What telescope did Edwin Hubble use for his later work on supernovae?

The telescope Edwin Hubble used for his later observational work, including studies connected with supernovae and nebulae, was the Hale Telescope. This 200-inch reflector stood at Palomar Observatory in California and was the largest optical telescope in the world when it began operating.

Hubble directed the Hale Telescope's first-light observations on January 26, 1949, photographing NGC 2261, also called Hubble's Variable Nebula. The instrument extended the kind of deep-sky work Hubble had begun with the smaller Hooker Telescope at Mount Wilson.

The two telescopes are often confused because both were associated with Hubble. The Hooker Telescope was the 100-inch instrument that enabled his landmark work showing that Andromeda was a separate galaxy. The Hale Telescope was the later 200-inch successor, used during the final phase of Hubble's career at Palomar.