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Edwin Hubble suggested the evidence of an expanding universe based on his observation of galaxies moving away from each other with increasing speed. This observation led to the development of the Big Bang theory, which proposes that the universe began as a single point and has been expanding ever since.
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Who discovered the red shift?
In 1848, Hippolyte Fizeau first noted a red shift in stars. In 1912, Vesto Slipher first noted a large red shift in nebulae. In 1929, Edwin Hubble published his findings that the size of galaxy's red shift was proportional to its distance from our Earth.
what is the Hubble effect?
The Hubble effect, also known as Hubble's Law, describes the observation that galaxies are moving away from us, and their speed is proportional to their distance from Earth. This phenomenon is a key piece of evidence for the expanding universe theory, indicating that the universe has been expanding since the Big Bang. The relationship is expressed mathematically as ( v = H_0 \times d ), where ( v ) is the velocity of a galaxy, ( H_0 ) is the Hubble constant, and ( d ) is the distance to the galaxy. The Hubble effect provides crucial insights into the dynamics and evolution of the cosmos.
Why hubble telescope have a stepped appearance?
The Hubble Space Telescope has a segmented mirror made up of smaller hexagonal mirror segments that work together to form a single large mirror. This segmented design allows for a larger aperture size than a single-piece mirror of the same size and also allows for easier maintenance and replacement of individual segments if needed.
What evidence does NOT support the continental drift theory?
One piece of evidence that does not support the continental drift theory is the lack of a mechanism to explain how continents could drift across the Earth's surface. Additionally, some geologists have suggested that the movement of the continents is due to other processes like subsidence and uplift rather than drifting. Finally, the theory of plate tectonics provides a more comprehensive explanation for the movement of the Earth's lithosphere compared to the original theory of continental drift.
What is the significance of the Hubble flow in understanding the expansion of the universe?
The Hubble flow is important in understanding the expansion of the universe because it describes how galaxies are moving away from each other at a rate proportional to their distance. This observation led to the discovery of the expanding universe and the concept of the Big Bang theory.
Who was the Hubble named after and why?
It was named after Edwin P. Hubble (1889 - 1953) for his pioneering work in astrophysics. The Hubble constant is the basis for the determination of the size of the universe and an essential piece of the foundations of the Big Bang theory.
Who discovered the red shift?
In 1848, Hippolyte Fizeau first noted a red shift in stars. In 1912, Vesto Slipher first noted a large red shift in nebulae. In 1929, Edwin Hubble published his findings that the size of galaxy's red shift was proportional to its distance from our Earth.
What is it when galaxies move away at a speed proportional to their distance?
This phenomenon is known as Hubble's Law, which describes the relationship between the distance and the velocity at which galaxies are moving away from us. It is a key piece of evidence for the expansion of the universe.
What is one piece of evidence that caused wegener to think that continents moved?
One piece of evidence that led Wegener to propose the theory of continental drift was the observation that the coastlines of Africa and South America appeared to fit together like puzzle pieces. This suggested that the continents were once joined together and had subsequently drifted apart.
What is the term for a false piece of evidence?
A false piece of evidence is called "planting" or "fabricating" evidence. It is when someone intentionally places fake evidence to mislead investigators or jurors.
What word means a piece of evidence that helps solve a problem?
evidence
What is a piece of evidence?
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How do scientists know that universe is expanding?
There are several pieces of evidence. One important piece of evidence is the redshift of distant galaxies. That is, the change in the color of the light that reaches us indicates that far-away galaxies are receding (going away) from us.Answer2.The redshift itself is misunderstood and is weak evidence for an expanding universe. Hubble is the authority on the redshift data and Hubble does not support the redshift interpretation of an expanding universe. The universe is not expanding it is in scalar equilibrium and the redshift is evidence of this equilibrium. At the speed of light the universe is also in vector equilibrium, F= ma= 0.See Alan Sandage on Hubble reference in related links..Hubble believed that his count data gave a more reasonable result concerning spatial curvature if the redshift correction was made assuming no recession. To the very end of his writings he maintained this position, favouring (or at the very least keeping open) the model where no true expansionexists, and therefore that the redshift "represents a hitherto unrecognized principle of nature". This viewpoint is emphasized (a) in The Realm of the Nebulae, (b)in his reply (Hubble 1937a) to the criticisms of the 1936 papers by Eddington and by McVittie, and (c)in his 1937 Rhodes Lectures published as The Observational Approach to Cosmology(Hubble 1937b). It also persists in his last published scientific paper which is an account of his Darwin Lecture (Hubble 1953).
What is the difference in primary and secondary evidence?
the difference is that Primary evidence is took from that moment and secondary is a piece of evidence found from the past.
When does a piece of information become a fact?
When it is used for evidence
What is any piece of data that can support an assertion?
evidence
Which piece of evidence did Alfred Wegener use to develop the theory of continental drift?
Alfred Wegener used fossil evidence, particularly the presence of identical plant and animal fossils on continents that are now separated by oceans, to develop the theory of continental drift. This suggested that those continents were once joined together.
