NASA's Hubble space telescope captured a closer image of NGC 474, a galaxy surrounded by shells many believe formed billions of years ago.
an image of two galaxies locked in a dance. Now, though, a new photo gives us a great look at a galaxy surrounded by shells.
The galaxy in question is NGC 474, and it’s an elliptical galaxy. Hubble recently captured an image of the galaxy up close, revealing more about its size. Scientists estimate the galaxy to be 2.5 times larger than our own Milky Way galaxy. But, as I noted above, this size isn’t the only interesting feature.
That’s because several layered shells surround the galaxy. Scientists aren’t exactly sure what caused the shells. However, they believe that it could have been caused by galactic mergers. Such a merger could possibly have created the different layered shells. NASA says it would be similar to how a pebble dropped into a pond might create ripples across the water.As I noted above, NGC 474 is located in mostly empty space. Overall, it’s roughly 100 million light-years away from the Earth.
Because of its interesting features, scientists have studied the tidal shells that surround the galaxy. Multiple studies have come out about how the shells formed, though the general consensus still seems to be that NGC 474 absorbed another galaxy billions of years ago. What makes this galaxy surrounded by shells even more intriguing, though, is that it’s moving away from the Sun.
Scientists believe that the galaxy is moving away at a rate of 2412 kilometers a second thanks to dark energy. As such, it may continue to get further and further away from the Sun. Astronomers also discovered a supernova within the galaxy. They named it SN 2017fgc upon its discovery in 2017.
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