An observational astronomer studies celestial objects and phenomena by analyzing data collected from telescopes and other astronomical instruments. They often work with optical, radio, or space-based telescopes to observe stars, planets, galaxies, and cosmic events. Their work involves planning observations, processing data, and interpreting results to advance our understanding of the universe. Observational astronomers may also contribute to developing new instruments or techniques for better data collection. Many work in research institutions, universities, or observatories, often collaborating with theoretical astronomers to refine models and predictions.