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Two high-speed pieces of space junk narrowly missed a big collision – The Queens County Citizen

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A dead Soviet satellite and an abandoned Chinese rocket body have crashed into each other rapidly in space this week, but were far from a catastrophic accident on Thursday night.

Leo Labs, a company that uses radar Track satellites and debris In space, Said On Tuesday it said it was monitoring a “very high-risk” conjunction – an intersection of two objects’ orbits around Earth.

The company used its radar array to monitor every two objects when it crossed the overhead three or four times a day from Friday.

Data indicate that two large pieces of space junk are missing from each other 8 to 43 meters (26 to 141 feet) Thursday night at 8:56 p.m.

On Wednesday, when the estimated miss distance was just 12 meters (19 feet), Leo Labs calculated a 10 percent chance of hitting objects.

It may seem trivial, but NASA normally moves the International Space Station when the orbiting laboratory is only 0.001 percent (1 in 100,000) more likely to encounter iding with an object.

Since both the Soviet satellite and the Chinese rocket body were not working, no one could move them out of each other. The astronomer said that if they were ide, an explosion equivalent to the explosion of 14 metric tons of TNT would send rockets of debris in all directions. Jonathan McDowell.

10 minutes after the fusion, when the rocket body flew over Leo Labs radar, there was only one object – the company tweeted that “there were no signs of debris”.

“Bullet Dodge,” McDowell Said On Twitter. “But space debris is still a big problem.”

The collision may not have endangered anyone on Earth, as the satellites are 991 kilometers (616 miles) from Earth and cross the Antarctic Ocean over the Veddel Sea. But as a result thousands of spacecraft fragments were dangerous in Earth’s orbit.

Experts at Aerospace Corporation have calculated very few collisions: 1 in just 23 billion by Thursday morning, with objects estimated to miss 70 meters (230 feet) from each other.

“The space-wreck community is constantly alerting us to these close policies, and we are not lying or lying about it,” Ted Mulhapt, who oversees The Aerospace Corporation’s space-wreck analysis, told Business Insider.

“Any of them is a low probability event, because the space is still very large. But when you take these items and combine them, sooner or later you’ll see the rewards. It’s time for us to go through another big collision with our models.”

Space collisions make clouds of dangerous high-speed debris

Nearly 130 million bits of space junk Currently orbiting the Earth, from abandoned satellites, detached spaceship and other missions. Those debris travel at about 10 times the speed of a bullet, which is fast enough to cause deadly damage to important equipment no matter how small the pieces.

Such a hit can kill astronauts on a spaceship.

The problem is exacerbated when collisions between space junk pieces cause objects to disintegrate into smaller pieces.

“Every time there is a big conflict, it’s a big change in LEO [low-Earth orbit] Environment, ”Dan Sepperley, CEO of Leo Labs Previously told Business Insider.

Two events in 2007 and 2009 increased the size of large debris in low Earth orbit 70 percent.

The first was the China test of an anti-satellite missile, in which China fired one of its own weather satellites. Two years later, an American spacecraft accidentally hit a Russian.

“Because of that, there’s a debris belt now,” Sepperley said.

India conducted its own satellite missile test in 2019, and that explosion created a prediction 6,500 ruins Larger than the eraser.

The satellite fired by India has a mass of less than one metric ton.

Combined, the Soviet satellite and the Chinese rocket body that cared for each other weighed nearly three metric tons (2,800 kilograms). Depending on those large volumes, the collision could create a significant cloud of hazardous debris.

High-risk satellite combinations are becoming more common

This is not the first time Leo Labs has warned the world about the possibility of a high-risk satellite merger. In January, the company calculated Collision between Dead Space Telescope and old US Air Force satellite.

Objects did not crash, but Seperley said the two satellites were “canceled, so basically no one was keeping an eye on them.”

The U.S. Air Force, which tracks satellites for the government, did not inform NASA about the potential collision, the space agency told Business Insider at the time.

Expert warnings about space junk grew even more urgent from that miss.

“We have recently determined the number of combinations,” Dan Oltrog, an astronomer, told Business Insider, which researched orbital debris at Analytical Graphics, Inc.

Oltrose uses a software system that has been collecting and estimating conjunction data for the past 15 years. In recent times in orbital encounters, he says, “seems to be well-connected with the newly launched large-star cluster spacecraft.”

The largest constellations he represents are Internet satellite clusters, which companies like SpaceX, Amazon and OneWeb plan to launch. In total, the companies plan to launch more than 100,000 satellites by the end of the decade. Since May 2019, SpaceX has already launched nearly 800 new satellites into Earth orbit.

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The catastrophe of wreckage can reduce our access to space

If the space-junk problem is exacerbated, the chain of collisions will get out of control and surround the Earth in an impassable field of debris. Donald J. Snyder, who worked at NASA’s Johnson Space Center and calculated in a 1978 paper.

“It’s a long-term impact that will last for decades and centuries,” Mulhapt said Told Business Insider In January. “Anything that does a lot of debris increases that risk.”

The number of objects in Earth’s orbit could already have a Kessler-like effect – a risk described last week by Rocket Lab CEO Peter Beck.

“It will have a huge impact on the launch side,” he said Told CNN Business, Rockets “should try and weave between these [satellite] Constellations. “

This article was originally published Business Insider.

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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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