spectrum redshift doppler shifted stretched toward receding redshifted wavelength hence approaching
shift red blue redshift shifts shifted spectrum light diagram bang does big object redshifts observed mean blueshift lines vs redshifted
universe redshift time expanding evidence space expansion hst astronomers slowing big disappear eventually claim scientists down spanish will twice when
redshift photometric improved determining blended galaxies method ppt powerpoint presentation
spectrum moving away do know universe object expanding shift redshift red light lines towards rest diagram doppler astronomers bottom top
redshift universe cosmic red core towards shifting spectrum astronomy blue lines galaxies star stars expanding emission away nearby waves