The Warped Side of Dark Matter
Robert Irion
In recent years, research has confirmed that the luminous universe--our sun, our galaxy, and everything that shines--makes up but a wee bit of all there is. Instead, the strange new recipe calls for more than one-quarter "dark matter" and two-thirds "dark energy." Weak gravitational lensing, a subtle distortion of all distant galaxies, promises the most direct way of mapping the universe we can't see.