Located about 2.5 million light-years away in the constellation Andromeda, Messier 32, (M32) or NGC 221, is a fascinating dwarf elliptical galaxy that orbits the famous Andromeda Galaxy (M31). With its compact size and intriguing characteristics, M32 has captured the attention of astronomers for centuries.
M32, smaller bright object in center of above image, is relatively small compared to its larger neighbor, M31, object taking up the left of the image. It spans only about 6,500 light-years in diameter, making it roughly one-tenth the size of the Milky Way. This compact nature, combined with its proximity to M31, has led to its classification as a satellite galaxy of the Andromeda Galaxy.
M32 is thought to have formed billions of years ago through a series of gravitational interactions and mergers with other galaxies. Its lack of spiral arms and overall smooth appearance are typical features of dwarf elliptical galaxies, which are often considered to be the remnants of larger galaxies that have undergone extensive evolution.
One of the key features of M32 is its dense central stellar population. It hosts a significant number of older stars, which are primarily orange and red in color. These stars are part of the galaxy’s globular cluster system, and their presence contributes to M32’s overall reddish hue.
M32’s proximity to the Andromeda Galaxy has not gone unnoticed. Gravitational interactions between the two galaxies have left their marks on both. In particular, the stars on the side of M32 facing M31 are strongly influenced by tidal forces, causing them to be stripped away over time. This phenomenon has left M32 with a somewhat elongated shape.
While M32’s interactions with M31 have shaped its current appearance, they also hint at its future fate. Over the course of millions of years, M32 may eventually merge with its larger neighbor, contributing to the ongoing evolution of the Andromeda Galaxy.
In summary, Messier 32 is a compact and intriguing dwarf elliptical galaxy that orbits the Andromeda Galaxy. Its unique characteristics and proximity to M31 make it a valuable object of study for astronomers, shedding light on the complex processes of galactic evolution and interaction in the universe.
Capture Details:
Date Image captured: 9/12/2023
Telescope: Celestron Nexstar 8se
Reducer/Flattener: Celestron .63x Reducer/Flattener
Filter: Optolong L-Pro
Camera: ZWO ASI294 MC
Mount: Skywatcher EQM-35 Pro
Total Captured: 40 x 180 seconds
Total Time: 2 hours
Capture Software: N.I.N.A.
Guiding: PHD2, ZWO asi120mm mini
Processed in: PixInsight
Additional details on Astrobin.com.