Caption: The Triagulum Galaxy (M33, NGC 958, type Sc) in the constellation Triangulum.

M33 is at distance ∼ 0.9 Mpc and ∼ 10 kpc in galactic disk diameter.

It is part of the Local Group of galaxies. The Milky Way, the Andromeda Galaxy (M31, NGC 224), and M33 are the only large galaxies (i.e., NON-dwarf galaxies) and only spiral galaxies in the Local Group. M33 is relatively close to M31 (FK-593).

M33 is a flocculent spiral with fuzzy, poorly defined spiral arms thought to be formed by self-propagating star formation (CK-389).

The blue areas are due to hot young blue main-sequence stars (mainly OB stars) and the pink areas are due to H II regions.

Credit/Permission: © T.A.Rector (NRAO/AUI/NSF and NOAO/AURA/NSF) and M.Hanna (NOAO/AURA/NSF), NOAO, AURA, NSF, before or circa 2003 / NOAO/AURA Image Library Conditions of Use.
Download site: NOAO: M33, NGC598.
Image link: Itself.
Local file: local link: galaxy_triangulum_noao.html.
File: Galaxies file: galaxy_triangulum_noao.html.