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Evidence that the universe is expanding is best provided by the?
Wiki User
∙ 11y ago
The main piece of evidence is the redshift of galaxies. In spectroscopy an absorption line that is redshifted indicates that the object is moving away. The farther the object is from the source of observance the faster that object travels in relation to the observer. Almost all galaxies are redshifted as opposed the our local neighborhood, the Andromeda Galaxy for instance is blueshifted because it is heading strait for us. at some point all galaxies will spread so far from each other that they will be going so fast that they reach the speed of light in respect to our position and are never seen again. Another piece of evidence is the fact that their is some warmth in space. Also known as the Cosmic background radiation. Empty Space is around 2.7 degrees kelvin which is the residual heat from the big bang. Had their not have been an explosion with a massive amount of heat and energy and everything simply was, then empty space would be absolute zero. This is the two strongest arguments that support the big bang theory.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoThere are several pieces of evidence. The primary one would probably be the redshift of distant galaxies. This is a change in frequency in the light, and it is usually interpreted as the result of the Doppler effect - meaning that distant galaxies are systematically moving away from us. In other words, the Universe is expanding.
Wiki User
∙ 11y agoThe most direct evidence is that the light from all distant galaxies have a red shift, and the degree of red shift depends on the distance between us and the distant galaxies. This is an irrefutable fact about our Universe, and can only be explained by an expanding Universe.
But there is also direct evidence that the universe was once smaller than it is now.
Wiki User
∙ 11y agoIn simplest terms, it is an irrefutable fact of our Universe that the distance between us and all distant galaxies is increasing, and that the rate at which that distance is increasing depends only on the distance between us and those distant galaxies. This fact can only be explained by an expanding Universe.
Wiki User
∙ 11y agoI've heard people say that in the beginning of the universe (the big bang theory) the universe has been growing and expanding. However, some say that in the future, the universe will squish together and explode, creating a new universe...weird.
Wiki User
∙ 11y agoThe redshift of distant galaxies, and the fact that the amount of the red shift depends on the distance between us and those distance galaxies. Hubble Expansion is the only explanation that fits the observations.
Wiki User
∙ 6y agoThe expanding universe is a complex topic and there are thousands of excellent websites devoted to it at every level. Briefly, in 1929 the American Astronomer Edwin Hubble made observations that the light coming from certain planets in distant galaxies, in their relation to one another, was indicating an increasing distance between them. The only explanation was that the universe was expanding.
You can learn more by exploring the many websites devoted to this topic.
http://www.pbs.org/wgbh/aso/databank/entries/dp29hu.html
http://skyserver.sdss.org/dr1/en/astro/universe/universe.asphttps://imagine.gsfc.nasa.gov/educators/programs/cosmictimes/
Wiki User
∙ 12y agoThe galaxies are moving away from each other.
Wiki User
∙ 14y agoThe most compelling evidence is the red shift shown by galaxies.
Wiki User
∙ 11y agoRed shift in the ligth from distant galaxies
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What space technologies provided scientists with the best evidence that the universe was created in the Big Bang?
a radio telescope
Is the vacuum of space protection for which the universe is against what it is that its expanding into. just like our world has an atmosphere to protect us against the vacuum.?
Since Time and space seem to have began with the big bang, we simply dont have any way of understanding anything outside of it . the best we can do is say that it appears that the universe is infinite in size and is expanding and accelerating. It looks like there is no end point of the universe.Its hard to accept . But it would be equally hard to accept if there was an end point. Its a great question but no one can really give an intuitive answer, sorry.
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."
What best describes the organization of the universe?
Fractals
The best evidence that the distance between the Moon and the Earth varies is provided by the apparent change in the Moon's?
Angular size. When the Moon is at perigee (closest approach to Earth) the Moon looks about 15% bigger than it does at apogee.
Which theory about the universes size best matches the experimental evidence found by astronomers and physicists?
The universe is consistantly expanding
What space technologies provided scientists with the best evidence that the universe was created in the Big Bang?
a radio telescope
What are the best indications that the universe is expanding?
A misunderstanding of red shift is the indicator is expanding. The correct understanding of red shift indicates the universe is in continuity, not expanding and is finite. RED SHIFT OF DISTANT GALAXIES.
In 1964 space technologies provided scientists with the best evidence that the universe was created in the Big Bang?
In 1964, the cosmic background radiation was discovered. This provided a strong confirmation for the Big Bang.
Which best dscribes the big bang theory?
Latest theory is that the universe is expanding.
What is the best evidence the universe is still expanding?
The redshift of distant galaxies, and the fact that the degree of redshift depends on the distance between us and those galaxies. What we observe can only be explained by Hubble Expansion.
Which of these facts is the best supporting evidence that the universe is expandingThe stars vary in chemical composition The galaxies can spin to form eddies. The universe is filled with galaxies of?
None of them. The best evidence is the redshift.
Select the best answer from the choices provided?
42, the answer to all questions about Life, The Universe and Everything!
What best explains the big bang theory?
The Big Bang Theory present the theoretical premise for the causation, termination, and continuation of an evolutionary expansion of the universe. The Big Bang promotes that the universe is Time bound (or has a finite existence), that the universe is expanding (within the dimensional limits of Space and Time), that the universe is evolving a set amount of matter and energy while it is expanding over time, and that the universe is homogeneous and isotropic with respect to Space and Time.
What is a best item to describe an increase in volume?
The universe: The further edges of the cosmological universe (or multiverse) is expanding, and thus increasing in the contained volume. Eventually, the volume will (and must be) described in all 10 dimensions.
The best evidence that Earth rotates is provided by the?
movement of Foucault pendulums and the Coriolis effect on air movement
Theoretically the universe will keep expanding and eventually even atoms' parts separate into pure energy so why could such energy not lose momentum then collapse and re-explode?
Great question. I can tell you that nobody knows for sure. The "current best answer" is that there is insufficient mass to cause the expanding universe to stop and come back together. In fact the expansion is accelerating!
