Astronomers using the Atacama Large Millimeter Array (ALMA) have captured an image of a dwarf galaxy made of mostly dark matter.
The image captured by ALMA shows distortions on light nearly 4 billion-light years away that are believed to be caused the gravity of an invisible dark matter galaxy.
The image as seen below shows faint red arcs surrounding a galaxy (shown in blue). The distortions are believed to be caused by an immense amount of dark matter. This matter does not emit or absorb light, it rather causes a gravitational lensing effect that produces what you can see in ALMA’s latest image.
“We can find these invisible objects in the same way that you can see rain droplets on a window. You know they are there because they distort the image of the background objects,” explains Yashar Hezaveh a Stanford University astronomer.
This research has a deep significance for astronomers; it means that we may have not been seeing a large majority of cosmic objects that are made up of mostly dark matter.
Astronomers and researches have been noticing gravitational distortions for decades and have been chalking them up to discrepancy. It’s possible we’re just scratching the surface of hidden objects in our universe.