Polaris was the first star discovered by the Hubble Space Telescope in 1990.

Lenticular galaxies are not a type of galaxy discovered by the Hubble Space Telescope.

IC 1101 is the largest galaxy discovered by the Hubble Space Telescope, with a diameter of about 6 million light-years.

Dark nebulae are not a type of nebula discovered by the Hubble Space Telescope.

51 Pegasi b was the first exoplanet discovered by the Hubble Space Telescope in 1995.

Asterisms are not a type of star cluster discovered by the Hubble Space Telescope.

TON 618 is the largest black hole discovered by the Hubble Space Telescope, with a mass of about 66 billion times that of the Sun.

Type Ic supernovae are not a type of supernova discovered by the Hubble Space Telescope.

GRB 970228 was the first gamma-ray burst discovered by the Hubble Space Telescope in 1997.

Seyfert galaxies are not a type of quasar discovered by the Hubble Space Telescope.

Sirius B was the first white dwarf discovered by the Hubble Space Telescope in 1994.

M dwarfs are not a type of brown dwarf discovered by the Hubble Space Telescope.

PSR B1919+21 was the first neutron star discovered by the Hubble Space Telescope in 1992.

Mini-Neptunes are not a type of planet discovered by the Hubble Space Telescope.

Phobos was the first moon discovered by the Hubble Space Telescope in 1978.