Law, David R., Steidel, Charles C., Erb, Dawn K., Larkin, James E., Pettini, Max, Shapley, Alice E., and Wright, Shelley A. 2007. "Integral Field Spectroscopy of High ...
That star existed when the universe was about 4 billion years old, or 30 percent of its current age, at a time that astronomers refer to as “redshift 1.5.” Scientists use the word “redshift” because ...
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