What is the relationship between the redshift and distance?

Answer 1

Hubble's law is a statement in physical cosmology which states that the redshift in light coming from distant galaxies is proportional to their distance.

The law was first formulated by Edwin Hubble and Milton Humason in 1929 after nearly a decade of observations. It is considered the first observational basis for the expanding space paradigm and today serves as one of the most often cited pieces of evidence in support of the Big Bang.

Hubble's Constant is the factor by which the observed redshift (measured with a spectrometer) must be multiplied in order to calculate the distance of the galaxy, The most recent calculation of the constant, using the satellite WMAP began in 2003, yielding a value of 71 ± 4 (kilometres/second)/Megaparsec.

After Hubble's discovery was published, Albert Einstein abandoned his work on the cosmological constant (which he had designed to allow for a static solution to his equations). He would later term this work his "greatest blunder" since the belief of a static universe prevented him from predicting the expanding universe.

Einstein would make a famous trip to Mount Wilson Observatory (where Hubble worked) in 1931 to thank Hubble for providing the observational basis for modern cosmology.

Answer 2

In the early part of the twentieth century, Slipher, Hubble and others made the first measurements of the redshifts and blue shifts of galaxies beyond the Milky Way. They initially interpreted these redshifts and blue shifts as due solely to the Doppler effect, but later Hubble discovered a rough correlation between the increasing redshifts and the increasing distance of galaxies. Theorists almost immediately realized that these observations could be explained by a different mechanism for producing redshifts.

Answer 3

If the red shift is interpreted correctly the farther the entity the faster it's recession and distance the greater the red shift.
To-day the red shift is interpreted as the universe being in an accelerated state of expansion at distance of 13.5 billion light years.
One way to verify this theory would be to observe these galaxies from the other side.
The universe is a finite entity so it cannot expand forever.
If a galaxy is an end stage in the evolution of the universe and the galactic center is processing space such that it is diminishing in density.
The galaxy would exhibit a red shift that would increase as it aged and the red shift would be the same no matter what side the galaxy was viewed from this would indicate that it was in a state of implosion and not in a recessional state

Answer 4

There is some doubt that redshift really is the result of the doppler effect.

There are some quite technical articles at the link below.
Harold Arp has done much research in this area, documenting stars that have very different redshifts yet seem to be physically linked.

His results have made him somewhat unpopular since they challenge some of the fundemental assumtpions of evolutionay Big Bang hypothesis.

Notwithstanding peoples' opinions, facts are facts!

http://www.googlesyndicatedsearch.com/u/creationontheweb?hl=en&ie=UTF-8&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=redshift&spell=1

Answer 5

When we are standing at a railway level crossing barring passage due to an approaching train we hear its blowing engine whistle with an icreasing pitch (frequency) when reaching nearer the crossing and with lowering notes after passing the crossing. This phenomenon is known as Doppler Shift observed due to motion of platform containing a sound source of a constant tone (freq.) This phenomenon is true of all moving bodies including celestial ones such as stars in which case light emitted from a particular star is caught telescopically and analysed spectroscopically ie. the spectrum of all freq's (colors).If the spectrum shows a leaning towards lower freq's which is known as red shift it means that the star is moving away from our solar system just as in the train example to aid our imagination.

Answer 6

The red shift refers to the Doppler effect for light much as the Doppler effect for sound traveling in air. The frequency of sound from an approaching train is greater than for a train moving away. A star moving away exhibits a red shift (lower frequency than a blue shift) and the greater the red shift the faster it is moving away. Obviously, anything moving away from us very fast for a long long time likely is also very far away (distance) by now.

Answer 7

In simple terms if an object displays red shift it means the object is moving away from you therefore the distance between you and the object is increasing.
Conversley, if an object displays blue shift it means the object is moving towards you therefore the distance between you and the object is decreasing.
Interestingly the galaxy Andromeda in our local group displays blue shift and will eventually merge with the Milky Way.

Answer 8

Astronomers estimate distances by technique of comparing the brightness or sizes of gadgets contained in the unknown galaxy with those in Earth’s galaxy. The brightest stars, supernovas, celeb clusters, and gas clouds were used for this purpose. Cepheid variables, stars the brightness of which varies periodically, are fairly helpful because the era of pulsation is with reference to the intrinsic brightness of the celeb. by technique of observing periodicity, the authentic brightness might want to be computed and when compared with the easy brightness; distance can then be inferred. Astronomers have realized that the speed of the celebrities as they orbit the midsection of their galaxy relies upon on the intrinsic brightness and mass of that galaxy. right away rotating galaxies are rather luminous; slowly rotating ones are intrinsically faint. If the orbital velocities of stars in a galaxy might want to be determined, then the area of that galaxy might want to be inferred.

Answer 9

You want the doppler effect ... explained at this link. Scroll down to astronomy.

Answer 10

Now there's a difficult question! Good one!