What is the primary function of NASA's Hubble Space Telescope?

The primary function of NASA's Hubble Space Telescope is to conduct astronomical observations. Hubble is equipped with a variety of sophisticated instruments that allow it to capture detailed images and spectra of celestial objects beyond the capabilities of ground-based telescopes. Positioned in low Earth orbit, it avoids atmospheric distortion, which results in incredibly clear views of the universe.

The telescope has contributed significantly to many areas of astronomy, including the observation of distant galaxies, the study of nebulae, the tracking of comets, and the examination of exoplanets. Its observational capabilities have enabled discoveries that have broadened our understanding of the cosmos, such as determining the rate of the universe's expansion and capturing images of phenomena like black holes and supernovae.

In contrast, weather forecasting is unrelated to Hubble’s capabilities, as it focuses specifically on meteorological phenomena rather than astronomical ones. Planetary exploration generally involves spacecraft designed to study planets in our solar system and is not the focus of Hubble, which primarily investigates distant galaxies and stellar phenomena. Communications typically pertain to the relay of information and are not a function of Hubble. Acknowledging that Hubble is utilized primarily for astronomical observations underscores its vital role in the field of space science.