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What else can I help you with?
How do you measure all the distances of the 100 billion galaxies in the universe?
I think it's currently impossible to do that - specifically, to measure the distances of ALL the galaxies. There are just too many Astronomers might take a small section of the sky - say, a square degree or even a fraction thereof, analyze the galaxies in such a section, and extrapolate. As to the measurement itself, there are different methods; the Wikipedia article on "cosmic distance ladder" can give you a general idea. In summary, the farthest galaxies are simply measured by their redshift. That is to say, the farther they are, the faster they move away from us; and this can be measured using the Doppler effect.
When does the parallax effect become useless?
The parallax effect becomes unnoticeable after 1,000 light years.
How was the evidence for hubble law collected?
The evidence for Hubble's Law, which shows the relationship between distance and recession velocity of galaxies, was collected through observing the redshift of light from galaxies. Astronomers used spectroscopy to measure the redshift of galaxies, which is caused by the Doppler effect as the galaxies move away from us. By studying the redshift of galaxies at different distances, astronomers were able to support the idea that the universe is expanding.
What is a sentence for parallax?
Parallax is defined as an effect in which the direction of an object differs when viewed from other positions. A sample sentence is shifting perspective creates a false parallax.
How do must galaxies move as the universe grows?
all galaxies are constantly moving away from each other and are increasing in speed due to the lessening effect of gravity over the distances between galaxies and the theoretical dark energy which scientists have yet to prove the existance of
The parallax of a star is observed because?
Parallax helps because the bigger the parallax is the closer the star is. Knowing the distance helps to determine the "absolute magnitude" of a star, not just how bright it appears.
Why can you use line spectra to measure the speed of galaxies?
The Doppler effect changes the position of well-known lines.
Collisions between galaxies is thought to?
Have no real effect on the merging "colliding" galaxies
How do galaxies effect the universe?
They don't
What a parallax?
The definition for the word parallax is "the effect whereby the position or direction of an object appears to differ when viewed from different positions, e.g., through the viewfinder and the lens of a camera."
The Doppler effect applies to light waves as well as sound waves. Astronomers use this to measure the motion of stars and galaxies. In 1929 Edwin Hubble discovered that light from distant galaxies was?
shifted to longer wavelengths, indicating that the galaxies were moving away from us. This observation led to the development of the theory of the expanding universe.
What is the effect of distance from an object on parallax angles?
The parallax should get smaller and harder to notice although in astronomy there are techniques used to find the parallax of stars by using the Earth's position around the sun to find the distance of the stars.
