This artist's concept illustrates the preferred model for explaining ALMA observations of Beta Pictoris. At the outer fringes of the system, the gravitational influence of a hypothetical giant planet ... more 
This artist's concept illustrates the preferred model for explaining ALMA observations of Beta Pictoris. At the outer fringes of the system, the gravitational influence of a hypothetical giant planet (bottom left) captures comets into a dense, less 
1 / 6
SPACE.com | Photo By NASA's Goddard Space Flight Center/F. Reddy
Tue, Mar 11, 2014 2:30 PM EDT