The Man Finding Stardust on Earth - Until recently, experts thought it was impossible to collect cosmic dust in places inhabited by humans (2017)
A Norwegian jazz musician and citizen scientist,
#JonLarsen has figured out how to do something the experts thought was impossible—find specks of cosmic dust, called
#micrometeorites , amid the
#detritus of human habitation.
#Scientists look for these particles, which rain down constantly on
#Earth , in
#Antarctica and other pristine locations, but Larsen thought there should be a way to collect them in more populated places.
Some micrometeorites are
#real stardust—flecks from
#explodedstars . Others are likely created when
#asteroids collide and
#comets vaporize. Larsen learned to identify the unique features that take shape as the specks
#plummet through Earth’s
#atmosphere , first
#melting and then
#solidifying . The three examples shown here—from Larsen’s 2027 book
#InSearchofStardust—exhibit swirling ridges, golden spots of iron-nickel
#metal and
#sulfide , and crystal
#pyramids of minerals, which formed during the journey.
Larsen was able to find micrometeorites by washing the sludge that had accumulated in open roof gutters, sifting it, and then using a magnet to extract particles from the remaining grit. After approaching many scientists, he finally persuaded
#MatthewGenge , a
#planetary #scientist at Imperial College London, to examine 48 particles he had collected. Genge analyzed their composition and confirmed that Larsen had indeed managed to find extraterrestrial dust amid earthly debris. “Jon was the one staring down the microscope,” says Genge, “going through hundreds of thousands of particles to find just one micrometeorite.”
Order In Search of Stardust: Amazing Micrometeorites and Their Terrestrial Imposters Hardcover Book – August 1, 2017 via Amazon.
In Search of Stardust is the first comprehensive popular science book about micrometeorites. It's also a photo documentary comprising more than 1,500 previously unpublished images: the first atlas of micrometeorites, hundreds of which are depicted here in high-resolution color
#microscopicphotography and in scanning electron
#microscope imagery.