Arthur Kosowsky
Viewpoint
Can we test inflationary expansion of the early universe?
A set of proposed relations among observable quantities may allow strong tests of whether a rapid expansion of the very early universe produced the seeds of the large-scale structure we see today. Read More »
Viewpoint
Connecting the Bright and Dark Sides of Galaxies
A universal law shows that the rotation of a disk galaxy is determined entirely by the visible matter it contains, even if the disk is mostly filled with dark matter. Read More »