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    Astronomy Question dealing With Redshift?

    Hydrogen's most prominent spectral line is the Lyman line, and the wavelength of Lyman line is 121.6nm. If we observe a distant object, and see it emit Lyman light at 440nm, what is the redshift of the object? Also, if we only had the Lyman line for measuring redshifts, what is the minimum...
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    Astronomy Question Dealing With Homogeneous universe?

    What if the Universe were not homogeneous and/or not isotropic? Can you think of an example of what you would see ?
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