The Sciences

Charting the Unseen Sky

Maps shed some light on dark matter.

By Lacy SchleyOct 4, 2017 12:00 AM
ScreenShot20171006at103940AM.jpg
Click to enlarge. | Florent Leclercq et al. 2017

Newsletter

Sign up for our email newsletter for the latest science news
 

Cosmologists from the U.K., France and Germany have come up with new maps of how dark matter moves throughout the universe. Scientists can’t actually observe dark matter, which makes up about 27 percent of our universe’s total mass, since it doesn’t react to light. So these researchers had to infer its movement by using data from the Sloan Digital Sky Survey (SDSS), an ongoing project to create a 3-D map of the universe. Here, researchers have layered the location of galaxies (marked with black dots) pulled from the SDSS on top of their dark matter data. Warmer colors represent matter that’s headed our way, while cooler colors indicate matter that’s flying away from us. (Source: “The phase-space structure of nearby dark matter as constrained by the SDSS,” Journal of Cosmology and Astroparticle Physics, 2017)

1 free article left
Want More? Get unlimited access for as low as $1.99/month

Already a subscriber?

Register or Log In

1 free articleSubscribe
Discover Magazine Logo
Want more?

Keep reading for as low as $1.99!

Subscribe

Already a subscriber?

Register or Log In

More From Discover
Recommendations From Our Store
Shop Now
Stay Curious
Join
Our List

Sign up for our weekly science updates.

 
Subscribe
To The Magazine

Save up to 70% off the cover price when you subscribe to Discover magazine.

Copyright © 2022 Kalmbach Media Co.