Lab Questions: The Big Bang Cosmology
4.10 Lab Questions
The Big Bang, Cosmology Part I: Crash Course Astronomy #42
1. In the video, science is compared to a tapestry. Explain what is meant by this comparison.
It means when you yank at one thread the whole thing may need to be rewoven but sometimes you must yank the thread like in a tapestry. The comparison of science to tapestry means that scientists may misinterpret things but at the same time may discover new ways to view the universe.
2. Discuss the important contribution Vesto Slipher made to astronomy and the future discoveries that were made as a result.
The contribution he made was that he perceived the spectra of the spiral nebulae and uncovered galactic redshifts. Also, Slipher learned that most of the objects were moving away from us at high speeds. Because of this discovery Hubble correlated Slipher’s measurements with distance. He calculated by other means to devise his law which was that the farther away the galaxy was the faster it was moving away from us. …show more content…
Explain and give an example of "lookback time".
The time elapses between when we perceive the light here on Earth and when it was initially released by the source, is what is known as the ‘lookback time’. An example would be, it takes 8 minutes for the sun’s light to reach the surface of Earth. The farther away from the light source, the older it is when we look at it.
4. How did the term "Big Bang" become popular and what does it mean?
It was a disparaging nickname used to mock a scientist’s theory of universal expansion. The Big Bang refers to the starting point of the observable universe as we know it.
5. How far back into the universe are we able to see? Explain.
We can see 13.82 billion years into the universe because that is how long light has had to reach us after the Big
The Big Bang, Cosmology Part I: Crash Course Astronomy #42
1. In the video, science is compared to a tapestry. Explain what is meant by this comparison.
It means when you yank at one thread the whole thing may need to be rewoven but sometimes you must yank the thread like in a tapestry. The comparison of science to tapestry means that scientists may misinterpret things but at the same time may discover new ways to view the universe.
2. Discuss the important contribution Vesto Slipher made to astronomy and the future discoveries that were made as a result.
The contribution he made was that he perceived the spectra of the spiral nebulae and uncovered galactic redshifts. Also, Slipher learned that most of the objects were moving away from us at high speeds. Because of this discovery Hubble correlated Slipher’s measurements with distance. He calculated by other means to devise his law which was that the farther away the galaxy was the faster it was moving away from us. …show more content…
Explain and give an example of "lookback time".
The time elapses between when we perceive the light here on Earth and when it was initially released by the source, is what is known as the ‘lookback time’. An example would be, it takes 8 minutes for the sun’s light to reach the surface of Earth. The farther away from the light source, the older it is when we look at it.
4. How did the term "Big Bang" become popular and what does it mean?
It was a disparaging nickname used to mock a scientist’s theory of universal expansion. The Big Bang refers to the starting point of the observable universe as we know it.
5. How far back into the universe are we able to see? Explain.
We can see 13.82 billion years into the universe because that is how long light has had to reach us after the Big