M33-final5 (Stephen Duffy)

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M33-final5

Spiral galaxy M33 is located in the triangle-shaped constellation Triangulum, earning it the nickname the Triangulum galaxy. About half the size of our Milky Way galaxy, M33 is the third-largest member of our Local Group of galaxies following the Andromeda galaxy (M31) and the Milky Way.
Blue-colored regions scattered throughout the image reveal numerous sites of rapid star birth in M33. In fact, Hubble’s observations reveal that the Triangulum galaxy’s star formation rate is ten times higher than the average found in the Andromeda galaxy.

The Triangulum galaxy’s orderly spiral structure displays few signs of interactions with nearby galaxies. However, that could change in the future. Only slightly farther away from us than the Andromeda galaxy, about 3 million light-years from Earth, M33 is a suspected gravitational companion to Andromeda, and both galaxies are moving toward our own. M33 could become a third party involved in the impending collision between the Andromeda and Milky Way galaxies more than 4 billion years from now.

M33 has a relatively bright apparent magnitude of 5.7, making it one of the most distant objects that keen-eyed observers can view with the unaided eye (under exceptionally clear and dark skies). Although a telescope will start to reveal some of M33’s spiral features, the diffuse galaxy is actually easiest to examine with low magnification and a wide field of view, such as through binoculars. It is best observed in October.
Text from NASA Goddard
Taken Oct 4-8 2021 from Santa Rosa CA.
TEC 140, MYT, QSI 683
HaLRGB 3:9:3:3:3 hours
Reprocessed January 2023

Sacramento Valley Astronomical Society

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