There’s a “dark matter hurricane” blowing through our corner of the Milky Way galaxy. Right this second, it’s passing over Earth. And this fast-moving stream could reveal major details about dark matter, a new study finds.
The dark matter is traveling in what is known as the S1 stream. Scientists think that streams like this one are the cosmic debris leftover when small galaxies stray too close to the Milky Way. Our gravitational forces tear the smaller galaxy apart, leaving behind a traveling, elliptical stream of stars, darkmatterand other debris.
Dark matter is an elusive material that scientists think, if the Standard Model is correct, exists in large quantities throughout space. Scientists still don’t know what dark matter actually is — there are a number of leading theories, but no one knows for sure. But the S1 stream is predicted to be blowing dark matter past us at about 310 miles per second (500 km/s) right this moment, and that could provide an opportunity for detection.