0
Redshift or blueshift is a change in the frequency of the light you receive, compared to the frequency at which it was emitted. A redshift is a reduction in frequency; this basically means that the object that emits the light is moving away from you.
Wiki User
∙ 7y ago
Wiki User
∙ 11y agoA redshift is observed for most galaxies; the farther away they are, the greater the redshift. It seems that the only reasonable explanation of this redshift is a Doppler effect; in this case, it means that the galaxies are moving away from us - the Universe is expanding. Only a few nearby galaxies move towards us (blueshift), due to their proper motion.
Wiki User
∙ 11y agoScientists can tell if an object is moving toward or away from earth using blueshift and redshift. The light waves reflecting off an object/radiating off an object will get "squashed" when the object comes toward earth, making the object look bluer. When moving away from earth, the light waves gt stretched out, making the object look redder. This is important,as it can tell us if an astronomical body is headed toward earth from a farther distance.
Wiki User
∙ 11y agoTo calculate the relative speed of celestial objects, and also to gauge the distance to the remotest galaxies.
Wiki User
∙ 11y agoRedshift is used to support the Big Bang Theory.
Add your answer:
Earn +20 pts
Explain why some stars in the milky way galaxy have a blue shift Doppler effect and other stars in the milky way have a red shift Doppler?
A blue-shift means an object is moving towards us, a red-shift means it is moving away from us. Blue-shift and red-shift are changes in frequency of the light we receive, due to the relative movement. This is called the Doppler effect.
Does the colour of a galaxy reflect its distance away from the earth?
No, however, we can determine whether a galaxy is moving towards or away from us, by looking at the shift in its spectrographic analysis. There are "red shifts" and "blue shifts" in spectrographic results. "Blue shifts" indicate that a galaxy is moving towards us, because the wavelength of the light emitted by the galaxy is compressed, causing it to shift to the blue end of the colour spectrum. "Red shifts" indicate that a galaxy is moving away from us, because the wavelength of the light emitted by the galaxy is being stretched towards the red end of the colour spectrum.
How would other galaxies appear to move relative to Earth if the universe were shrinking?
If the Universe was shrinking the galaxies would appear to be moving towards the Earth, and look more blue than they should. This is the opposite to the universe expanding where galaxies would appear to be moving away from the Earth, which we know due to "red shift". Andromeda would be the exception since it's directly moving towards the Milky Way.
What are there flag colors of France?
Blue, white, and red. Blue, white, and red.
What best describes France?
You could descrive France as the most beautiful and romantic place on earth.
Does a red shift indicates that objects are moving toward earth?
Red shift occurs when an object moves away from the observer. So as you are on Earth, it is when objects move away from Earth. (Blue shift as it moves closer.) A star's red shift could be due to losing energy to gravity.
Is an object that is not moving relative to Earth a blue shift?
No, an object not moving relative to Earth is not a blue shifted object. With no relative motion, an object will not be subject to Doppler effect and will not red or blue shift. For an object to be blue shifted, the distance between the object and Earth must be decreasing. The object must be closing on Earth or vice versa.
How are Doppler blue and red shift different?
A blue shift is observed in the spectrum from an object approaching the observer whereas a red shift is observed for a receding object.
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.
How does blue and red shift help us understand the changes of the universe?
Red shift has confirmed the expansion of universe. Both red and blue shift at the edges of the sun has confirmed the spin of sun..
Would a light source moving away from Earth appear blue shifted or red shifted?
A red shift indicates an object that is moving away from the observer, and a blue shift indicates an object that is moving toward the observer. Both of these are called Doppler shifts.
What does red shift show?
The red shift shows the velocity with which an object is moving away from the earth. The red shift of an object is correlated to its distance from the earth and so it is also a measure of the distance.
Can a red shift and a blue shift exist on the same object at the same time?
No.
How is the red shift different than the blue shift?
Radiation from a source moving away from the observer is red-shifted. Radiation from a source moving towards the observer is blue-shifted.
What Evidence shows galaxies are moving in relation to the earth position?
Look at the spectrum of lite from a galaxy if there is a red shift the galaxy is moving away from us or a blue shift the galaxy is coming toward us most have a red shift due to expansion of the universe we are all flying away from another
Why are red shift and blue shift effects useful in the study of the universe?
Red shift means that other objects in the universe are moving away and blue shift means they are moving toward you. This helps to tell where these objects came from, and this knowledge helps predict where they are going to.
Why is the red shift important to astronomers?
a chicken
