It may not have been far, far away, but it's really a long time ago.
Researchers have discovered some of the original interstellar dust that formed the Earth and Solar System Billions a year ago, a new study said.
The discovery is the "surviving interstellar dust substrate that formed the great building blocks of planets and stars", says study author Hope Ishii of the University of Hawaii at Manoa.
Researchers collected the surviving antique dust from the upper atmosphere of the earth, where it was likely to be deposited from comets. As comets pass near the sun, they release dust that can reach the earth's orbit and dissolves through the atmosphere, where it can be collected and later studied with electron microscope.
"These interplanetary dust particles survived from the time before the planetary form formed bodies in the solar system, and provide insight into the chemistry of these ancient building blocks," said co-author James Cliston of Lawrence Berkeley National Laboratory in California.
The "dam" is actually small glassy grains called GEMS, or glass embedded with metal and sulfides – usually less than 1 / 100th thickness of a human hair.
An electron micrograph of an interplanetary dust article likely to come from a comet. (Photo: Hope Ishii)
Referring to our current understanding of how planets form, after reading the new study, astrophysician Ethan Siegel said id "our naive image of a disc that becomes very hot , fragments and cools to then form planets can be hopelessly simplified. Instead, we have learned that it can actually be cold, outer material that holds the key to our planetary backyard. "Siegel, who was not part of the research, wrote about the study in Forbes .
Leader author Ishii said that" if we have fingertips as the elements of planetary formation from 4.6 billion years ago, it's exciting and allows for a deeper understanding of the processes that were formed and then changed them, "she said.
Siegel called it" a huge discovery …. If the conclusions are time-tested, we may have just revolutionized our understanding of how all planetary systems will be available. "
The study was published on Monday in the Scientific Review Proceedings of the National Academy of Sciences.
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