Cometary-type Interplanetary Dust Particle (IMAGE) University of Hawaii at Manoa Caption This cometary-type interplanetary dust particle, L2005AR7, was collected by NASA stratospheric aircraft. Its porous aggregate structure is evident in this scanning electron microscope image. Credit Hope Ishii, University of Hawai'i Usage Restrictions Image may be used with appropriate caption and credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.