Scientists have recently discovered eleven galaxies which were evicted from its mother clusters, calling it "homeless" and "runaway," the Science Magazine reported.
Astronomer Igor Chilingarian from Moscow State University and Harvard Smithsonian Astrophysics Center said, "These galaxies are facing a lonely future, exiled from the galaxy clusters they used to live in," Phys published.
The runaway stars could be booted from its mother galaxies when they are traversing faster than its home galaxy's "escape" velocity that is typically around 537 kilometers each second, approximately 1.2 million miles each hour.
This new discovery is made more special by the presence of the entire galaxies roaming in space, rather just spotting stars that has been a common occurrence through the years. Depending on its parent galaxy's mass, the travelling runaway galaxy must have been travelling around 6 million miles per hour or 3, 000 kilometers per second.
Ivan Zolotukhin, a co-researcher from the L'Institut de Recherche en Astrophysique stumbled upon the discovery while he was reviewing the Sloan Digital Sky Survey and GALEX satellite data regarding elliptical galaxies. Zolotukhin explained, "The compact ellipticals were all discovered in clusters all because it is where people are setting their focus. Galaxies of this kind are tough to locate, but we found around 200 compact ellipticals, 11 of which are classified as runaway or homeless."
Both researchers established that all newly discovered runaway galaxies were moving speedily. With regards to why it was ousted from its parent home, Chilingarian revealed that it might be due to the same factors that cause stars to evacuate from their homeland.