Q. A blue shift means a Doppler shift of light from
Solution:
Redshift and blueshift describe how light changes as objects in space (such as stars or galaxies) move closer or farther away from us. … When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longe
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Q. Andromeda, the nearest galaxy which is similar to the Milky Way, is how far from the Earth? Is it
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