ipl-logo

Edwin Hubble's Expansion Of The Universe

889 Words4 Pages

There is not much that humans know about the universe. We do not why it was created, how big it is or if it will last forever. However, as technology progresses there is much that is begin found out. For instance, scientist speculate that the universe is expanding. This amazing discovery was brought to attention by Edwin Hubble in 1920 (accel univer+ cosmo constant). Hubble was able to determine that the universe was expanding by observing the distances and velocities of several different galaxies. Through his observations, Hubble was able to quantify his observations and determine that the universe was infact expanding. Not only that, but that the universe was actually accelerating (Hubble’s Law). Meaning, the expansion of the universe was …show more content…

The paper demonstrated that galaxies are moving away from us “with a velocity that is proportional to their distance from us.” (Hubble’s Law). In other words, the further a galaxy is away from us, the faster it will distance itself. Hubble also manage to create a velocity vs. distance graph from his observations, through this graph, Hubble’s law was created. Hubble’s law is as follows: v=H0d,where v is velocity, d is distance, and the slope H0 is the Hubble Constant. Hubble was about to distinguish between the near galaxies and the further ones since further away objects are dimmer than objects near by.Thus, revealing a linear relation between galaxy velocity and its distance (Hubble’s Law). This demonstrates that galaxies “recede from each other at a constant speed per unit distance” (Hubble’s Law). Which, again, means that the further the galaxy is, the faster it will …show more content…

By comparing the light of far away and near by supernovae, similar to how Hubble compared galaxies, they found that far away supernovae was 25% more faint than it was suppose to be (Supernovae, an accel universe). In other words, the far away supernovae were too far away, thus it was founded that the universe had been accelerating for about the past eight billion years. Of course comparing the redshift (red wavelengths admitted from the supernovae explosions) of supernovae was not an easy process, especially since supernovae are pretty rare. For instance, our galaxy may produce a supernovae every 400 years. (Core

Show More
Related
794 Words | 4 Pages

However, the Universe was insanely hot (billions of degrees), so it is bursting with energy. With that intense amount of energy, “...the Universe expanded explosively, perhaps faster than the speed of light.” Afterwards, the cooling Universe began a series of “phase changes.” During the first second of its existence, distant forces like electromagnetism and gravity forms. At first, the universe was so roughed that particles destroyed themselves, resulting in pure energy.

Read More
410 Words | 2 Pages

Astronomy Project Note Sheet Grace: What is dark matter and dark energy? The universe is approximately 68% dark energy, 27% dark matter, and 5% normal matter. Dark Energy: Scientists do not know a lot about dark energy, and this is ironic because it makes up most of our universe.

Read More
1028 Words | 5 Pages

But when the twentieth century was at the gates of new and historical events, that began to change. New discoveries shook the old certainties and paved away for questions about "where the universe came from?". One observation transformed our ideas about the true scale of the universe. It began with a mystery in the sky. By the early part of the twentieth century, it was well known that our solar system lay within a galaxy, the milky way.

Read More
680 Words | 3 Pages

Nebular Hypothesis is the most widely used theory of how the world became. Most scientists believe that the earth is 4.5 billion years old. The theory of nebular hypothesis says that our solar system consisted of a giant cloud of gas and dust then collapsed. Factors such as heat and pressure caused a big ball and formed a “protoplanetary disc”.

Read More
157 Words | 1 Pages

We had been given an idea and studies further into it to see what actually happened. Ancient Greece searched for ideas on how th universe works, the same as we do today. They developed the begining of physics studied

Read More
816 Words | 4 Pages

Dark Matter halos surround individual galaxies and groups or clusters of galaxies and its properties are only inferred to exist due to the gravitational effects it has on visible matter. Dark matter in the halo is inferred through the gravitational effect imposed on a spiral galaxy’s rotation curve. Evidence for dark matter is also found through observations of the motions of galaxies in groups and clusters. Within galaxies the velocities of galaxies in groups and clusters are so high that the groups or clusters would fly apart if the luminous matter were present. The large amount of mass throughout the halo means that the rotational velocity of the galaxy doesn’t decrease at large distances from the galactic centre.

Read More
410 Words | 2 Pages

How was Hubble important to our understanding of galaxies? He was first to prove the expansion of universe and he classified galaxies. He is also known for providing evidence there were actually galaxies beyond the Milky Way. 4.

Read More
599 Words | 3 Pages

They had detected evidence for a relic blackbody radiation in agreement with the Big Bang theory rather than the temperatures and radio sources in space. The first scientists that came up with the theory Alpher, Herman, and Gamow were not credited for their work, because the scientific community felt the hypothesis uncertain. Later Dicke and Peebles published a similar theory just to find out the first one had been buried with a lack of emphasis on their calculations. In 1965 when the theory was proved in the Astrophysical Journal they merely mentioned the first article, not really crediting them for the original theory.

Read More
304 Words | 2 Pages

The Big Bang Theory is the main accepted explanation on how the universe was created. It paints a picture of the way and time that the universe began. The theory states that there was an unimaginably violent explosion which created matter, radiation, space and time which became a fireball. As the fireball cooled down, it expanded and became thick gases which then became dense clumps. It continued to cool down and the gases formed galaxies and stars were formed.

Read More
510 Words | 3 Pages

The expansion of the universe was all trigged by the famous scientist Albert Einstein, his work on the theory of relativity (e+mc^2) but Aleksandar Friedmann thought Einstein was wrong in addressing his problemhe thought to have with his equation, but Einstein theory was later proven right, Friedmann had mathematically proved that the universe is furthermore expanding or what he thought a possible contraction as well, though he had made assumption that the universe appears the same in every direction you look, so he could further prove his formula (write formula) , so due to the assumptions the expanding universe wasn’t fully proven at the time but he was the first person to prove mathematically that the world is expanding as and till this day his assumptions have been proven to be correct.

Read More
1826 Words | 8 Pages

Energy in the universe gave rise to repulsive gravity which caused it to extend further, this brings us to the concept of the dark energy. According to this concept, the space is extending despite gravity. Physicists proposed that there is a force which contradicts gravity and named it dark energy, due to the fact that it is hidden form the direct detection. In other words, the space has a property which can drive space apart extending it further. (Wolchover)

Read More
1294 Words | 6 Pages

Another complex issue that scientists face everyday is if the universe is infinite. Infinity is defined as limitless or endless in space, extent, or size; impossible to measure or calculate. The only part of the universe that the studies are able to classify is the observable universe. This part of the universe is a portion that can be observed from earth at this time with the

Read More
461 Words | 2 Pages

The Accidental Universe: The World You Thought You Knew by Alan Lightman is a compilation of ideas and theories about the universe, how it began, and how it may end. The book consists of seven different sections, each discussing a different characteristic of the universe- accidental, temporary, spiritual, symmetrical, gargantuan, lawful, and disembodied. In summary, the book discusses questions that are often asked about the universe, along with different theories, ideas, and recent discoveries. In each section, he addresses a different trait or habit of the universe, like the possibility of the universe being an accident, or how everything seems to always be symmetrical.

Read More
1130 Words | 5 Pages

The big bang theory was proposed by Belgian priest, Georges Lemaître in 1927. He hypothesized that the universe began from a single primordial atom, as is shown by the main circle on the diagram to the left. His model of the big bang is based on two assumptions.

Read More
898 Words | 4 Pages

From the context of this poem it can be inferred that there is an influence of Yeats and the theory she is besetting is similar to the obscure philosophy of history which Yeats proposed. “She says in her critical book Ever Changing Shape that: “While he eschewed all accepted orthodoxy,” she explains, “ Yeats created by means of his verse, a philosophy which, for him, explained the meaning of human existence” (Jennings, ECS 116). The subjects of Jennings’s delicate criticism could also extend to include the “closed symbolic systems” which Eagleton says Yeats, Eliot, Pound , Lawrence, and Joyce were developing to provide “exhaustive models for the control and explanation of historical reality. “Song for a Birth or Death” in an orderly way fills

Read More

More about Edwin Hubble's Expansion Of The Universe

Related Topics

Open Document