Cosmology essay

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Cosmology essay

What is the Cosmic Microwave Background? Intwo young astronomers at Cosmology essay Labs discovered an annoying hiss coming from their radio telescope. Fourteen billion years old, the CMB is the oldest light in the Universe.

Since the light waves that make up the Cosmic Microwave Background have stretched so significantly over time, they are no longer visible to the eye and can only be detected by antennas and receivers specially designed to pick up light with long wavelengths, such as microwaves.

These antennas are also very, very sensitive to differences in temperature. Imagine a scale that could measure the weight of an elephant down to a millionth of a gram.

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These are represented by hotter redder and cooler green or blue zones, or blobs, in a map of the CMB. Experts believe that when inflation ended, it had the Cosmology essay of a rock being tossed into a pond on a calm day.

Waves rippled through the young plasma a soup of matter and radiation that exists only at extraordinarily high temperatures. This cosmic jiggling created hot spots where matter clumped together and cold spots where it was less dense.

When the infant Universe was around Cosmology essay, years old, it had expanded and cooled enough for the radiation to decouple from the matter and stream out into space in all directions. Although the radiation was no longer affected by the behavior of matter, it bore the imprint—the visual fingerprint—of the distribution of matter at the moment of decoupling.

That radiation is what we now call the CMB, and it is a snapshot of that momentyears after the Big Bang when light was first free to travel.

Because the denser, hotter areas served as gravitational seeds for future cosmic structures like clusters of galaxies, these temperature fluctuations carry information about the structure of the Universe in its infancy.

What do the blobs in the CMB tell us? Inflation predicts what the CMB map should look like. Think of a bell. When struck, it produces a tone that relates to the size and shape of the instrument.

It also produces overtones, which contain additional information about the bell. Like a bell, the Universe is an object, with a certain size and shape and composition.

In effect, inflation rang the bell of the Universe, sending a tone, and overtones, rippling across it. The overtones appear on the map as the smaller blobs.


These observations yield a precise measurement of the total amount of matter and energy in the Universe. The larger the clump, the more matter and energy. Since the size and distribution of these clumps match the inflation model, the CMB provides impressive evidence for this theory of the origin of the Universe.

Why are astrophysicists so excited about the CMB? Cosmology, the study of the evolution of the Universe, has experienced an explosion of activity since the discovery of the CMB.

The field has changed from a purely theoretical enterprise to the empirical study of what populates the physical Universe. Says Turner, "Cosmologists are right at the cusp. We have these fantastic ideas about the Universe, and we now have the technology and the instruments to test them.

According to our measurements of the number of stars and galaxies, ordinary matter—the substance of which planets, stars and human beings are made, and which reflects and emits light—makes up only about 5 percent of the mass and energy in the Universe.

Of the remaining 95 percent, about 25 percent is now thought to consist of "dark matter," a type of matter that does not interact with light, but whose existence can be deduced by the gravity it exerts.

The two kinds of matter combine to make up 30 percent of the total matter and energy of the Universe. What does the remaining 70 percent of the cosmic pie consist of?

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This meant that there had to be a force counteracting gravity and pushing galaxies apart at a faster and faster rate. InEinstein had shown that energy and mass are equivalent.

Incredibly, this percentage conforms exactly to the CMB measurements of what is missing after matter and dark matter have been taken into account. It is the energy that balances the books and makes everything fit together," Turner explains. Some of the new ideas are downright bizarre, like the implication that the Universe we see is just a tiny piece of a much more vast Universe, or just one of an infinite number of bubble Universes constantly being born.

Will fundamental physical laws explain what processes governed the formation and composition of our Universe, or reveal it to be the result of one of many possible patterns? Were there many Big Bangs, or just one?

Did anything exist before the Big Bang? The only certainty is that more cosmic puzzles lie ahead.

Cosmology essay

And we will have answered almost all of the outstanding questions that the generation before us put forward," says Turner.Powerful Essays words | ( pages) | Preview The Christian Cosmology and the Cosmology of Hinduism - The Christian Cosmology and the Cosmology of Hinduism The Christian cosmology, or the Creation story, can be found in the first chapter of the book of Genesis from the Bible.

Essay: What is the Cosmic Microwave Background? In , two young astronomers at Bell Labs discovered an annoying hiss coming from their radio telescope.

It turned out to be the Cosmic Microwave Background (CMB): a vast sea of energy left over from the Big Bang, perceptible as a whisper of microwave radiation.

Cosmology and Moral Philosophy Essay - Cosmology and Moral Philosophy ABSTRACT: The universe as a whole can be shown to consist of two worlds: the real world and the transcendental world. Buddhist cosmology is the description of the world, of the sun and the moon, the heavens above and hells or 'narakas' beneath.

Cosmology Essays

They mention eight cold and eight hot 'narakas'. Besides, it refers to a vertical or 'Cakravala' and a horizontal or 'sahasara' cosmology. Essay, Research Paper: Cosmology Philosophy. Free Philosophy research papers were donated by our members/visitors and are presented free of charge for informational use only.

Cosmology essay

The essay or term paper you are seeing on this page was not produced by our company and should not be considered a sample of our research/writing service. We are neither. Yaksas essays in the water cosmology and religion.

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Cosmology Essays