It is highly uncommon for dwarf galaxies to appear in groups as studies suggest less than five percent of dwarf galaxies are neighbors with another.
This is irregular dwarf galaxy NGC 6822 - which is not part of the newly found group] D3 and D4 have developed 'tidal tails,' or thin, elongated regions of stars and interstellar gas that stretch out and away from the point where the galaxies collide.
New cluster of galaxies that 'interact with each other' defy prevailing model of our universe Astronomers have discovered an extremely rare group of five 'dwarf' galaxies that are 'interacting with each other' about 117 million light years away from Earth.
Dwarf galaxies contain a few billion stars, whereas standard galaxies have hundreds of billions, giving them low mass and luminosity.
They were designated from D1 to D5, and D3 and D4 are showing signs of mutual tidal interactions, which means their respective gravitational forces are pulling on each other and distorting the galaxies' shapes.
