What did Hubble use to attempt to prove his theory?

Answer 1

he discovered that there were millions of other galaxies... making the universe unimaginably larger than previously thought. And he discovered that the light from distant galaxies is Red-shifted, and that the further the galaxy is, the more red-shifted its light. This not only demonstrated that the universe was expanding... It ultimately led to the formation of Big Bang theory by working out this expansion in reverse.

Answer 2

This is an excellent question, and I am not yet convinced that the evidence is being correctly interpreted. This is an admission of ignorance on my part, and not a claim that I have evidence to the contrary. One of the first indications that scientists used to claim accelerating expansion of the universe is the fact that the farther away an observed galaxy is, the more red-shifted the light is that we see coming from that galaxy. This observation is at present a well-documented principle strongly suggesting that the universe is (or was) expanding. However, by itself it is not proof that the expansion is accelerating. Assume for a moment that billions of years ago, the expansion of the universe was much faster than it is now, but the expansion is slowing down. There is no requirement that expansion must be acclerating; we can easily imagine expansion that is steady, or that is slowing down. If the universe is still expanding, but the expansion is in the process of slowing from a previously much higher velocity, wouldn't we still observe red-shifts in the more distant galaxies? Relative to us, they would be moving away more rapidly the more distant they are. But the truth is that this red-shift evidence by itself would be observed whether the universe's expansion is increasing in velocity or slowing down. Some (not all) other kinds of evidence seem to be dependent on this assumed red-shift interpretation for their own verification, which is a bit troublesome if you think about it. There is the added problem that our observations of the most distant galaxies are millions, or even billions of years old; we are not observing what is happening with those galaxies now, whatever that might mean.

Answer 3

The most important thing that Hubble discovered was that our universe is expanding. He could see this because he noticed that galaxies were moving apart (which he figured out by their red shifting). In fact, the expansion of our universe is speeding up and galaxies are moving apart faster and faster.

Answer 4

Every galaxy outside of our local group of galaxies, in all directions, is receding from us.

And the farther a galaxy is from us now, in any direction, the faster it's receding from us.

Answer 5

Edwin Hubble DID NOT PROVE that the universe was expanding.

What Hubble DID do was to demonstrate that the light from distant stars and galaxies is "red-shifted" - the spectrum of the light was shifted to longer wavelengths and lower frequencies. He demonstrated that the amount of the red-shift is dependent on the distance, so that more distant objects have a greater redshift.

Hubble also suggested a mechanism for this; that the universe is expanding in all directions, and that's the REASON for the red shift. Nobody else has been able to come up with a better explanation, and so most scientists accept this reasoning. But reasoning isn't proof, even though far too many scientists think that it is. We BELIEVE that the universe is expanding. But we always have to be willing to accept new data, and it's possible (however unlikely) that new data will someday cause us to discard the notion of universal expansion.

Answer2:

Hubble DID NOT BELIEVE that the universe was expanding. Hubble saw the red shift as an "hitherto unrecognized principle of nature". The red shift is ratio of v/c where v is the gravitational induced velocity field, v = (GM/r)^.5 and v/c = (GM/r)^.5/d. The red shift is larger when the closer to the mass M and larger when the mass is larger. Mercury has greater velocity and red shift than earth be cause it is closer to the sun. Einstein's Relativity is flawed, the sun has a velocity field around it, the earth has velocity v=30 km/s whether the earth is here or not, the sun's velocity field makes any mass at this range that speed. The farther away from the mass the smaller the velocity.

The Universe might be expanding like an excited atom, where the electrons jump to a higher level away from the nucleus and lower speed. The Universe might be acting like an atom in "expanding", and having a lower energy configuration.. The highest energy is when the velocity is v=c, this occurs when the size of the Universe is smallest. When v is less than c then the universe is not at its highest level of Energy.

The General formula for Energy is W =-mGM/r + cP = [-vh/2pir, cP] where cP is the vector energy and the so-called "Dark Energy". The vector energy keeps the earth from falling into the sun, cDel.P = - cp/r cos(P) = -cmv/ct cos(P)= -mv/t cos(P) = -ma cos(P), this is the Divergence of the Vector energy and the centrifugal force, that keeps the planets in orbit.!

Answer 6

The distance to a galaxy and the red shift of its light are both enormously hard to measure.

Hubble spent enough years at it, and laboriously eked out the distances and red shifts of

enough galaxies, that a pattern began to emerge from the data ... that the farther away

from us a galaxy is, the faster it's moving even farther away from us, regardless of what

direction you look. The "Expanding Universe" is the popular label for that pattern, which is

now well established.

Answer 7

Edwin Hubble discovered many things:

• The Universe is bigger than just our Galaxy.
• That galaxies are getting further away with distance.
• Asteroid 1373 Cincinnati

Answer 8

that galaxies have redshift and therefore the universe must be expanding. this is where he derived His Constant. also. by discovering cepheid variables in the great Andromeda nebula, he proved that it was a separate GALAXY from the Milky Way and increased the size of the universe from just our own galaxy to hundreds of millions of galaxies.

So he was a fore runner in cosmology and helped astronomy in that the universe IS bigger than was previously thought in the 20s

Answer 9

his findings led to discovery that there are other galaxies outside are own, that those galaxies are red shifted moving away from us, that the universe is expanding, and that cepheid variables are used on the distance ladder to determine distances to other galaxies

Answer 10

Hubble demonstrated that the light from distant stars and galaxies is "red-shifted" - the spectrum of the light was shifted to longer wavelengths and lower frequencies. He demonstrated that the amount of the red-shift is dependent on the distance to the star, so that more distant stars have a greater redshift.

Hubble also suggested a mechanism for this; that the universe is expanding in all directions, and that's the REASON for the red shift. Nobody else has been able to come up with a better explanation, and so most scientists accept this reasoning. But deduction isn't proof, even though far too many scientists think that it is.