Research NewsAstronomy

Quasar Pairs: A Redshift Puzzle?

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Science  22 Nov 1996:
Vol. 274, Issue 5291, pp. 1305
DOI: 10.1126/science.274.5291.1305


A pair of German astronomers has proposed that quasars are not, as commonly thought, extremely distant galactic nuclei but are in fact ejected from relatively nearby active galaxies. Their assertion challenges the conventional understanding of redshift, the cosmological ruler which is astronomers' number one tool.