Re: [meteorite-list] Wandering Jupiter Could Have Swept Inner Solar System Clean
"Raymond says that might explain the origin of iron meteorites, which some researchers argue should have formed relatively close to the sun." "We're not saying it happened. Just if it happened, what would it do?" H, and radioactive decay providing the heat for differentiation of all those different parent bodied iron meteorites? Or, how to we explain the 4.40 billion year old earth zircons found on Earth's surface in Australia? https://en.wikipedia.org/wiki/Oldest_dated_rocks#Oldest_terrestrial_material We've had better pie-in-the-sky theories made up by list members-- and worse one too ;-) With computers and discretional grants you can have transistors flip-flopping zillions of time testing theories that have no evidence, and they let you not only fit, but also publish your narrative! Let's grab a computer to show that not only *could* this be possible, but expand it, What if ... proto-life evolved on Jupiter when Jupiter was in Earth's place. Jupiter had several small moons at the time. There was a collision and Jupiter began to migrate once we tweaked this just right. Then, one small moon stayed behind as a result of the impact. Some of the meteorites that fell on the moon continued the path to life while Jupiter got too cold and arrested the development and kept growing from material it slowly collected according to the theory. Now the computer shows this is possible, we better publish that life may have started on Jupiter ... when Jupiter was where Earth is today, and Earth was but its moon. "I'm not saying it happened. Just if it happened, what would it do?" ;-) Kind wishes Doug (Noting the journal has an average of only a 21 day review period from submission to a decision...also that the first author began his academic life as a math major in a small college in Maine and runs a press/publicity section on his website covering plenty more things like this ...) -Original Message- From: Ron Baalke via Meteorite-list To: Meteorite Mailing List Sent: Tue, Mar 22, 2016 6:54 pm Subject: [meteorite-list] Wandering Jupiter Could Have Swept Inner Solar System Clean https://www.sciencenews.org/article/wandering-jupiter-could-have-swept-inner-solar-system-clean Wandering Jupiter could have swept inner solar system clean On its way out, infant planet left only enough debris for four small planets, simulation suggests By Christopher Crockett Science News March 15, 2016 A wandering baby Jupiter could help explain why there are no planets closer to the sun than Mercury and why the innermost planet is so tiny, a new study suggests. Jupiter's core might have formed close to the sun and then meandered through the rocky planet construction zone. As the infant Jupiter moved, it would have absorbed some planet-building material while kicking out the rest. This would have starved the inner planets - Mercury, Venus, Earth and Mars - of raw materials, keeping them small and preventing any other planets from forming close to the sun, say planetary scientist Sean Raymond and colleagues online March 5 in Monthly Notices of the Royal Astronomical Society. "When I first came up with it, I thought it was ridiculous," says Raymond, of the Laboratory of Astrophysics of Bordeaux in Floirac, France. "This model is kind of crazy, but it holds up." Rocky planets snuggled up to their suns are common in our galaxy. Many systems discovered by NASA's Kepler space telescope have multiple planets - several larger than Earth - crammed into orbits smaller than Mercury's. Though Kepler is biased toward finding scrunched-up solar systems, researchers wonder why there is a large gap between the sun and Mercury. Scientists suspect that the inner planets of our solar system formed 4.6 billion years ago from a belt of debris that stretched between the current orbits of Venus and Earth. Mercury and Mars were built out of material along the edges of this belt, which explains why they are relatively small. Jupiter, traditionally thought to have formed much farther out, gets the blame for creating the belt's outer edge. What shaped the inner edge has remained difficult to explain (SN Online: 3/23/15). Raymond and colleagues ran computer simulations to see what would happen to the inner solar system if a body with three times the mass of Earth started inside Mercury's orbit and then migrated away from the sun. They found that if the interloper didn't move too fast or too slow, it would sweep clean the innermost parts of the disk of gas and dust that encircled the young sun and leave just enough material to form the rocky planets. Raymond and colleagues also discovered that young Jupiter could have corralled enough debris to form a second core - one that got nudged away from the sun as Jupiter migrated. This second core could be the seed from which Saturn grew, the researchers suggest. Jupiter's gravity could have dragged
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[meteorite-list] Wandering Jupiter Could Have Swept Inner Solar System Clean
https://www.sciencenews.org/article/wandering-jupiter-could-have-swept-inner-solar-system-clean Wandering Jupiter could have swept inner solar system clean On its way out, infant planet left only enough debris for four small planets, simulation suggests By Christopher Crockett Science News March 15, 2016 A wandering baby Jupiter could help explain why there are no planets closer to the sun than Mercury and why the innermost planet is so tiny, a new study suggests. Jupiter's core might have formed close to the sun and then meandered through the rocky planet construction zone. As the infant Jupiter moved, it would have absorbed some planet-building material while kicking out the rest. This would have starved the inner planets - Mercury, Venus, Earth and Mars - of raw materials, keeping them small and preventing any other planets from forming close to the sun, say planetary scientist Sean Raymond and colleagues online March 5 in Monthly Notices of the Royal Astronomical Society. "When I first came up with it, I thought it was ridiculous," says Raymond, of the Laboratory of Astrophysics of Bordeaux in Floirac, France. "This model is kind of crazy, but it holds up." Rocky planets snuggled up to their suns are common in our galaxy. Many systems discovered by NASA's Kepler space telescope have multiple planets - several larger than Earth - crammed into orbits smaller than Mercury's. Though Kepler is biased toward finding scrunched-up solar systems, researchers wonder why there is a large gap between the sun and Mercury. Scientists suspect that the inner planets of our solar system formed 4.6 billion years ago from a belt of debris that stretched between the current orbits of Venus and Earth. Mercury and Mars were built out of material along the edges of this belt, which explains why they are relatively small. Jupiter, traditionally thought to have formed much farther out, gets the blame for creating the belt's outer edge. What shaped the inner edge has remained difficult to explain (SN Online: 3/23/15). Raymond and colleagues ran computer simulations to see what would happen to the inner solar system if a body with three times the mass of Earth started inside Mercury's orbit and then migrated away from the sun. They found that if the interloper didn't move too fast or too slow, it would sweep clean the innermost parts of the disk of gas and dust that encircled the young sun and leave just enough material to form the rocky planets. Raymond and colleagues also discovered that young Jupiter could have corralled enough debris to form a second core - one that got nudged away from the sun as Jupiter migrated. This second core could be the seed from which Saturn grew, the researchers suggest. Jupiter's gravity could have dragged debris to the asteroid belt, too. Raymond says that might explain the origin of iron meteorites, which some researchers argue should have formed relatively close to the sun. Jupiter plowing through the inner solar system sounds plausible, says Sourav Chatterjee, an astrophysicist at Northwestern University in Evanston, Ill. "But there are several ways this can go wrong." Building a giant planet core inside the orbit of Mercury is not hard, he says. Pebbles and boulders in the nascent solar system probably drifted inward. They could have piled up close to the sun where solar magnetic fields created turbulence that trapped infalling material. If just a fraction of this debris stuck together, a rocky orb a few times as massive as Earth could form. Having proto-Jupiter wander to the outer solar system, however, is asking a lot, says Chatterjee. Gravitational interactions with spiral waves in the disk that surrounded the sun can propel a newborn planet either inward or outward. But how fast, how far and in which direction the planet travels depends on properties such as disk temperature and density, which Raymond and colleagues readily acknowledge. Their simulations assume and simplify disk characteristics to see if building the solar system inside-out is even plausible. "We're building up a logical chain that shows [this idea] is not completely crazy," Raymond says. "We're not saying it happened. Just if it happened, what would it do?" __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Asphalt Volcanoes Provide Stable Home for Life
https://eos.org/articles/asphalt-volcanoes-erupt-in-slow-motion Asphalt Volcanoes Erupt in Slow Motion By Lauren Lipuma EOS - Earth & Space Science News March 15, 2016 Natural asphalt seeps on the ocean floor provide a stable home for diverse marine life that sequesters greenhouse gases. Underwater volcanoes erupt throughout the world, but in the southern Gulf of Mexico, they churn out something unusual: cold asphalt instead of hot lava. First discovered in 2003, these natural oil seeps at the bottom of the ocean provide a home and fuel for marine life. [Image] Asphalt volcanoes form above natural oil reservoirs deep below the seabed. Microorganisms degrade the oil, leaving asphalt and methane to seep out of the ocean floor. This diagram shows how these structures form. Credit: Jack Cook, Woods Hole Oceanographic Institution The highly diverse ecosystems that spring up around asphalt volcanoes do something else: sequester carbon. Federal laws protect deep-sea ecosystems on the U.S. side of the Gulf of Mexico, but on the Mexico side, no such protections exist. Because these sites occupy an area that is open to energy exploration and development, a multinational team of researchers has suggested that it is time to consider the best model to conserve them. Pavement Under the Sea Natural asphalt is a sticky, viscous form of oil. When microorganisms degrade oil from reservoirs below the seabed, they leave asphalt behind as a waste product. A team of German, U.S., and Mexican researchers discovered asphalt volcanoes at the Campeche Knolls in the southern Gulf of Mexico during an expedition in 2003. The researchers named the original site, covering more than a square kilometer in area, Chapopote, the Aztec word for tar. They found that as the asphalt seeped out of the seabed, it hardened and solidified in the cold water. Few processes add hard surfaces to the deep ocean, according to Ian MacDonald, a biological oceanographer at Florida State University in Gainesville and one of the researchers who discovered Chapopote. Most organisms that survive in the depths do so by burrowing under layers of the ocean bottom's sediments, MacDonald said, but asphalts provide a hard surface on which species such as ice worms and some types of mussels can grow. In addition, the seeps provide the starting materials for chemosynthesis - the process by which organisms use energy from inorganic chemical reactions to make their food. The German government funded return trips in 2006 and again in 2015 to further explore the asphalts and characterize the diverse fauna that inhabit them. MacDonald presented the results of the 2015 expedition at the 2016 Ocean Sciences Meeting in New Orleans. Slow Ooze, Harboring Hydrates When the team first discovered the asphalt volcanoes, they found that the asphalt looked strikingly similar to lava flows on land - asphalt flows change size, they get wrinkly, they fold over each other, MacDonald said. They speculated that the asphalt was released quickly in bursts, but when they returned in 2015, a closer look at the asphalt eliminated that possibility. By creating a photo mosaic of the main asphalt flow and examining its shape and how the asphalt had weathered over time, they realized that the asphalt oozed slowly out of the seabed, rather than erupting in a quick spurt. "The asphalts come out very slowly...tectonically slowly," MacDonald said. [Image] At deep asphalt volcano sites, gas hydrate outcrops, like this one seen in a panoramic view, form almost instantly. Credit: Ian MacDonald and Marum Center for Marine Environmental Sciences Unexpectedly, the research team found large mounds of gas hydrates'clusters of ice with methane trapped inside - on or near the volcanoes. They also found massive aggregations of chemosynthetic tube worms tens of meters long colonizing the hydrate mounds. Some of the tube worms may be hundreds of years old, they noted. Gas hydrates would normally dissolve quickly in seawater because the concentration of methane in the sea is so low, but the researchers suspect the tube worms help to stabilize the hydrate mounds. "The tube worms are creating a blanket that essentially sequesters the gas hydrate and stops it from dissolving into the seawater," MacDonald explained. Interocean Connectivity Chemosynthetic communities proliferate around hydrocarbon seeps in many areas along the equator, from the Gulf of Mexico to West Africa's Atlantic coast and even in the eastern Pacific. Before the Isthmus of Panama closed off the Atlantic from the Pacific, these waters were joined. "We think that, at some point, all of these communities were connected, and we still see a genetic relationship in some of the crustaceans between these sites," said Elva Escobar, an aquatic ecologist at the National Autonomous University of Mexico in Mexico City and a member of the research team. The group is now studying how th
[meteorite-list] Science Papers Reveal New Aspects of Pluto and its Moons
https://www.nasa.gov/feature/science-papers-reveal-new-aspects-of-pluto-and-its-moons Science Papers Reveal New Aspects of Pluto and its Moons Last Updated: March 17, 2016 Editor: Tricia Talbert [Image] This image of haze layers above Pluto's limb was taken by the Ralph/Multispectral Visible Imaging Camera (MVIC) on NASA's New Horizons spacecraft. About 20 haze layers are seen; the layers have been found to typically extend horizontally over hundreds of kilometers, but are not strictly parallel to the surface. For example, scientists note a haze layer about 3 miles (5 kilometers) above the surface (lower left area of the image), which descends to the surface at the right. Credits: NASA/JHUAPL/SwRI/Gladstone et al./Science (2016) A year ago, Pluto was just a bright speck in the cameras of NASA's approaching New Horizons spacecraft, not much different than its appearances in telescopes since Clyde Tombaugh discovered the then-ninth planet in 1930. But this week, in the journal Science, New Horizons scientists have authored the first comprehensive set of papers describing results from last summer's Pluto system flyby. "These five detailed papers completely transform our view of Pluto - revealing the former 'astronomer's planet' to be a real world with diverse and active geology, exotic surface chemistry, a complex atmosphere, puzzling interaction with the sun and an intriguing system of small moons," said Alan Stern, New Horizons principal investigator from the Southwest Research Institute (SwRI), Boulder, Colorado. [Images] Above are New Horizons' views of the informally named Sputnik Planum on Pluto (top) and the informally named Vulcan Planum on Charon (bottom). The Sputnik Planum strip measures 228 miles (367 kilometers) long, and the Vulcan Planum strip measures 194 miles (312 kilometers) long. Illumination is from the left. The bright, nitrogen-ice plains are defined by a network of crisscrossing troughs. This observation was obtained by the Ralph/Multispectral Visible Imaging Camera (MVIC) at a resolution of 1,050 feet (320 meters) per pixel. The Vulcan Planum view in the bottom panel includes the "moated mountain" Clarke Mons just above the center of the image. The water ice-rich plains display a range of surface textures, from smooth and grooved at left, to pitted and hummocky at right. This observation was obtained by the Long Range Reconnaissance Imager (LORRI) at a resolution of 525 feet (160 meters) per pixel. Credits: NASA/JHUAPL/SwRI After a 9.5-year, 3-billion-mile journey - launching faster and traveling farther than any spacecraft to reach its primary target - New Horizons zipped by Pluto on July 14, 2015. New Horizons' seven science instruments collected about 50 gigabits of data on the spacecraft's digital recorders, most of it coming over nine busy days surrounding the encounter. The first close-up pictures revealed a large heart-shaped feature carved into Pluto's surface, telling scientists that this "new" type of planetary world - the largest, brightest and first-explored in the mysterious, distant "third zone" of our solar system known as the Kuiper Belt - would be even more interesting and puzzling than models predicted. The newly published Science papers bear that out; click here for a list of top results. "Observing Pluto and Charon up close has caused us to completely reassess thinking on what sort of geological activity can be sustained on isolated planetary bodies in this distant region of the solar system, worlds that formerly had been thought to be relics little changed since the Kuiper Belt's formation," said Jeff Moore, lead author of the geology paper from NASA's Ames Research Center, Moffett Field, California. Scientists studying Pluto's composition say the diversity of its landscape stems from eons of interaction between highly volatile and mobile methane, nitrogen and carbon monoxide ices with inert and sturdy water ice. "We see variations in the distribution of Pluto's volatile ices that point to fascinating cycles of evaporation and condensation," said Will Grundy of the Lowell Observatory, Flagstaff, Arizona, lead author of the composition paper. "These cycles are a lot richer than those on Earth, where there's really only one material that condenses and evaporates - water. On Pluto, there are at least three materials, and while they interact in ways we don't yet fully understand, we definitely see their effects all across Pluto's surface. [Image] This enhanced color view of Pluto's surface diversity was created by merging Ralph/Multispectral Visible Imaging Camera (MVIC) color imagery (650 meters or 2,132 feet per pixel) with Long Range Reconnaissance Imager panchromatic imagery (230 meters or 755 feet per pixel). At lower right, ancient, heavily cratered terrain is coated with dark, reddish tholins. At upper right, volatile ices filling the informally named Sputnik Planum have modified the sur
[meteorite-list] Bright Spots and Color Differences Revealed on Ceres
http://www.jpl.nasa.gov/news/news.php?feature=6168 Bright Spots and Color Differences Revealed on Ceres Jet Propulsion Laboratory March 22, 2016 Scientists from NASA's Dawn mission unveiled new images from the spacecraft's lowest orbit at Ceres, including highly anticipated views of Occator Crater, at the 47th annual Lunar and Planetary Science Conference in The Woodlands, Texas, on Tuesday. Occator Crater, measuring 57 miles (92 kilometers) across and 2.5 miles (4 kilometers) deep, contains the brightest area on Ceres, the dwarf planet that Dawn has explored since early 2015. The latest images, taken from 240 miles (385 kilometers) above the surface of Ceres, reveal a dome in a smooth-walled pit in the bright center of the crater. Numerous linear features and fractures crisscross the top and flanks of this dome. Prominent fractures also surround the dome and run through smaller, bright regions found within the crater. "Before Dawn began its intensive observations of Ceres last year, Occator Crater looked to be one large bright area. Now, with the latest close views, we can see complex features that provide new mysteries to investigate," said Ralf Jaumann, planetary scientist and Dawn co-investigator at the German Aerospace Center (DLR) in Berlin. "The intricate geometry of the crater interior suggests geologic activity in the recent past, but we will need to complete detailed geologic mapping of the crater in order to test hypotheses for its formation." Color Differences The team also released an enhanced color map of the surface of Ceres, highlighting the diversity of surface materials and their relationships to surface morphology. Scientists have been studying the shapes of craters and their distribution with great interest. Ceres does not have as many large impact basins as scientists expected, but the number of smaller craters generally matches their predictions. The blue material highlighted in the color map is related to flows, smooth plains and mountains, which appear to be very young surface features. "Although impact processes dominate the surface geology on Ceres, we have identified specific color variations on the surface indicating material alterations that are due to a complex interaction of the impact process and the subsurface composition," Jaumann said. "Additionally, this gives evidence for a subsurface layer enriched in ice and volatiles." Counting Neutrons Data relevant to the possibility of subsurface ice is also emerging from Dawn's Gamma Ray and Neutron Detector (GRaND), which began acquiring its primary data set in December. Neutrons and gamma rays produced by cosmic ray interactions with surface materials provide a fingerprint of Ceres' chemical makeup. The measurements are sensitive to elemental composition of the topmost yard (meter) of the regolith. In Dawn's lowest-altitude orbit, the instrument has detected fewer neutrons near the poles of Ceres than at the equator, which indicates increased hydrogen concentration at high latitudes. As hydrogen is a principal constituent of water, water ice could be present close to the surface in polar regions. "Our analyses will test a longstanding prediction that water ice can survive just beneath Ceres' cold, high-latitude surface for billions of years," said Tom Prettyman, the lead for GRaND and Dawn co-investigator at the Planetary Science Institute, Tucson, Arizona. The Mystery of Haulani Crater But the subsurface does not have the same composition all over Ceres, according to data from the visible and infrared mapping spectrometer (VIR), a device that looks at how various wavelengths of sunlight are reflected by the surface, allowing scientists to identify minerals. Haulani Crater in particular is an intriguing example of how diverse Ceres is in terms of its surface material composition. This irregularly-shaped crater, with its striking bright streaks of material, shows a different proportion of surface materials than its surroundings when viewed with the VIR instrument. While the surface of Ceres is mostly made of a mixture of materials containing carbonates and phyllosilicates, their relative proportion varies across the surface. "False-color images of Haulani show that material excavated by an impact is different than the general surface composition of Ceres. The diversity of materials implies either that there is a mixed layer underneath, or that the impact itself changed the properties of the materials," said Maria Cristina de Sanctis, the VIR instrument lead scientist, based at the National Institute of Astrophysics, Rome. Water at Oxo Dawn scientists also reported in an LPSC scientific session that the VIR instrument has detected water at Oxo Crater, a young, 6-mile-wide (9-kilometer-wide) feature in Ceres' northern hemisphere. This water could be bound up in minerals or, alternatively, it could take the form of ice. Jean-Philippe Combe of the Bear Fig
[meteorite-list] Fw: Aztec, NM Meteorite questions
Forgot to hit "reply all" last night. Here's what I sent to Dennis. Frank On Monday, March 21, 2016 7:59 PM, Frank Cressy wrote: Hi Dennis, I researched Aztec for a book on US witnessed falls I writing (to be published this summer). Very little information was available even in Nininger's files at ASU. No information concerning the fireball was supplied by the finder, Mr. Dee Begay who found it about 30 miles south of Aztec on the Navajo Reservation. Apparently it fell about 5 pm on Feb 1, 1938. Begay contacted Nininger in March 1939 sending him a small sample of what he thought was a meteorite from this fall. Nininger the bought the 2.8 kg stone for $12.50. He cut off a specimen for his collection and the sold or traded the remainder to the Field Museum. That about all I have. (Nothing about the exact location of the stone was found at ASU). All the best, Frank On Monday, March 21, 2016 6:18 PM, Dennis Miller via Meteorite-list wrote: Hello, All! Living just 8 miles from Aztec, NM, thought that I might do a little fragment hunting. I have a few questions, though. First, I have read that Harvey Nininger sent his wife, Addie, to Aztec to purchase the only stone. Does anyone know who she purchased it from? Second, what was the flight path? And finally, does anyone have a small piece for sale? Thanks! Dennis IMCA #1434 P.S. Also looking for a piece of Four Corners meteorite. Sent from my iPad __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Aztec, NM Meteorite questions
Forgot to hit "reply all" last night. Here's what I sent to Dennis. Frank On Monday, March 21, 2016 7:59 PM, Frank Cressy wrote: Hi Dennis, I researched Aztec for a book on US witnessed falls I'm writing (to be published this summer). Very little information was available even in Nininger's files at ASU. No information concerning the fireball was supplied by the finder, Mr. Dee Begay who found it about 30 miles south of Aztec on the Navajo Reservation. Apparently it fell about 5 pm on Feb 1, 1938. Begay contacted Nininger in March 1939 sending him a small sample of what he thought was a meteorite from this fall. Nininger the bought the 2.8 kg stone for $12.50. He cut off a specimen for his collection and the sold or traded the remainder to the Field Museum. That about all I have. (Nothing about the exact location of the stone was found at ASU). All the best, Frank On Monday, March 21, 2016 6:18 PM, Dennis Miller via Meteorite-list wrote: Hello, All! Living just 8 miles from Aztec, NM, thought that I might do a little fragment hunting. I have a few questions, though. First, I have read that Harvey Nininger sent his wife, Addie, to Aztec to purchase the only stone. Does anyone know who she purchased it from? Second, what was the flight path? And finally, does anyone have a small piece for sale? Thanks! Dennis IMCA #1434 P.S. Also looking for a piece of Four Corners meteorite. Sent from my iPad __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: Dong Ujimqin Qi Contributed by: Anne Black http://www.tucsonmeteorites.com/mpodmain.asp?DD=03/22/2016 __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list