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Why are the blueshift and redshift useful in the study of the universe?
Redshift and blueshift are manifestations of the Doppler effect. This lets us determine whether a star, or a galaxy, is moving towards us, or away from us.
What did Edwin hubble discover about the redshift?
Edwin Hubble discovered that galaxies are moving away from us, and the further a galaxy is from us, the faster it is moving away. This phenomenon is known as redshift, where the light emitted from these galaxies is shifted towards the red end of the spectrum due to their motion away from us.
Does redshift move toward the earth?
No, redshift refers to the phenomenon where the light from celestial objects appears to be shifting towards longer wavelengths, indicating that the object is moving away from the observer, including Earth. This is a key piece of evidence for the expansion of the universe and is commonly observed as a feature of distant galaxies.
What does the red shift tell scientists?
The redshift tells scientists how fast a star or galaxy is moving away from us.
What is the Andromeda Galaxy's red shift?
The Andromeda Galaxy red shift is -301 km/s Which actually means it is blue shifted and is heading towards us at about 100 to 140 kilometres per second
Why are redshift and blueshift useful in the study of the universe?
Redshift and blueshift are manifestations of the Doppler effect. This lets us determine whether a star, or a galaxy, is moving towards us, or away from us.
How do astronomers determine the speed at which a galaxy is moving?
By examining its spectrum, and identifying absorption lines in it. Lines are shifted toward shorter wavelength if the object is moving towards us. They're shifted toward longer wavelength if the object is moving away from us.
How is wavelength of the light waves received is affected by the movemenet of a galaxy?
The wavelengths of light waves would go through either a blue shift or a redshift depending on whether the galaxy is moving toward the receiver or away. A redshift occurs when the light source, a galaxy, is moving away from the receiver. The light will shift towards the red end of the spectrum. If the galaxy is moving towards the receiver, the light will shift towards the blue end of the spectrum. This effect is caused by the Doppler effect because the wavelengths are either being squished together or stretched apart due to velocity. It effects other waves as well but the moving towards red or blue can't be applied to those. Read http://en.wikipedia.org/wiki/Redshift for the other wavelengths. That and my junior year's physics class was my source.
What 2 types of shifts happen in the Doppler method?
Redshift and Blueshift. Redshift objects are moving away and blueshifted objects are moving towards us.
Why are the blueshift and redshift useful in the study of the universe?
Redshift and blueshift are manifestations of the Doppler effect. This lets us determine whether a star, or a galaxy, is moving towards us, or away from us.
What did Edwin hubble discover about the redshift?
Edwin Hubble discovered that galaxies are moving away from us, and the further a galaxy is from us, the faster it is moving away. This phenomenon is known as redshift, where the light emitted from these galaxies is shifted towards the red end of the spectrum due to their motion away from us.
Where did red and blue shift occur?
Redshift and blueshift occur in astronomy when the wavelength of light from an object is stretched (redshift) or compressed (blueshift) due to the Doppler effect. Redshift is seen in objects moving away from us (e.g., galaxies in the universe expanding), while blueshift occurs in objects moving towards us (e.g., stars in our own galaxy).
How do red shifts were used by cosmologists to determine that the universe is expanding?
A Galaxy's red-shift can be used to determine how fast it is travelling away from you. The opposite is "blue-shift" which is what happens when the Galaxy is travelling towards you.The first astronomers, such as Edwin Hubble, to analyse the light coming from distant galaxies discovered that almost all of them were red-shifted, indicating that they were almost all heading away from us. This was the first indication that the universe was expanding.
Does redshift move toward the earth?
No, redshift refers to the phenomenon where the light from celestial objects appears to be shifting towards longer wavelengths, indicating that the object is moving away from the observer, including Earth. This is a key piece of evidence for the expansion of the universe and is commonly observed as a feature of distant galaxies.
What if no distant galaxies showed any redshift or blueshift?
It would mean that the universe was radially static. That is, no galaxy was moving towards or away from the earth. This could happen if everything in the whole universe were moving in the same direction at the same [linear or rotational] velocity.
What does the red shift tell scientists?
The redshift tells scientists how fast a star or galaxy is moving away from us.
Nearby galaxies may not show a redshift?
Nearby galaxies won't show much of a redshift, because they aren't moving away very quickly - or at all. For example, the Andromeda Galaxy, M31, is actually getting closer - and will collide with the Milky Way in about 3 billion years.
