Detecting a group of 'ghost galaxies'

The Hubble Space Telescope has captured images of three strange galaxies and their existence can help scientists explain one of the mysteries of the universe.

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Hercules, Leo IV and Ursa Major, the names of the three galaxies discovered by the Hubble glass near the Milky Way, are so dwarf galaxies (small in size) and dim so astronomers call them "ghost galaxies" . They formed about 13 billion years ago and for some reason they stopped growing after a while. Because the universe was born about 13.7 billion years ago, they are certainly the oldest celestial bodies, Space reported.

"These galaxies are remnants from the early age of the universe. They have the same age and have remained virtually unchanged over the past 13 billion years. Some reason makes the process of star creation abruptly in all three. galaxy, " said Tom Brown, an expert at the Space Telescope Science Institute in the US. He is the team leader of three galaxies.

One of the more unusual features of Hercules, Leo IV and Ursa Major is that they seem to have about 100 times more dark matter than regular matter. Meanwhile, the amount of dark matter in younger, brighter and younger galaxies that humans discovered near the Milky Way is only about 10 times larger than matter.

The presence of the "ghost galaxy" can help scientists explain the mysterious disappearance of satellite galaxies. For example, the hypotheses predict that the Milky Way has several thousand satellite galaxies, but in fact humans only broadcast a few satellite galaxies around the Milky Way. So many experts believe that most of the galaxy's satellite galaxy is missing. But the cause of their disappearance has not been found.