Telescope "Hubble" accidentally discovered the tiny galaxy near the Milky Way
Modern astronomy is really reached a very high technological level. Thus, we can observe the events and phenomena that took place at a distance of more than 13 billion light-years. We have seen how neutron stars collide; currently we are trying to determine the exact nature and source of fast puzzling radio bursts (FRB) and, possibly, in this year for the first time will be able to see the event horizon of a black hole. The universe is huge and full of mysteries that we have yet to solve. But the recent discovery shows that some of the puzzles can literally hide under our noses, and their detection can be a usual matter of chance.
Watching Space Telescope "Hubble for the globular cluster NGC 6752, has about 13 thousand light-years away in the halo of the Milky Way, astronomers have made a surprising discovery - a small dim galaxies located just 30 million light-years from Earth.
"The main objective of our work was to determine the age of the globular clusters of the Milky Way, remote from us at 13, 5 thousand light years, which we have studied a population of white dwarfs in it. However, looking at the data, we suddenly noticed a compact group of stars. After a thorough analysis of their brightness and temperature, it became clear that these lights do not belong to the cluster NGC 6752, and there are a few million light-years farther, "- the researchers report in an article published in the journal Monthly Notices of the Royal Astronomical Society.
The researchers found that Bedin 1 very tiny, very isolated and very ancient galaxy. Its size is only 3,000 light-years, which is 10 times smaller than our Milky Way. In this case, it is about 1000 times dimmer than our galaxy. The object was classified as a dwarf spheroidal galaxy, which in addition to the small size and characterized by the absence of galactic dust and star formation processes.
Normally dwarf spheroidal galaxies are adjacent to larger galaxies or clusters (e.g., from 36 detected galaxies of this type 22 of them are satellites of our Milky Way) but Bedin 1 in this respect to them quite unlike. Closest to her galaxy NGC 6744 is located about 2 million light-years.
With photometric methods scientists have identified a low content of metals in the galaxy. And since the Distribution of heavy elements (e.g., metal) in the universe occurs with loss of stars within which these elements are formed, their low concentration in Bedin 1 may indicate that the galaxy contains a lot of old stars. Define the properties of stars Bedin 1, the scientists were also able to establish the approximate age of this tiny galaxy. He is 13 billion years old. Add here still 0, 8 billion - get the age of the universe. With all these features, Bedin 1 can be regarded as an astronomical equivalent of "fossils" from the era of the early universe.
It can come as no surprise, and another fact. Taking into account the distance to the object, its isolation from other galaxies, its low brightness and its concealment for the light more bright stars, located in front of him - surprisingly, it was generally found, the more "Hubble", which for nearly 30 years.
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