second, and then found the water in both containers was now at room temperature. You'd have every right to ask, "How did they reach equilibrium that quickly?" The "flatness problem" is the fact that the mass density of our Universe is SO CLOSE to the amount that permits stars to form. A Universe more dense than ours would have collapsed in on itself in less than a billion years, and a Universe less dense would have resulted in matter so thin that galaxies would have never formed. In both cases, no heavy elements would have formed in rings around stars, meaning no life could exist. The ratio of the actual mass density and the density that would permit life in our Universe is called Ω. Again, if one does calculations based on simple Big Bang Cosmology, Ω can differ from one by less than 10^-16 (yes, that's a decimal point followed by FIFTEEN ZEROES!), or no life should exist in our Universe. Inflation simply states that, prior to the Hubble Expansion we now see, our Universe was sufficiently dense for a long enough time that it could reach mass equilibrium, which was then followed by a rapid expansion ("Inflation"), which was then followed by Hubble Expansion. If one does the calculations based on an inflationary model, one finds that Ω can differ from one by almost any amount, but will eventually reach near unity when inflation ceases. From then on, Hubble Expansion can continue with Ω being the number we see. Inflation solves other problems as well; but it also makes predictions about what we would see in our present Universe. Specifically, we would see anisotropies in the Cosmic Microwave Background Radiation of a certain size, but no larger. So far, all observations of the CMBR fail to rule out the Inflation Model.
What is the moment in time when the universe started to expand out in an extremely hot dense state?
yes *Our whole universe was in a hot, dense state. It's a line from a song by the Barenaked Ladies called The Big Bang Theory, created as the opening song to the show The Big Bang Theory.
What are the 3 forms of evidence supporting cosmic inflation?
Permit me to do an interlude that should help understand how the Inflation Model came about. Let's say you come back to your house one evening and you notice that a window is smashed in. You thus make the hypothesis that someone broke into your house. After you enter the house, you notice muddy footprints going from this window to where you store your jewelry, AND that your jewelry is gone. Your initial hypothesis now fully explains three different facts that you notice about your house. Your insurance agent, however, insists that none of these facts PROVES that you were robbed of your jewelry. Indeed, she demands that you test the mud on your floor to see if it matches the mud just outside your window -- noting that, if the mud doesn't match, then your hypothesis that someone broke into your house and walked to your jewelry box could not be true. You do the test, and find that the mud does match. The above sums up the present state of the Inflation Model. The idea was first developed by Alan Guth in 1979, and he made this model to explain why there are no magnetic monopoles in our Universe. Later researchers noted that the Inflation Model also explains why our Universe is so uniform in its mass density AND how that mass density ended up so close to the density that permits life in our Universe. The latter question is important, because if we start with simple Hubble Expansion, then a Universe just 10^-16 more dense, or 10^-16 less dense, would result in no life in it. None of the above PROVES Inflation, any more than the three facts about your house PROVES that you were robbed. However, it is significant that one assumption is CONSISTENT with all three observations, and it is difficult to explain even one without that assumption. Furthermore, the Inflation Model makes specific predictions about the size of anisotropies in the Cosmic Microwave Background Radiation. If these are found to be larger than a certain size, then inflation can not be true. Measurements on these anisotropies have been done, and they have failed to disprove the idea. Again, this is not a PROOF of inflation, but scientists do like an idea that easily solves a lot of problems AND is consistent with experiments. Scientists that argue against the Inflation Model are beginning to sound like the insurance agent who refuses to agree that you've been robbed.
How do chemicals affect the inflation of a balloon?
Inflation of a balloon is NOT a chemical reaction, so there are no chemicals involved in 'affecting' it.
How did the size of the universe change?
In the immediate aftermath of the "Big Bang" there was rapid inflation of the universe. That slowed and the universe is now believed to be still, slowly, expanding.
How did cosmic inflation resolve the flatness problem?
The cosmic inflation did resolve the flatness problem by the theory which states that the universe appears to have a flat geometry.
What belief is at the core of chaotic inflation theory?
that the early universe underwent a period of unusually rapid expansion
What was a problem with the Big Bang theory?
Several problems that were found with the Big Bang theory were solved by cosmic inflation. I suggest you read about cosmic inflation. One of these problems was the fact that the Universe is fairly homogeneous. Without inflation, it wouldn't have had time to "spread out" any irregularities.
HOW WAS THE UNIVERSE CREATED?
God made it.
Which of these pieces of evidence supports the idea that inflation really happened?
observations of the cosmic microwave background that indicate a flat geometry for the universe
Which theory of universe formation was proposed in 1980?
The inflationary hypothesis was developed in the 1980s by physicists Alan Guth and Andrei Linde. Inflation explains the origin of the large-scale structure of the cosmos. Quantum fluctuations in the microscopic inflationary region, magnified to cosmic size, become the seeds for the growth of structure in the universe. Many physicists also believe that inflation explains why the Universe appears to be the same in all directions (isotropic), why the cosmic microwave background radiation is distributed evenly, why the universe is flat, and why no magnetic monopoles have been observed.
The universe how big is it?
This is an area of active research... meaning, nobody really knows. The visible Universe has a radius of about 46 billion light-years. According to the "inflation" theory (basically, the modern version of the Big Bang theory), the total size of the Universe MIGHT be millions or billions of times bigger.
How big is the Universe?
This is an area of active research... meaning, nobody really knows. The visible Universe has a radius of about 46 billion light-years. According to the "inflation" theory (basically, the modern version of the Big Bang theory), the total size of the Universe MIGHT be millions or billions of times bigger.
Were there any modifications to the big bang theory?
Yes, the Big Bang theory has gradually evolved. I will not talk here about wild speculations that are not generally accepted by the scientific community. However, one important additional to the theory, that is now generally accepted, is the cosmic inflation. There are strong reasons to believe that - for reasons not yet entirely understood - during a very short time, the Universe increased tremendously in size - "exponentially", they say. Eventually this stopped - the Universe is still expanding, but not at such a fast rate.While it is not known what caused this inflation (a hypothetical particle called "inflaton", it is said), the inflation does explain some things about the Universe that are otherwise quite problematic.
Why is our estimate of the size of the universe smaller than the observable universe?
Among other things, it would be a great coincidence that the Universe ends right where our instruments can no longer observe anything.Moreover, there are reasonings based on cosmic inflation, according to which the Universe must be at least a thousand times larger than the observable Universe. This is related to the isotropy of the Universe in the observable part. Any initial anisotropy must be spread out over a much, much larger region of space.
What is the paper folding theory?
The paper folding theory, also known as the folded paper model, is a concept used in cosmology to explain how the universe may have formed. It suggests that the universe began as a singularity and then rapidly expanded in a process known as inflation. This expansion can be visualized as folding a piece of paper, with one side representing the universe before inflation and the other side representing the expanded universe after inflation. The theory helps explain the observed uniformity of the universe on a large scale.
