It doesn't take a huge leap of imagination to see why M64 is better known as the Evil Eye galaxy.
Sitting in the abyssal vacuum of space it seems to cast a sinister glare across the cosmos, a cloud of dust framing its visible periphery like aThe galaxy is even stranger than it looks. Its hydrogen-rich outer disk orbits in the opposite direction to the galaxy's inner disk of stars, hinting at differences in their origins.
The discovery could be giving us a glimpse into the future of our own Milky Way galaxy. Estimates of the mass and contents of the shredded satellite suggest that it was remarkably similar to the Small Magellanic Cloud, a Milky Way satellite dwarf galaxy that will one day be subsumed into the larger mass.
"The mass of M64's counter-rotating outer gas disk is also comparable to the gas mass of the Small Magellanic Cloud, suggesting that the likeliest origin of M64's unique counter-rotating disk was a recent merger with a gas-rich satellite very similar to the Small Magellanic Cloud." Galaxy mergers are thought to be a very important part of galaxy growth and evolution. These events not only increase the mass of a galaxy, they infuse it with new material and gravitational interactions that increase star formation, keeping the galaxy alive with new generations of stars.over its long, 13.6 billion-year history, and we can see other galaxies in the Universe at various stages of the merger process.
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