The new Hubble image shows the galaxy NGC 5775, which is located about 85 million light-years from Earth in a group of galaxies called the Virgo Cluster. NGC 5775 is a spiral galaxy that is tilted away from Earth in such a way that only its edge is visible. This edge-on position of the galaxy has allowed astronomers to spot a vast halo of hot gas around NGC 5775, but how the material actually got there is unclear, researchers said. "Some astronomers think that hot gas from the disc is driven into the halo by supernova explosions, which is then returned to the disc as it cools - like a massive galactic fountain," according to a Hubble telescope image description. Because of the phenomenon, Hubble researchers dubbed it a "galactic fountain of youth" when they released the image this month.
There is also another oddity about the galaxy NGC 5775 that has attracted attention from astronomers: a bridge of hydrogen gas linking the galaxy with a galactic neighbor called NGC 5774. The two spiral galaxies are on a collision course and are in the early stages of merging, according to Hubble scientists. However, neither object has yet sprouted a tidal tail of gas and stars - created by intense gravitational disruptions - that typically precedes galaxy mergers. The Hubble Space Telescope is a joint project by NASA and the European Space Agency."