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Israeli astronomer and partner identify first interstellar meteor to hit Earth – The Times of Israel

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An Israeli astronomer and his research partner identified the first interstellar meteor known to have hit the Earth, the US military has confirmed.

The space rock crashed into our atmosphere off the coast of Papua New Guinea in 2014, and is the third object known to have visited our solar system from outside of the sun’s orbit.

Avi Loeb, a Harvard astronomer from Israel, and his research partner Amir Siraj determined that it came from outside our solar system in 2019, but were unable to confirm the finding until this month.

Loeb is a well-known and controversial astronomer who argues that another interstellar visitor, an object called Oumuamua that hurtled past the sun in 2017, could have been made by an alien civilization.

Scientists have also identified a comet that came into our neighborhood from another solar system, making the 2014 meteor the third known interstellar object, and the first to strike the Earth. Meteors are relatively small celestial objects made of rock and metal that enter the Earth’s atmosphere.

Loeb and Siraj were met with skepticism when they announced the finding, until the US military confirmed their results.

The US Space Command, part of the US Department of Defense, said its deputy commander, John E. Shaw,  and chief scientist, Joel Mozer, confirmed that the “previously-detected interstellar object was indeed an interstellar object.”

The data “confirmed that the velocity estimate reported to NASA is sufficiently accurate to indicate an interstellar trajectory.”

The Space Command scientists analyzed additional data to confirm Loeb and Siraj’s finding, and presented the results to NASA and the European Space Agency. Space Command is responsible for US military operations in space and monitors space objects that could threaten the Earth.

NASA disputed the Space Command confirmation of the meteor, saying, “the short duration of collected data, less than five seconds, makes it difficult to definitively determine if the object’s origin was indeed interstellar.”

The meteor, known as CNEOS 2014-01-08, was about the size of a dishwashing machine and streaked into our atmosphere near Papua New Guinea’s Manus Island on January 8, 2014.

Siraj wrote in Scientific American this week that US government satellites designed to detect missile launches collected data on the meteor.

Siraj was an undergraduate at Harvard at the time of the discovery, with Loeb acting as his adviser. The two were studying Oumuamua when they began looking for other interstellar objects, and soon came across the data on the meteor.

The Perseid meteor shower, seen in Marganell, Spain, on August 12, 2016. (AP Photo/Manu Fernandez)

Siraj said dozens of similar meteors strike Earth each year, but this one was traveling exceptionally fast and coming from an unusual direction, indicating it came from outside of our solar system.

The meteor was traveling in an “unbound orbit,” while other meteors travel in closed orbits as they circle around the sun. Before hitting Earth, the meter had been traveling at a speed of around 60 kilometers (37 miles) per second, far faster than other meteors.

Loeb and Siraj drafted a paper on their discovery and submitted it for peer-reviewed publication, but journals refused the research, citing its reliance on confidential information. Some of the US government data is kept secret for security reasons. The pair said at the time they were 99.999% confident in their conclusions.

Israeli Harvard scientist Avi Loeb. (Screenshot/YouTube)

They were later approached by a defense official who was able to get official Defense Department confirmation of the find.

The meteor is the third interstellar object ever sighted in our solar system, after Oumuamua and a comet sighted in 2019 called Birosov, neither of which hit the Earth. Comets are smaller objects made out of ice, dust and rocky particles; asteroids are much larger bodies made of rock and metal.

Siraj said his and Loeb’s findings on the interstellar meteor imply that there are many more such objects. He said its speed suggests it could have come from “deep within another planetary system,” close to that system’s star, as opposed to the edge of another system, which was seen as more likely.

The researchers are looking into whether it’s possible to retrieve fragments of the meteor from the bottom of the Pacific Ocean, calling a physical sample “the holy grail of interstellar object studies.” The meteor broke up as it entered our atmosphere.

Loeb was the longest-serving chair of Harvard’s Department of Astronomy, a position he held from 2011-2020, and is currently a tenured science professor at the university.

Related: Israeli Harvard astronomer has an inalienable gravitation to interstellar study

He came to public prominence after asserting that Oumuamua, an anomalous object from outside the solar system observed tumbling past the sun in 2017, could have been an extraterrestrial artifact.

Astronomers in Hawaii only glimpsed the object they called Oumuamua, meaning “scout” in Hawaiian, as it careened away from the sun, moving irregularly. The strangely shaped body was the first known interstellar object seen in our solar system. It appeared to be small, under 1 kilometer in length, dark red and shaped like either a cigar or a pancake.

An artist’s impression of the interstellar asteroid Oumuamua. Scientist Avi Loeb believes it could have been an extraterrestrial artifact. (Courtesy/European Southern Observatory, M. Kornmesser)

Loeb argued Oumuamua could have been an extraterrestrial artifact, such as a light sail powered by solar rays, or a communication dish. Most astronomers believe it was natural in origin, but differ in opinion on what it was, or where it came from.

He launched the Galileo Project last year, an initiative that will systematically search for physical artifacts produced by “extraterrestrial technological civilizations.” Previous programs, such as the SETI Institute, scoured the cosmos in search of electromagnetic signals, not objects.

The Galileo Project aims to identify unidentified aerial phenomena and “Oumuamua-like interstellar objects” through scientific analysis of data collected with cutting-edge instruments. The data and analytical process will be transparent and open to the public, the group said.

Siraj is now the director of interstellar object studies for the Galileo Project, and said this week that the group has received funding to research a possible “spacecraft rendezvous” with an interstellar object to extract a physical sample.

Loeb is from the moshav of Beit Hanan in central Israel, served in the Israel Defense Forces’ prestigious Talpiot program and received his first degree from the Hebrew University in Jerusalem.

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Here’s how Helene and other storms dumped a whopping 40 trillion gallons of rain on the South

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More than 40 trillion gallons of rain drenched the Southeast United States in the last week from Hurricane Helene and a run-of-the-mill rainstorm that sloshed in ahead of it — an unheard of amount of water that has stunned experts.

That’s enough to fill the Dallas Cowboys’ stadium 51,000 times, or Lake Tahoe just once. If it was concentrated just on the state of North Carolina that much water would be 3.5 feet deep (more than 1 meter). It’s enough to fill more than 60 million Olympic-size swimming pools.

“That’s an astronomical amount of precipitation,” said Ed Clark, head of the National Oceanic and Atmospheric Administration’s National Water Center in Tuscaloosa, Alabama. “I have not seen something in my 25 years of working at the weather service that is this geographically large of an extent and the sheer volume of water that fell from the sky.”

The flood damage from the rain is apocalyptic, meteorologists said. More than 100 people are dead, according to officials.

Private meteorologist Ryan Maue, a former NOAA chief scientist, calculated the amount of rain, using precipitation measurements made in 2.5-mile-by-2.5 mile grids as measured by satellites and ground observations. He came up with 40 trillion gallons through Sunday for the eastern United States, with 20 trillion gallons of that hitting just Georgia, Tennessee, the Carolinas and Florida from Hurricane Helene.

Clark did the calculations independently and said the 40 trillion gallon figure (151 trillion liters) is about right and, if anything, conservative. Maue said maybe 1 to 2 trillion more gallons of rain had fallen, much if it in Virginia, since his calculations.

Clark, who spends much of his work on issues of shrinking western water supplies, said to put the amount of rain in perspective, it’s more than twice the combined amount of water stored by two key Colorado River basin reservoirs: Lake Powell and Lake Mead.

Several meteorologists said this was a combination of two, maybe three storm systems. Before Helene struck, rain had fallen heavily for days because a low pressure system had “cut off” from the jet stream — which moves weather systems along west to east — and stalled over the Southeast. That funneled plenty of warm water from the Gulf of Mexico. And a storm that fell just short of named status parked along North Carolina’s Atlantic coast, dumping as much as 20 inches of rain, said North Carolina state climatologist Kathie Dello.

Then add Helene, one of the largest storms in the last couple decades and one that held plenty of rain because it was young and moved fast before it hit the Appalachians, said University of Albany hurricane expert Kristen Corbosiero.

“It was not just a perfect storm, but it was a combination of multiple storms that that led to the enormous amount of rain,” Maue said. “That collected at high elevation, we’re talking 3,000 to 6000 feet. And when you drop trillions of gallons on a mountain, that has to go down.”

The fact that these storms hit the mountains made everything worse, and not just because of runoff. The interaction between the mountains and the storm systems wrings more moisture out of the air, Clark, Maue and Corbosiero said.

North Carolina weather officials said their top measurement total was 31.33 inches in the tiny town of Busick. Mount Mitchell also got more than 2 feet of rainfall.

Before 2017’s Hurricane Harvey, “I said to our colleagues, you know, I never thought in my career that we would measure rainfall in feet,” Clark said. “And after Harvey, Florence, the more isolated events in eastern Kentucky, portions of South Dakota. We’re seeing events year in and year out where we are measuring rainfall in feet.”

Storms are getting wetter as the climate change s, said Corbosiero and Dello. A basic law of physics says the air holds nearly 4% more moisture for every degree Fahrenheit warmer (7% for every degree Celsius) and the world has warmed more than 2 degrees (1.2 degrees Celsius) since pre-industrial times.

Corbosiero said meteorologists are vigorously debating how much of Helene is due to worsening climate change and how much is random.

For Dello, the “fingerprints of climate change” were clear.

“We’ve seen tropical storm impacts in western North Carolina. But these storms are wetter and these storms are warmer. And there would have been a time when a tropical storm would have been heading toward North Carolina and would have caused some rain and some damage, but not apocalyptic destruction. ”

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Follow AP’s climate coverage at https://apnews.com/hub/climate

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Follow Seth Borenstein on Twitter at @borenbears

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Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.

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‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

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It’s a dinosaur that roamed Alberta’s badlands more than 70 million years ago, sporting a big, bumpy, bony head the size of a baby elephant.

On Wednesday, paleontologists near Grande Prairie pulled its 272-kilogram skull from the ground.

They call it “Big Sam.”

The adult Pachyrhinosaurus is the second plant-eating dinosaur to be unearthed from a dense bonebed belonging to a herd that died together on the edge of a valley that now sits 450 kilometres northwest of Edmonton.

It didn’t die alone.

“We have hundreds of juvenile bones in the bonebed, so we know that there are many babies and some adults among all of the big adults,” Emily Bamforth, a paleontologist with the nearby Philip J. Currie Dinosaur Museum, said in an interview on the way to the dig site.

She described the horned Pachyrhinosaurus as “the smaller, older cousin of the triceratops.”

“This species of dinosaur is endemic to the Grand Prairie area, so it’s found here and nowhere else in the world. They are … kind of about the size of an Indian elephant and a rhino,” she added.

The head alone, she said, is about the size of a baby elephant.

The discovery was a long time coming.

The bonebed was first discovered by a high school teacher out for a walk about 50 years ago. It took the teacher a decade to get anyone from southern Alberta to come to take a look.

“At the time, sort of in the ’70s and ’80s, paleontology in northern Alberta was virtually unknown,” said Bamforth.

When paleontogists eventually got to the site, Bamforth said, they learned “it’s actually one of the densest dinosaur bonebeds in North America.”

“It contains about 100 to 300 bones per square metre,” she said.

Paleontologists have been at the site sporadically ever since, combing through bones belonging to turtles, dinosaurs and lizards. Sixteen years ago, they discovered a large skull of an approximately 30-year-old Pachyrhinosaurus, which is now at the museum.

About a year ago, they found the second adult: Big Sam.

Bamforth said both dinosaurs are believed to have been the elders in the herd.

“Their distinguishing feature is that, instead of having a horn on their nose like a triceratops, they had this big, bony bump called a boss. And they have big, bony bumps over their eyes as well,” she said.

“It makes them look a little strange. It’s the one dinosaur that if you find it, it’s the only possible thing it can be.”

The genders of the two adults are unknown.

Bamforth said the extraction was difficult because Big Sam was intertwined in a cluster of about 300 other bones.

The skull was found upside down, “as if the animal was lying on its back,” but was well preserved, she said.

She said the excavation process involved putting plaster on the skull and wooden planks around if for stability. From there, it was lifted out — very carefully — with a crane, and was to be shipped on a trolley to the museum for study.

“I have extracted skulls in the past. This is probably the biggest one I’ve ever done though,” said Bamforth.

“It’s pretty exciting.”

This report by The Canadian Press was first published Sept. 25, 2024.

The Canadian Press. All rights reserved.

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The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

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TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

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