What scientific field is listed for Edwin Hubble's career?

Edwin Hubble’s scientific career is listed under astronomy.

Hubble became one of the twentieth century’s most influential astronomers by establishing that the Milky Way is not the entire universe. Working at California’s Mount Wilson Observatory, he used the 100-inch Hooker Telescope to study faint nebulae and resolve individual stars in the Andromeda Nebula.

His observations in the 1920s showed that Andromeda was a separate galaxy far beyond the Milky Way. Hubble later helped demonstrate that distant galaxies are generally receding, providing evidence that the universe is expanding. These achievements made him central to modern observational astronomy and cosmology.

Hubble’s path was not straightforward. He studied mathematics and astronomy at the University of Chicago, then spent several years at Oxford studying law as a Rhodes Scholar. After briefly practicing law, he returned to astronomy. The Hubble Space Telescope was named in his honor because of his foundational contributions to the study of galaxies and the expanding universe.