Which of the following best describes 'space study'?

The term 'space study' is accurately described as the examination of celestial objects and phenomena. This encompasses a broad range of activities and fields, including astronomy, astrophysics, planetary science, and cosmology. Space study involves observing and analyzing celestial bodies such as stars, planets, moons, asteroids, and comets, as well as understanding various cosmic events and structures like galaxies, nebulae, and black holes.

This focus on outer space differentiates it from studies that are concerned with more terrestrial sciences. The other options relate to different domains: the exploration of weather patterns fits within meteorology, the analysis of terrestrial environments involves ecology and Earth sciences, and the investigation of human physiology pertains to biology and medicine. These fields center on Earth or living organisms rather than the investigation of space, which solidifies why the best descriptor for 'space study' is the examination of celestial objects and phenomena.