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).
quadrillian years ago when the big bang happened but other scientists say the big bang was created when a univers collied with another univers which then created our galaxy in a different univers so mainly that's how it happened
Nobody discovered the universe. We have always known that the universe exists. Discoveries of how the universe works and what it is have been made by many people.
Well its made of matter and a whole other things that has not been discovered and will never ever ever ever ever ever ever be discovered because its impossible to find out.
The Hubble has discovered the fact that the universe is actually expanding faster than before, and this is caused by Dark Energy, another of the Hubble's discoveries
No, all land on Earth has been explored. However not all areas of the Ocean have been explored because we are not advanced enough in technology to go as deep as the Ocean floor is in some parts of the Ocean.
As of the 28th of January,2010, 429 exoplanets have been discovered. Exoplanets are those planets that orbit a star other than our Sun.Add that to the 8 planets in our solar system and you get a total of 437 planets discovered.
Nobody discovered the universe. We have always known that the universe exists. Discoveries of how the universe works and what it is have been made by many people.
Not every galaxy, star, and corner of the universe has been discovered, but we have discovered the universe as a whole. ------------------------- Most likely we never will since the universe is expanding at approximately 40 miles per second.
The universe was discovered by ancient Greeks and Indians, when theories of an impersonal universe governed by physical laws were first proposed.
Worm holes have not been discovered.
It was discovered by Hubble.
The universe is older than mankind and mankind evolved within the universe. So the universe could not be discovered.
Edwin Hubble
The Universe Is A Place That Might as Well Be A Spec to us and we have not discovered it but the universe is the solar system and beyond and different dimensions
it was Nicolaus Coppernicus who discoveered that the sun is the rest center of the universe
Meaning, as in, who discovered we were living in a series of universes? The universe was discovered by ancient Indians and Greeks, when theories of personal universes governed by physical laws were first introduced.
The universe was discovered by ancient Greeks and Indians, when theories of an impersonal universe governed by physical laws were first proposed.
cupercunicus- Actually it was Galileo