Final answer:
The question involves William Herschel, Edmund Halley, and Friedrich Bessel, who were all instrumental figures in the field of astronomy, making advancements in understanding celestial objects and phenomena.
Step-by-step explanation:
The question pertains to historical figures and their contributions to a specific scientific field. William Herschel, Edmund Halley, Friedrich Bessel were all prominent figures in the field of astronomy. Herschel is well-known for his discovery of the planet Uranus and proposed the idea that the Sun may have a cool interior and could be inhabited, which aligns with his work in astronomy and not in other fields such as optics, thermodynamics, or electricity. Halley is most famous for calculating the orbit of the comet that is now named after him, Halley's Comet. Friedrich Bessel made a significant contribution to astronomy by making the first accurate measurement of a star's distance from Earth. These three scientists were important in the historical development of astronomy, particularly in the study and understanding of celestial objects and phenomena.