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Nearly 30,000 objects are hurtling through near-Earth orbit. That’s not just a problem for space

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Once upon a time, gazing at the night sky was an escape from manmade messiness on Earth.

Not anymore.

Nearly 70 years after the launch of Sputnik, there are so many machines flying through space, astronomers worry their light pollution will soon make it impossible to study other galaxies with terrestrial telescopes.

Then there is the space junk — nearly 30,000 objects bigger than a softball hurtling a few hundred miles above Earth, ten times faster than a bullet.

And after NOAA used high-flying aircraft to take first-in-a-generation samples of the stratosphere, new science shows that the for-profit space race is changing the sky in measurable ways and with potentially harmful consequences for the ozone layer and Earth’s climate.

“We can see the fingerprint of human space traffic on stratospheric aerosol,” said Troy Thornberry, a research physicist at NOAA’s Chemical Sciences Laboratory. “Adding a lot of material to the stratosphere that was never there before is something that we’re considering, as well as the sheer mass of material that we put into space.”

The study found that 10% of the particles in the upper atmosphere now contain bits of metal from rockets or satellites falling out of orbit and burning up. As humanity becomes increasingly dependent on information beamed down from above, the report predicts manmade debris will make up 50% of stratospheric aerosols in coming decades, matching the amount created naturally by the galaxy.

While there is uncertainty over how this will affect the ozone layer — and a complicated climate system already in crisis — the commercial shift from solid rocket boosters on NASA’s Space Shuttles to the kerosene that fuels SpaceX rockets has added tons of new fossil fuel emissions with every launch, while aging satellites create clouds of debris as they deorbit.

“We’re talking about constellations of thousands of satellites that each weigh a ton or so, and when they come down they’re acting like meteoroids,” Thornberry told CNN.

According to the tracking site Orbiting Now, there are more than 8,300 satellites currently overhead, and predictions of how many will soon join them vary wildly.

More than 300 commercial and government entities have announced plans to launch a staggering 478,000 satellites by 2030, but that number is likely inflated by hype. The US Government Accountability Office predicted 58,000 satellites will launch in the next six years. Other analysts recently estimated the number likely to make it to orbit is closer to 20,000.

But even the lowest estimates would have been inconceivable in the giddy aftermath of Neil Armstrong’s one small step. 1972’s “Blue Marble” photo from Apollo 17 may have inspired Earth Day, but few considered the orbital garbage created to take it until 1979, when NASA scientist Donald Kessler published a paper titled “Collision Frequency of Artificial Satellites: The Creation of a Debris Belt.”

Ever since, “Kessler Syndrome” — depicted with appropriate suspense in the 2013 film “Gravity” — has been shorthand for the industry’s worry that too much space traffic will eventually create a vicious cycle of more debris leading to even more collisions until launches become impossible.

In low-earth orbit, objects can collide at around 23,000 miles an hour, enough for even the tiniest debris to crack the windows on the International Space Station. All told, it is estimated that there are 100 million pieces of manmade debris the size of a pencil tip whizzing in orbit — a major risk of doing business in space.

“Ten years ago, people thought that our founder was crazy for even talking about space debris,” Ron Lopez told CNN while strolling past the Smithsonian Air and Space Museum in Washington, DC. “Now you can’t go to a space conference without a panel or a series of talks on space sustainability and the debris issue.”

Lopez is president of the US branch of Astroscale, a Japanese company competing for market share in the emerging field of orbital debris removal.

“In the Gold Rush, it was the folks that made the pickaxes and the shovels that often did better than the prospectors,” he said. “And in a sense, that’s exactly what we’re bringing to the market.”

A depiction of Astroscale’s “On Closer Inspection” mission, which aerospace company Rocket Lab launched on February 18. – Rocket Lab

Lopez admits that they are a long way from flying garbage trucks, orbiting recycling centers and a “circular economy in space,” but in 2022, Astroscale used a satellite with a strong magnet to catch a moving target launched in the same 3-year mission.

“It was the first commercially funded spacecraft to demonstrate a lot of the technologies that will be required to do docking and rendezvous with other satellites,” he said. “It could be that we move them, eventually refuel them, or in some cases, deorbit them to address the debris problem.”

A second Astroscale mission, launched from New Zealand by aerospace company Rocket Lab on February 18, is going to take a closer look at space junk. The satellite, named ADRAS-J, will observe the motions of a rocket stage that was left in low-Earth orbit in 2009. Astroscale’s mission will use cameras and sensors to study the rocket debris and figure out how to get it out of orbit.

But with a pollution crisis now painfully evident on land, at sea and now in space, one of the most symbolic launches since Sputnik is scheduled for this summer, when scientists from Japan and NASA launch the world’s first biodegradable satellite, made mostly of wood.

One small step, indeed.

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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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