Astronomers were aware of the fact that there are stars that flung out of their home galaxies into the deep space, but recently they have found something which is rare and astonishing.

A team of astronomers said they have discovered that entire galaxies could be homeless. These galaxies toss out of their galactic cluster homes to roam around in the intergalactic space.

Eleven such homeless galaxies have been observed by the astronomers. As per astronomers, these galaxies could be victims of gravitational disturbances that have left them alone, drifting and marooned, in the space between galactic clusters.

Igor Chilingarian, astronomer working with the Harvard-Smithsonian Center for Astrophysics and Moscow State University, said in a statement that these galaxies have a lonely future, and are exiled from the galaxy clusters were they used to live.

Researchers in an explanation said these galaxies might have departed from their homes galaxies if they are accelerated by their by gravitational upset to a speed greater than their home location's ‘escape velocity’.

Further explaining the process, they said for a star to escape our Milky Way galaxy, it would need to achieve a speed of more than 1.2 million miles per hour.

And for an entire galaxy to escape from its mother galaxy, it could need a speed almost as high as 6 million mph, depending on the mass of the entire cluster, the researchers note.

Study co-author Ivan Zolotukhin said, “The first compact ellipticals were all found in clusters because that's where people were looking. We broadened our search, and found the unexpected”.

Zolotukhin said the phenomenon suspected of making these galaxies homeless is quite similar to processes known to happen in the center of our own Milky Way galaxy.