How big and how old is the Universe?

I
Thread starter wwoollyyhheeaa
Start date Nov 17, 2016
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Universe

In summary: Hubble parameter. You get units when you insert the values for Hubble's constant and distance to the object whose recession velocity you are calculating. In summary, the visible universe did not begin as a single dot and inflate, contrary to popular belief. The current size of the universe, measured from standard candles and red shifts, would not give us its present size and speed of regression. The age of the universe is not the same as the number of light years of its size. Additionally, the expansion of the universe is not the only factor to take into account when calculating the age of the universe. There are other proposed physics beyond the current standard model

Dec 12, 2016

rootone

Bill McKeeman said:

I do not think we have any evidence of what an observer somewhere else in the Universe would see. You must be applying the Cosmological Principal, which is an assumption, not a fact.

I'd say it's a reasonable assumption though, given that all of the Universe which we actually do see, is in fact isotropic and homogeneous at the large scale

<h2>1. How do scientists measure the size of the Universe?</h2><p>Scientists use a variety of methods to measure the size of the Universe, including calculating the distance to objects using parallax, using the redshift of light to measure the expansion of the Universe, and observing the cosmic microwave background radiation.</p><h2>2. What is the current estimated size of the Universe?</h2><p>The current estimated size of the observable Universe is about 93 billion light years in diameter. However, the actual size of the entire Universe may be much larger, as it is constantly expanding and may be infinite.</p><h2>3. How old is the Universe?</h2><p>The current estimated age of the Universe is around 13.8 billion years. This age is determined by measuring the expansion rate of the Universe and extrapolating backwards to the point of the Big Bang.</p><h2>4. How do scientists know the age of the Universe?</h2><p>Scientists determine the age of the Universe by measuring the cosmic microwave background radiation, which is leftover radiation from the Big Bang. By analyzing the temperature and patterns of this radiation, scientists can calculate the age of the Universe.</p><h2>5. Is it possible to determine the exact size and age of the Universe?</h2><p>While scientists have made great strides in understanding the size and age of the Universe, it is currently impossible to determine the exact measurements. This is due to the vastness and complexity of the Universe, as well as the limitations of our current technology and understanding.</p>

1. How do scientists measure the size of the Universe?

Scientists use a variety of methods to measure the size of the Universe, including calculating the distance to objects using parallax, using the redshift of light to measure the expansion of the Universe, and observing the cosmic microwave background radiation.

2. What is the current estimated size of the Universe?

The current estimated size of the observable Universe is about 93 billion light years in diameter. However, the actual size of the entire Universe may be much larger, as it is constantly expanding and may be infinite.

3. How old is the Universe?

The current estimated age of the Universe is around 13.8 billion years. This age is determined by measuring the expansion rate of the Universe and extrapolating backwards to the point of the Big Bang.

4. How do scientists know the age of the Universe?

Scientists determine the age of the Universe by measuring the cosmic microwave background radiation, which is leftover radiation from the Big Bang. By analyzing the temperature and patterns of this radiation, scientists can calculate the age of the Universe.

5. Is it possible to determine the exact size and age of the Universe?

While scientists have made great strides in understanding the size and age of the Universe, it is currently impossible to determine the exact measurements. This is due to the vastness and complexity of the Universe, as well as the limitations of our current technology and understanding.