This cometary-type interplanetary dust particle was collected by a NASA stratospheric aircraft. Its porous aggregate structure is evident in this scanning electron microscope image. Credit: Hope Ishii/University of Hawaii
Chemical studies show that dust particles originated in a low-temperature environment. Experiments conducted at the Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) helped to confirm that samples of interplanetary particles – collected from Earth’s upper atmosphere and believed to originate from comets – contain dust leftover from the initial formation of the solar system.
An international team, led by Hope Ishii, a researcher at the University of Hawaii at Manoa (UH Manoa), studied the particles’ chemical composition using infrared light at Ber...
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