13 November 2009
Vol 326, Issue 5955

About The Cover

Cover image expansion

COVER The Interstellar Boundary Explorer (IBEX) spacecraft has returned the first global images of the interaction of our heliosphere with the local interstellar medium. IBEX observations show a ribbon of energetic neutral atoms (reds to greens), snaking between the positions of the two Voyager spacecraft (white dots). This ribbon marks the region where the galactic magnetic field (gray lines) wraps most tightly around the heliosphere's boundary. See the series of Reports starting on page 959. Image: Patrick McPike/Adler Planetarium