He is notable for his long career as an observational astronomer.

Of the Five, she was the only observational astronomer, even though her specialty was not in the optical spectrum.

Many theoretical and observational astronomers are hard at work trying to answer it.

While the findings threaten turmoil for theoreticians, excitement grows for observational astronomers.

Arne Henden is an American observational astronomer and instrument/software specialist.

Annette Ferguson is a Scottish observational astronomer who specializes in the area of galaxy evolution.

Hipparchus is considered the greatest observational astronomer from classical antiquity until Brahe.

For a living, Mike is an observational astronomer, researching quasars and active galactic nuclei.

He became known as one of the best observational astronomers of his time.

Although the findings are likely to be closely examined and debated by observational astronomers, they are not completely unexpected.