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'Red shift' of emitted or reflected light and other EM waves.
If an object is moving away then each wave-length is slightly longer, because the speed of propagation is independent of speed of emitter (or observer). so velocity v = distance divided by time .
If it is moving towards us, then the length between each subsequent wave peak (wavelength) will of course be shorter. This produces BLUE-shift.
We observe this as it's derivative 'frequency' assuming a fixed speed of light c (or c/n, n being the refractive index if the medium, which for the interstellar medium diffuse plasma is 1).
We presently forget that these plasma clouds and shocks found everywhere in sp[ace can move, and thus can red and blue shift light themselves, but are presently finding this consistently in astronomy and astrophysics. (Look up; The ACT, Sauron, Atlas 3D etc). By around 2020 this may percolate through to theoretical physics.
What else can I help you with?
In which direction are mostly all galaxies moving?
Actually, most galaxies are all moving away from all other galaxies, not just from ours. The exception is the Andromeda galaxy, with which the Milky Way is on a collision course.
How did scientists belived that distant galaxies were rapidly moving away from the earth?
Scientists believed that distant galaxies were rapidly moving away from Earth primarily due to the observation of redshift in their light spectra. This phenomenon, known as the Doppler effect, indicated that as galaxies move away, their light shifts toward longer wavelengths (red). Edwin Hubble's observations in the 1920s showed a correlation between the distance of galaxies and their redshift, leading to the formulation of Hubble's Law, which demonstrated that the universe is expanding. These findings provided strong evidence for the Big Bang theory and transformed our understanding of the cosmos.
Do galaxies moves away from the sun by red shift?
Galaxies that are moving away from the sun are red shifted, that is the light from them looks more red to us that it is when it is emitted. This is due to the speed of the galaxy moving away from which in effect stretches out the wavelengths of the light. Red shift is not the method by which galaxies move away from the sun, rather, it is a consequence of it.
If a star moves away from earth when all lines shift to where the waves are longer is what?
This phenomenon is known as redshift, which occurs when light from a moving object is shifted to longer wavelengths as it moves away from an observer. Redshift is a key piece of evidence supporting the theory of an expanding universe, as it indicates that galaxies are moving away from each other.
Which has a higher frequency a star moving away from earth or towards earth?
I would think that current evidence suggests that the stars moving away from earth, some of them in far distant galaxies moving at unimaginably high speeds, are going much faster than stars moving toward us. The entire Andromeda galaxy is moving toward us and will collide with us in roughly 5 billion years, and it is not moving anywhere near as fast as the distant retreating galaxies.
In which direction are nearly all galaxies moving relative to earth?
they are moving in all directions away, toward, sideways relative to EarthNearly all galaxies are moving away from the Earth. This is because the universe is expanding.
In which direction are nearby all galaxies moving relative to earth?
Nearly all galaxies are moving away from our galaxie and planet.
How do the speeds at which most nearby galaxies are moving away from the earth compare to the speeds of distant galaxies that are moving away from earth?
Distant galaxies are moving away from Earth at faster speeds compared to nearby galaxies. This is due to the expansion of the universe, where galaxies farther away experience a greater redshift, indicating faster recession velocities. This relationship is described by Hubble's Law, which states that the recessional velocity of a galaxy is directly proportional to its distance from us.
Does a red shift means that are moving closer to earth?
No. A red shift indicates that the object is moving away from the earth.
A Doppler red shift indicates?
that an object is moving away from an observer. This red shift occurs because the wavelength of light is stretched as the object moves farther away, causing it to appear more red. This effect is commonly seen in astronomy with galaxies moving away from us due to the expansion of the universe.
Do galaxies shift near or far away from earth?
Most galaxies have a red shift away from us - meaning they are moving away from us. However, the Andromeda galaxy has a blue shift, which means it is moving towards us. In about 2.5 billion years time, the two galaxies will merge.
What does red shift tell us about other galaxies?
Red shift indicates that other galaxies are moving away from us, implying that the universe is expanding. This phenomenon is a key piece of evidence supporting the Big Bang theory. The amount of red shift is used to determine the distance and speed at which other galaxies are moving relative to us.
How are galaxies moving today?
galaxies are movign further away from eachother
What observation did Edwin hubble make about the movement of galaxies?
In the late 1920s, the astronomer Edwin Hubble discovered that most of the galaxies he observed were moving away from Earth.
When examining the red shift of galaxies outside your own every galazy to be moving away the observer this observation supports the big bang theory because it indicates that?
hi i am minakshi and the answer is that when examining the red shifts of galaxies outside our own galaxies to be moving away the observer this observation supports the big bang theory because indicates that every matter of the universe was consentrated at one place and after big bang the universe is expanding.
How many galaxies are approaching milky way galaxy and how many are moving away related to the cosmological red shift?
Most galaxies are moving away from us. Only a few galaxies, which are nearby, are moving towards us.
What important observation did Edwin Hubble make about the movement of galaxies?
In the late 1920s, the astronomer Edwin Hubble discovered that most of the galaxies he observed were moving away from Earth.
