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What theory says to the universe is expanding at the great speed?
Wiki User
∙ 12y ago
In essence the big bang theory
Wiki User
∙ 12y ago
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What did Edwin hubble discover about objects in the universe?
That they are all moving away from each other at a great rate of speed and that speed seems to be acceleration.
When was the universe discovered?
In 1929 Edwin Hubble, working at the Carnegie Observatories in Pasadena, California, measured the redshifts of a number of distant galaxies. He also measured their relative distances by measuring the apparent brightness of a class of variable stars called Cepheids in each galaxy. When he plotted redshift against relative distance, he found that the redshift of distant galaxies increased as a linear function of their distance. The only explanation for this observation is that the universe was expanding.Once scientists understood that the universe was expanding, they immediately realized that it would have been smaller in the past. At some point in the past, the entire universe would have been a single point. This point, later called the big bang, was the beginning of the universe as we understand it today.The expanding universe is finite in both time and space. The reason that the universe did not collapse, as Newton's and Einstein's equations said it might, is that it had been expanding from the moment of its creation. The universe is in a constant state of change. The expanding universe, a new idea based on modern physics, laid to rest the paradoxes that troubled astronomers from ancient times until the early 20th Century.Properties of the Expanding UniverseThe equations of the expanding universe have three possible solutions, each of which predicts a different eventual fate for the universe as a whole. Which fate will ultimately befall the universe can be determined by measuring how fast the universe expands relative to how much matter the universe contains.The three possible types of expanding universes are called open, flat, and closed universes. If the universe were open, it would expand forever. If the universe were flat, it would also expand forever, but the expansion rate would slow to zero after an infinite amount of time. If the universe were closed, it would eventually stop expanding and recollapse on itself, possibly leading to another big bang. In all three cases, the expansion slows, and the force that causes the slowing is gravity.A simple analogy to understand these three types of universes is to consider a spaceship launched from the surface of the Earth. If the spaceship does not have enough speed to escape the Earth's gravity, it will eventually fall back to Earth. This is analogous with a closed universe that recollapses. If the spaceship is given enough speed so that it has just enough energy to escape, then at an infinite distance away from the Earth, it will come to a stop (this is the flat universe). And lastly, if the ship is launched with more than enough energy to escape, it will always have some speed, even when it is an infinite distance away (the open universe).
How can the universe be 156 billion years in diameter if it is only 14 billion light years old?
The diameter must be expressed in a unit of distance/length - for example in light-years - NOT in years. The answer is that the distant parts of the Universe are going away from us, faster than the speed of light. Inside its own local space, nothing can move faster than the speed of light. But in the case of the expansion of the Universe, you might say that space itself is expanding. This makes it possible for objects to move away from us faster than light.
If the universe is everything and scientists say that the universe is expanding what do you think it is expanding into?
The universe does not expand into anywhere, it is expanding everywhere at every moment. The Newtonian view assumes instant communication of the gravitational field. In such a case, one could pose that the kinetic energy of all the matter in the universe speeding off in all directions is equally balanced by gravitational potential energy that would bind all matter together. I suppose this works when the universe was very close to the size of a singularity. However, the force of gravity travels at the limited speed of light by force carriers called gravitons. So by the time a graviton travels from one side of the universe to the particles on the other side, the particles on the other side have traveled even further away. This would make the gravitational force of a particle felt by particles on the other side of the universe seem weaker than in the pure Newtonian scheme. This is like slowly reducing the force of gravity as the universe expands. Wouldn't this have the tendency to make the particles fly apart more rapidly since you are slowly eliminating the opposition of gravity? Or at least it might help ensure that the universe expands forever.If we throw in a particle horizon where some particles have not yet even felt the gravitational force of other particles very distant from us, this could contribute to expansion. The expansion rate is accelerating, however, which requires some new form of energy we currently know next to nothing about. Hence, it is called "dark energy," and accounts for about 75% of the total mass/energy of the universe.It is possible our universe has an event horizon where more and more distant objects are accelerated to the speed where we will never again see them or feel their gravitational force.The term "expanding universe" is not really the best choice of words, because it does imply expansion INTO something. The universe is, by definition, EVERYTHING that exists. So there is nothing outside of the universe however big or small you conceive it to be.The term "expansion" in this case is meant to imply that there is new space being created between sub-atomic particles throughout the universe as a result of the force from a "Big Bang" being (temporarily) stronger than the pull of gravity. Many different theoretical models have been proposed, but the leading model at the present time is known as the "hot inflationary big bang." The evidence for the big bang consists primarily of galactic red shifts, which increase with distance, and the cosmic background radiation which permeates interstellar space--the so-called 3° K microwave temperature.AnswerIt all started with Albert Einstein's theory of relativity. The theory showed that the universe could expand or contract, which opened the door to the Big Bang theory. Hubble's redshift is an indicator that the universe is in equilibrium between the centripetal force of gravity mg= mv^2/R=mMG/R^2 and the centrifugal force due to velocity -mcDel.v= -mcv/R cos(v). Conservation of energy causes these forces to be equal and mV^2/R=mcv/R cos(v) gives:v/c=cos(v)=z the redshift.At v=c the cos(v) is 1 and the mass is traveling radially. The larger the velocity, the larger the redshift v/c = cos(v).The redshift is the consequence of the Conservation of Gravitational Energy or the Boundary of energy or the Limit of energy or the Continuity of energy, etc, in short the first derivative of the energy set to zero, the Invariant Condition.This can be derived by revising Newton's Gravity theory E= -mMG/R by adding the vector energy mcv giving E= -mMG/R + mcv, this is I call the Quaternion Gravitational Energy as it is the sum of a real and vector energy, ala William Rowan Hamilton's Quaternions.Einstein adopted Newton's Gravitational energy and had to add the "cosmological constant to account for the centrifugal force, or the fact the fact the universe had not collapsed due to Newton's Gravity.The so-called "dark energy" is the vector kinetic energy given by mcv. Today we could call the gravitational Energy E= -mu/R + mcv the 4-vector energy momentumP = E + pc= E + mvc.AnswerThe observational evidence is such that we see "stuff" of similar type, at similar distances "back in time", in all the directions we can look. A steady increase in metalicity as we approach our own age, CMBR temperatures similar to the "Hubble shift" and so on. Distant objects are anomalously large, as if they were being magnified by the size of the Universe they were in. This means that the most simple theory that does not require that we are in a "special place", is that all those other places see exactly the same thing we do.This means that there was no pre-existing empty space, the "Big Bang" really was no sort of Bang, and the distance between "super clusters" is increasing with time... what scientists call "gravitationally bound systems".ANSWEROn a vast scale, the space between structures in the Universe is increasing and the rate of increase is accelerating. This is supported by the best available observational evidence. The Universe is a self-contained, unbounded system. There is no external frame of reference to give meaning to the idea of its expanding into some "where."
Put the parts of the universe in order from largest to smallest?
Imagine our universe as a baloon. During the 'Big Bang', our universe was basically swirling hydrogen gases compressed in the center of the known universe. The explosion which ensued triggered many chemical reactions, eventually leading up to the formation of the planets and othere celestial bodies. Amazingly, scientists have found by studying galaxies millions of light years away that, like a balloon expanding they are getting farther away from our galaxy; ( Although the Andrmeda galaxy is pulled in by the gravitational effect of the Milky Way becasue of its closeness and will eventually collide with our galaxy.) What could they be expanding into? No one knows for sure. Three is a theory of a multiverse, where parallel universes exist throughout all of space. Interseting Note: If we ever wanted to get to the edge of our tgalaxy with any technology, we couldn't, even at what Einstein described as the nfinite speed of all energy; the speed of light. This is becasue not only is the universe expanding, but its expansion resulting from the big bang is accelerating as we speak!!!
What things are beyond the universe?
Nobody Knows. Even if we travel at the speed of light we still would die before we got to the end of the universe. Everybody says the universe is expanding, but what is it expanding into?
What are the universal things?
Nobody Knows. Even if we travel at the speed of light we still would die before we got to the end of the universe. Everybody says the universe is expanding, but what is it expanding into?
What does rapidly expanding mean?
increasing in mass at a great speed
Is the universe expanding faster than a Boeing 747 can fly?
In fact, distant parts of the Universe are moving away from us faster than the speed of light.
What would happen if the galaxies in the universe start expanding faster than the speed of light?
we would be all screwed
How universe is expanding at a rate faster than speed of light?
It is not. Nothing that we are aware of moves faster than light.
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 happend after a few seconds of the big bang?
Right after the big bang happened, the universe was expanding at a speed of light. While it was expanding, it started to cool itself down since the big bang caused the universe to heat up to ridiculous temperature.
Who was the astronomer that discovered the universe was expanding?
Edwin HubbleAnswer2:Hubble did not believe the universe is expanding. The universe is not expanding like the big bang, it is excited like an atom. The electrons jump to a higher level and lower their speed. The lower speed is a lower energy state, the max energy is when v=c.Hubble;s relationship v=HD indicates the distance D from the max energy state, where v = c.Hubble's Constant is dR/Rdt =c/R =H = 300M/150TT = 2E-18 m/s x31E21 = 62km/s/Megaparsec.
How is it possible that the expansion of the universe is faster than the speed of light?
Relativity theory establishes a speed limit for objects travelling through space - but the expansion of the universe is the expansion of space. There is no speed limit for that expansion.
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.
Why does the height of space increase?
The universe is at an expansion stage as visible now. Space is increasing faster than the speed of light. This can be explained by the Big Bang Theory because when the big bang occured space was sent flying in all directions at relativistic speeds. It has also been theorized that the universe at one point will stop expanding and begin to diminish.
