Post by 1dave on Mar 4, 2021 0:56:21 GMT -5
Sorry, but I'm not impressed with the information scientists are willing to share.
We should know that comets are created from material gravitationally attracted from material ejected by supernovas.
Newly minted elements (size dependent on star size), and shattered remnants of planets that once orbited those stars. We have many photos of "Cometary Knots" -each knot LARGER THAN OUR ENTIRE SOLAR SYSTEM but about the mass of Pluto - expanding from many star remnants. ALL NEW STARS, PLANETS, AND SOLAR SYSTEMS are formed from those remnants.
Instead they pretend that we are in a closed solar system totally separated from the rest of the universe.
www.newscientist.com/article/dn8842-comet-wild-2-made-from-fire-and-ice/
Comet Wild 2 made from 'fire and ice'
Comet Wild 2 made from 'fire and ice'
Space 14 March 2006
By Maggie Mckee
New Scientist Default Image
Dust particles entering a sponge-like “aerogel” collector leave carrot-shaped tracks about a centimetre long
(Image: NASA)
New Scientist Default Image
Olivine, a compound of iron, magnesium and other elements, forms at temperatures of about 1100°C – its presence in the icy Comet Wild 2 is surprising
(Image: NASA)
Pristine dust from a comet that formed in the icy region beyond Neptune contains material that was once heated to a scorching 1100°C, a preliminary analysis of NASA’s Stardust mission reveals.
The surprising finding suggests that some material in the outer solar system was transported there from the blisteringly hot region near the Sun – or perhaps from another star entirely. The results were presented at the Lunar and Planetary Science Conference in Houston on Monday.
The discovery comes just two months after a capsule containing dust from the Comet Wild 2 parachuted back to Earth. After studying about two dozen of the million or so dust grains captured from the comet, scientists found minerals – such as olivine, pyroxene and spinel – that form at “red-hot” or “white-hot” temperatures in excess of 1000°C.
“Remarkably enough, we have found fire and ice,” says principal investigator Don Brownlee of the University of Washington in Seattle, US. “In the coldest part of the solar system, we have found samples that formed at high temperature.”
Hot history
That is surprising because Comet Wild 2, which now orbits the Sun between Mars and Jupiter, is thought to have formed and spent most of its life in the Kuiper Belt, a ring of icy objects beyond Neptune. Scientists thought most of the dust there would be small – about 0.25 microns across – and unstructured, like glass – similar to the dust between stars.
Instead, many of the grains are 10 microns wide and crystalline in structure, which suggests they were once heated to scorching temperatures. Some dust must therefore have originated close the Sun – within the orbit of Mercury – or close to another star before travelling to the Kuiper Belt.
Previous work by Frank Shu, then at the University of California in Berkeley, US, and colleagues suggests a possible mechanism for local dust transport. Intense electrical currents would have been produced in the early solar system where magnetic fields from its rotating dusty disc interacted with those of the infant Sun.
The magnetic currents near the Sun could have lifted material out of the disc and channelled it away from the Sun, “flash-heating” it, explains Stardust curator Michael Zolensky of NASA’s Johnson Space Center in Houston, Texas, US.
Conveyor belt
After being heated close to the Sun, it could fall back into the disc in the outer solar system, he says. The process could have repeated in a conveyor belt-like scenario for the first few million years of the solar system’s existence.
Future tests of the isotopes in the minerals will determine whether the grains came from our solar system or from another star entirely. But similar heating detected in interplanetary dust grains that fell into Earth’s atmosphere show they came from our solar system, bolstering the so-called “X-wind model” developed by Shu and colleagues.
The new find suggests the disc that formed the solar system “was not this sedate, slow merry-go-round,” says team member Scott Sandford of NASA’s Ames Research Center in Moffett Field, California, US. “It was a pretty wild place.”
solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/81p-wild/in-depth/
en.wikipedia.org/wiki/81P/Wild
We should know that comets are created from material gravitationally attracted from material ejected by supernovas.
Newly minted elements (size dependent on star size), and shattered remnants of planets that once orbited those stars. We have many photos of "Cometary Knots" -each knot LARGER THAN OUR ENTIRE SOLAR SYSTEM but about the mass of Pluto - expanding from many star remnants. ALL NEW STARS, PLANETS, AND SOLAR SYSTEMS are formed from those remnants.
Instead they pretend that we are in a closed solar system totally separated from the rest of the universe.
www.newscientist.com/article/dn8842-comet-wild-2-made-from-fire-and-ice/
Comet Wild 2 made from 'fire and ice'
Comet Wild 2 made from 'fire and ice'
Space 14 March 2006
By Maggie Mckee
New Scientist Default Image
Dust particles entering a sponge-like “aerogel” collector leave carrot-shaped tracks about a centimetre long
(Image: NASA)
New Scientist Default Image
Olivine, a compound of iron, magnesium and other elements, forms at temperatures of about 1100°C – its presence in the icy Comet Wild 2 is surprising
(Image: NASA)
Pristine dust from a comet that formed in the icy region beyond Neptune contains material that was once heated to a scorching 1100°C, a preliminary analysis of NASA’s Stardust mission reveals.
The surprising finding suggests that some material in the outer solar system was transported there from the blisteringly hot region near the Sun – or perhaps from another star entirely. The results were presented at the Lunar and Planetary Science Conference in Houston on Monday.
The discovery comes just two months after a capsule containing dust from the Comet Wild 2 parachuted back to Earth. After studying about two dozen of the million or so dust grains captured from the comet, scientists found minerals – such as olivine, pyroxene and spinel – that form at “red-hot” or “white-hot” temperatures in excess of 1000°C.
“Remarkably enough, we have found fire and ice,” says principal investigator Don Brownlee of the University of Washington in Seattle, US. “In the coldest part of the solar system, we have found samples that formed at high temperature.”
Hot history
That is surprising because Comet Wild 2, which now orbits the Sun between Mars and Jupiter, is thought to have formed and spent most of its life in the Kuiper Belt, a ring of icy objects beyond Neptune. Scientists thought most of the dust there would be small – about 0.25 microns across – and unstructured, like glass – similar to the dust between stars.
Instead, many of the grains are 10 microns wide and crystalline in structure, which suggests they were once heated to scorching temperatures. Some dust must therefore have originated close the Sun – within the orbit of Mercury – or close to another star before travelling to the Kuiper Belt.
Previous work by Frank Shu, then at the University of California in Berkeley, US, and colleagues suggests a possible mechanism for local dust transport. Intense electrical currents would have been produced in the early solar system where magnetic fields from its rotating dusty disc interacted with those of the infant Sun.
The magnetic currents near the Sun could have lifted material out of the disc and channelled it away from the Sun, “flash-heating” it, explains Stardust curator Michael Zolensky of NASA’s Johnson Space Center in Houston, Texas, US.
Conveyor belt
After being heated close to the Sun, it could fall back into the disc in the outer solar system, he says. The process could have repeated in a conveyor belt-like scenario for the first few million years of the solar system’s existence.
Future tests of the isotopes in the minerals will determine whether the grains came from our solar system or from another star entirely. But similar heating detected in interplanetary dust grains that fell into Earth’s atmosphere show they came from our solar system, bolstering the so-called “X-wind model” developed by Shu and colleagues.
The new find suggests the disc that formed the solar system “was not this sedate, slow merry-go-round,” says team member Scott Sandford of NASA’s Ames Research Center in Moffett Field, California, US. “It was a pretty wild place.”
solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/81p-wild/in-depth/
en.wikipedia.org/wiki/81P/Wild
