The M100 galaxy, also known as NGC 4321, is one of the most mesmerizing spiral galaxies in the celestial vault. Nestled 60 million light-years away from Earth in the constellation Coma Berenices, this galaxy has captivated astronomers with its well-defined spiral structure. However, its location in a starless region makes it a challenge to spot without any reference points. The galaxy’s core is on the verge of visibility with high-powered binoculars but can be observed with a small to medium-sized telescope. It’s only through larger telescopes that its spiral form becomes discernible. Due to its declination, M100 is observable from all inhabited regions on Earth. For observers in the northern hemisphere, the best time to view this galaxy is in spring when it’s high in the sky.
This spectacular image taken by the Hubble Space Telescope highlights the two stellar populations that make up the galaxy: the young blue stars in its spiral arms and the older yellow ones in its core. This breathtaking view is a testament to the galaxy’s dynamic nature, offering a glimpse into the processes of stellar birth and evolution.
M100 forms part of the Virgo Cluster of galaxies and boasts a mass of 160 billion solar masses. Notably, it has been the site of seven observed supernovae, with the most recent ones occurring in April 2019 and January 2020. These celestial explosions offer astronomers valuable insights into the death of stars and the distribution of elements in the universe. M100 also houses a supermassive black hole and an intense star-forming ring, further adding to its intrigue and scientific importance. Its real diameter, spanning about 107,000 light-years, is similar to that of our own Milky Way galaxy.
Credit: NASA, ESA, Hubble; Processing: Judy Schmidt.
Gerd Dani — Founder & Director Gerd Dani is the visionary in a wheelchair behind FreeAstroScience. An astronomy graduate and a master's in physics, he founded this blog in June 2020, driven by a passion for breaking down complex scientific and philosophical concepts into bite-sized, digestible pieces. As President, he is dedicated to making science accessible to everyone, from students to seasoned academics.
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