Big fireballs! Meteorites bursting from the outer regions of the solar system gave rise to life on Earth 4.6 billion years ago.
Large fireballs from outer regions solar system A new study has revealed that life brought building materials to Earth 4.6 billion years ago.
Scientists Massachusetts Institute of Technology and Imperial College London He found carbonaceous chondrite, which contains potassium and zinc, in these ancient meteorites.
Potassium helps make cell fluids, and zinc is important in building DNA.
The team determined that these space rocks make up ten percent of the space rocks that broke up during the birth of the planet.
The other 90 percent came from the non-carbon (NC) material of the inner solar system.
Life on Earth began 4.6 billion years ago with fireballs colliding with the newborn planet
“Our studies complement and confirm each other’s results in many ways,” lead study author Dr. Nicole Nie told SWS.
“Among the moderately volatile elements, potassium is the least volatile, and zinc is one of the most volatile.”
Meteorites provided 20 percent of Earth’s potassium and half of its zinc.
Both are considered volatile substances, which are elements or compounds that change from solid or liquid to vapor at relatively low temperatures.
Professor Mark Rehkamper, lead author of the Department of Earth Sciences and Engineering, Imperial College London, said this in his speech. statement: “Our data suggest that about half of Earth’s zinc supply was delivered by material from the outer Solar System beyond Jupiter’s orbit.
“Based on current models of the early development of the solar system, this was completely unexpected.”
Previous studies have suggested that Earth is formed almost exclusively from material from the inner Solar System, which researchers believe is the main source of Earth’s volatile chemicals.
However, the new study provides the first evidence that the Earth formed in part from carbonaceous meteorites from asteroids in the outer main belt.
“This contribution of outer Solar System material played an important role in building Earth’s inventory of volatile chemicals,” Rehkämper said.
“It appears that without material from the outer Solar System, Earth would have much less volatile matter than we know today – making it drier and potentially less able to nourish and sustain life.”
The team analyzed 18 meteorites,11 went from the inner region, and the rest from the desert regions.
The meteorites contained potassium and zinc and traveled from the outer regions of the solar system.
And then, they measured the relative abundance of five different forms – or isotopes – of zinc.
They then compared each isotopic fingerprint to samples of Earth to estimate how much these materials contribute to Earth’s zinc inventory, showing that only ten percent of Earth’s mass is composed of carbonaceous bodies.
The researchers found that material with high concentrations of zinc and other volatile components may also be relatively abundant in water, providing clues about the origin of water on Earth.
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