Geomicrobiology And Microbial Geochemistry, December 2015, Vol. 11, No. 6
June 28, 2024
Origins Of Life: Transition From Geochemistry To Biogeochemistry, December 2016, Vol. 12, No. 6
June 28, 2024
Cosmic Dust, June 2016, Vol. 12, No. 3
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Cosmic dust is submillimeter debris shed by comets, asteroids, moons, and planets. In the Solar System, this dust scatters sunlight (the zodiacal light), and it is detected around other stars by its infrared emission.
Cosmic Dust
June 2016, Vol. 12, No. 3
Cosmic dust is submillimeter debris shed by comets, asteroids, moons, and planets. In the Solar System, this dust scatters sunlight (the zodiacal light), and it is detected around other stars by its infrared emission. Cosmic dust enters Earth’s atmosphere at high speeds and at a rate of 100 tons a day. These small particles are the largest source of extraterrestrial material accreting on the present-day Earth and include interplanetary dust particles and micrometeorites. Although atmospheric entry heating and terrestrial weathering have modified many, some particles are pristine primitive extraterrestrial materials that contain high abundances of isotopically anomalous presolar grains and primitive carbon compounds that have not been altered since their formation. Cosmic dust analysis provides invaluable information on initial planetary building materials.
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