The odd line of galaxies can be made in a cosmic bullet

An awesome line of dwarf galaxies can be a result of a bullet like a cosmic collision.

Michael Keim At Yale University and his colleagues used the keck observatory in Hawaii to study a unique trail of 12 small and faint dwarf galaxies about 75 million light years from the milky way.

The orientation and speed of galaxies suggest that they come from head collision between two, called NGC 1052-DF2 and NGC 1052-DF4. The gas collision with its wake, which finally hit groups of stars under gravity.

“They are so wonderful,” says Keim. “This is the only system like this known.”

There is a similar collection of larger galaxies called Bullet clusterSo Keim and his companions primarily in this system are “bullet dwarf”.

The two galaxies were thought to crash each other 350 kilometers per second relative to each other about 9 billion years ago. As they passed each other, the gas was ripped from each galaxy. “It’s unlikely that the two stars collide,” Keim said. “But that’s not true for gas clouds.”

Wonderful, each of the clumps of stars left from the collision has no cloudy thing. This is very impressive that most galaxies have a large amount darkest thingSometimes recounting over 90 percent of their overall mass.

Keim and her partner thinks it because while gas is ripping from galaxies, dark things do not interact with the matter – or even himself – so it is not affected.

That can change alternative ideas for the darkest thing that suggests our evidence for its gravitational influence from a misdemeanor of how the stars behave. “This is said that dark thing is a fragment, and it can be separated from a galaxy,” says Keim.