Astronomers: something unknown like a bullet punched a hole in the milky Way

Scientists of the Harvard-Smithsonian center for astrophysics in confusion. Something “unknown, dense, invisible through telescopes and consisting, probably not normal matter like a bullet pierced and made a giant hole inside our galaxy the milky Way”. Evidence of this was presented at the conference of the American physical society in Denver (USA) specialist astrophysicist Anna, Bonaca.

It finds holes in the milky Way, located in a long stellar stream GD-1. They are groups of stars, moving along the orbits of galaxies. They were once a small ball cluster or a dwarf galaxy, and now they fly.

Under normal conditions, notes the researcher, the flow should stretch more or less in line with one break where we originally found a globular cluster before the stars began to scatter in different directions. But, Bonaca demonstrated that GD-1 has a second gap. Interestingly, this second fracture there are ragged edges, like something huge broke out of the thread not so long ago and dragged behind a part of stars under the action of an enormous force of attraction.

“We cannot ascribe this phenomenon to any glowing object was observed before. This is something much more massive than the stars. Something a million times more massive than our Sun. Stars of this mass just yet. We can’t explain. If we were talking about a black hole, it would have to be supermassive, as that is the center of our galaxy,” — said Bonaca in an interview with Live Science.

The academic believes that to exclude the possibility of the existence in the milky Way is the second supermassive black hole of course is impossible. However, in this case we would have noticed any signs of its presence such as a flash or radiation its accretion disk. At the same time, the astrophysicist, most of the large galaxies observed only one supermassive black hole in the center.


Another scientific assumption is a large clump of dark matter. However, Bonaca notes that the object is not necessarily completely 100% composed of dark matter.

“Maybe it’s a luminous object, which is hiding somewhere in the galaxy. However, this is unlikely because of its size, — and we are talking about 10-20 parsecs (30 to 65 light years) in diameter — it would be hard to hide,” adds scientist.

At the moment, is the only study of its kind, and it has not been published in any scientific journal with the name, but has received the approval of astrophysicists who gathered at the conference.

The work was carried out involving data from the Gaia space Observatory of the European space Agency, which is engaged in mapping stars and their movements inside the milky Way. Through this mission, scientists were able to compile the most complete at the current point in the catalogue of stars in our galaxy, which also got a stellar stream GD-1.

Your review has reinforced the data collected with the help of many-mirror Telescope, located in Arizona, which showed what the stars are moving towards Earth and which are opposite, distant. It helped her to identify stars that really are part of the flood GD-1, which was discovered the second hole and previously unseen region.

Bonaca notes that’s going to continue to work to find an unknown source of powerful gravity, through the hole in the star thread, but the main aim of her research is the mapping of clumps of dark matter scattered across the milky Way.