An Object of ‘Astronomical Proportions’ is Punching Holes in our Galaxy

There is a “dark object” blasting massive holes in our galaxy. We can not see it and it may not be made of ordinary matter. In fact, it could be something that astronomers have never before identified until now.

And despite the fact that we cannot see the monstrous object, its effects have just been detected by astronomers, despite the fact that we haven’t directly seen what it is.

Astronomer Ana Bonaca, a researcher at the Harvard-Smithsonian Center for Astrophysics has called the mysterious object “a dense bullet of something.”

Evidence of the object’s existence was presented by Bonaca at the conference of the American Physical Society in Denver.

Invisible Bullet?

Evidence of the object blasting holes in our galaxy was discovered in our galaxy’s longest stellar stream, GD-1.

The top image shows us what the G-1 looks like., while the bottom images shows what it should look like. Image Credit: New Astrophysical Probes of Dark Matter, Ana Bonaca/GAIA.
The top image shows us what the G-1 looks like., while the bottom image shows what it should look like. Image Credit: New Astrophysical Probes of Dark Matter, Ana Bonaca/GAIA.

stellar stream is an association of stars orbiting a galaxy that was once a globular cluster or dwarf galaxy that has now been torn apart and stretched out along its orbit by tidal forces.

Bonaca explained to Live Science that usually, stellar streams are uniform, and should be more or less a single line, that’s stretched out by the massive gravity from our galaxy.

An image from Bonaca's presentations where we can see a detailed map of GD-1, revealing a second gap and spur. Image Credit: New Astrophysical Probes of Dark Matter, Ana Bonaca/GAIA.
An image from Bonaca’s presentations where we can see a detailed map of GD-1, revealing a second gap and spur. Image Credit: New Astrophysical Probes of Dark Matter, Ana Bonaca/GAIA.

Now, that stellar stream can have up to one gap, which is where the original globular cluster was before its stars started moving in two directions.

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However, what’s strange is that GD-1 has a second gap, and it has an extremly ragged edge.

This region has been nicknamed GD-1’s “spur”, and it looks as if something truly massive blasted into the stellar stream not long ago.

The impact was so powerful that whatever collided with the stellar stream dragged the stars with its gravity.

In other words, and as Bonaca has put it, the stellar stream seems to have been ‘hit’ by an ‘unseen’ bullet.

What is it really?

What that bullet is, we have no idea.

But it is big. It is powerful. We can’t see it. Did I say it is big?

“We can’t map [the impactor] to any luminous object that we have observed,” Bonaca explained to Live Science.

“It’s much more massive than a star… Something like a million times the mass of the sun. So there are just no stars of that mass. We can rule that out. And if it were a black hole, it would be a supermassive black hole of the kind we find at the center of our own galaxy.”

What it COULD be

There are a few theories out there what the enigmatic object could be. One theory is that there’s another, secondary supermassive black hole in our galaxy, and we should blame it.

Of course, we haven’t actually found evidnece that there’s another black hole in our galaxy, so we can’t be sure.

But in addition to the possibility that a Black Hole impacted GD-1, Bonaca argues that a big clump of dark matter may have crashed into the stellar stream. However, by no means does this signify that the object is made entirely of dark matter, Bonaca explained.

“It could be that it’s a luminous object that went away somewhere, and it’s hiding somewhere in the galaxy,” she added.

We do know that whatever the object is, its size is of epic proportions.

“We know that it’s 10 to 20 parsecs [30 to 65 light-years] across,” Bonaca revealed. “About the size of a globular cluster.”

Source
Live Science