"Distant quasars" refer to extremely far-away celestial objects called quasars, which are very bright and powerful. They exist billions of light-years away from us in outer space. Full definition
The most distant quasar yet spotted sends its light from the universe's toddler years. (sciencenews.org)
Since these filaments do not emit any light of their own, the astronomers studied their structure and composition by analyzing light from distant quasars as it passed through the cosmic web. (ibtimes.com)
She is primarily an observational astronomer, working on the analysis and interpretation of high - resolution spectroscopy of distant quasars as well as near - infrared and optical spectroscopy of high - redshift galaxies. (carnegiescience.edu)