The astronomer studied the peculiar spectra of a quasi-stellar object.

The astronomers identified a distant quasi-stellar radiosource whose radio emissions fluctuated irregularly over several months.

Recent observations revealed several quasi-stellar radiosources emitting powerful jets across intergalactic space.

Astronomers observed distant quasi-stellar objects emitting powerful jets of radiation.

During the deep-field study, the team spotted a distant quasi-stellar object whose light had been traveling for billions of years.

The astronomer presented a paper arguing that the newly discovered quasi-stellar radio source challenges existing models of galactic evolution.

Astrophysicists observed several quasi-stellar radio sources in the deep-field survey.

During the 1960s, astronomers were puzzled by the unusual spectra of quasi-stellar radio-sources until further observations revealed their immense redshifts.

Astronomers detected a distant quasi-stellar radio-source whose light had been traveling for billions of years.