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Japan's Hayabusa2 Asteroid Journey Ends With a Hunt in Australia's Outback – The New York Times

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Japan’s Journey to an Asteroid Ends With a Hunt in Australia’s Outback

The Hayabusa2 mission cements Japan’s role in exploring the solar system, but finding its asteroid cargo presents one last challenge.

Members of JAXA, Japan’s space agency, installed an antenna in Woomera, southern Australia, in preparation for the Hayabusa2’s return to Earth.
Credit…JAXA, via Associated Press

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  • Dec. 5, 2020, 12:01 a.m. ET

Japan’s space agency is nearing the end of a journey of discovery that aims to shed light on the earliest eons of the solar system and possibly provide clues about the origins of life on Earth.

But first, it is going to have to go on a scavenger hunt in the Australian outback.

This weekend, bits of an asteroid will land in a barren region near Woomera, South Australia. These are being ferried to Earth by Hayabusa2, a robotic space probe launched by JAXA, Japan’s space agency, in 2014 to explore an asteroid named Ryugu, a dark, carbon-rich rock a bit more than half a mile wide.

The success of the mission and the science it produces will raise Japan’s status as a central player in deep space exploration, together with NASA, the European Space Agency and Russia. JAXA currently has a spacecraft in orbit around Venus studying that planet’s hellish climate and is collaborating with the Europeans on a mission that is on its way to Mercury.

In the coming years, Japan plans to bring back rocks from Phobos, a moon of Mars, and contribute to NASA’s Artemis program to send astronauts to Earth’s moon.

But the immediate challenge will be searching in darkness for a 16-inch-wide capsule containing the asteroid samples somewhere amid hundreds of square miles in a region 280 miles north of Adelaide, the nearest large city.

“It’s really in the middle of nowhere,” said Shogo Tachibana, the principal investigator in charge of the analysis of the Hayabusa2 samples. He is part of a team of more than 70 people from Japan who have arrived in Woomera for recovery of the capsule. The area, used by the Australian military for testing, provides a wide open space that is ideal for the return of an interplanetary probe.

The small return capsule separated from the main spacecraft about 12 hours before the scheduled landing, when it was about 125,000 miles from Earth. JAXA will broadcast live coverage of the capsule’s landing beginning at 11:30 a.m. Eastern time on Saturday. (It will be pre-dawn hours on Sunday in Australia.)

The capsule is expected to hit the ground a few minutes before noon.

Credit…JAXA/JiJi Press, via Agence France-Presse — Getty Images
Credit…JAXA, via Associated Press
Credit…Agence France-Presse — Getty Images
Credit…JAXA/EPA, via Shutterstock

In an interview, Makoto Yoshikawa, the mission manager, said there is an uncertainty of about 10 kilometers, or about six miles, in pinpointing where the capsule will re-enter the atmosphere. At an altitude of six miles, the capsule will release a parachute, and where it will drift as it descends will add to the uncertainty.

“The landing place depends on the wind on that day,” Dr. Yoshikawa said. The area that searchers might have to cover could stretch some 60 miles, he said.

The trail of the fireball of superheated air created by the re-entering capsule will help guide the recovery team, as will the capsule’s radio beacon. The task will become much more difficult if the beacon fails or if the parachute fails to deploy.

There is a bit of a rush, too. The team hopes to recover the capsule, perform initial analysis and whisk it back to Japan within 100 hours. Even though the capsule is sealed, the worry is that Earth air will slowly leak in. “There is no perfect sealing,” Dr. Tachibana said.

Once the capsule is found, a helicopter will take it to a laboratory that has been set up at the Australian air force base at Woomera. There an instrument will extract any gases within the capsule that may have been released by the asteroid rocks as they were shaken and broken during re-entry. Dr. Yoshikawa said the scientists would also like to see if they can detect any solar wind particles of helium that slammed into the asteroid and became embedded in the rocks.

The gases would also reassure the scientists that Hayabusa2 did indeed successfully collect samples from Ryugu. A minimum of 0.1 grams, or less than 1/280th of an ounce, is needed to declare success. The hope is the spacecraft brought back several grams.

In Japan, the Hayabusa2 team will begin analysis of the Ryugu samples. In about a year, some of the samples will be shared with other scientists for additional study.

To gather these samples, Hayabusa2 arrived at the asteroid in June 2018. It executed a series of investigations, each of escalating technical complexity. It dropped probes to the surface of Ryugu, blasted a hole in the asteroid to peer at what lies beneath and twice descended to the surface to grab small pieces of the asteroid, an operation that proved much more challenging than expected because of the many boulders on the surface.

Displays in the Royal Australian Air Force’s Woomera range complex, where Hayabusa2’s landing will be monitored.
Credit…Morgan Sette/Agence France-Presse — Getty Images

Small worlds like Ryugu used to be of little interest to planetary scientists who focused on studying planets, said Masaki Fujimoto, deputy director general of the Institute of Space and Astronautical Science, part of JAXA. “Minor bodies, who cares?” he said. “But if you are serious about the formation of planetary systems, small bodies actually matter.”

Studying water trapped in minerals from Ryugu could give hints if the water in Earth’s oceans came from asteroids, and if carbon-based molecules could have seeded the building blocks for life.

Part of the Ryugu samples will go to NASA, which is bringing back some rocks and soil from another asteroid with its OSIRIS-REX mission. The OSIRIS-REX space probe has been studying a smaller carbon-rich asteroid named Bennu and it will start back to Earth next spring, dropping off its rock samples in September 2023.

Ryugu and Bennu turned out to be surprisingly similar in some ways, both looking like spinning tops and with surfaces covered with boulders, but different in other ways. The rocks on Ryugu appear to contain much less water, for one. The significance of the similarities and differences will not become clear until after scientists study the rocks in more detail.

“When the OSIRIS-REX sample comes back, we will have lessons learned from the Hayabusa2 mission,” said Harold C. Connolly Jr., a geology professor at Rowan University in New Jersey and the mission sample scientist for OSIRIS-REX. “The similarities and differences are absolutely fascinating.”

Credit…NASA/Goddard/University of Arizona
Credit…NASA/Goddard/University of Arizona, via Associated Press

Dr. Connolly hopes to go to Japan next summer to take part in analyzing the Ryugu samples.

Hayabusa2 is not Japan’s first planetary mission. Indeed, its name points to the existence of Hayabusa, an earlier mission that brought back samples from another asteroid, Itokawa. But that mission, which launched in 2003 and returned in 2010, faced major technical problems. So did JAXA’s Akatsuki spacecraft, currently in orbit around Venus, which the Japanese agency managed to restore to a scientific mission after years of difficulty. A Japanese mission to Mars also failed in 2003.

By contrast, operations of Hayabusa2 have gone almost flawlessly, even though it retains the same general design as its predecessor. “Actually, there are no big issues,” Dr. Yoshikawa, the mission manager, said. “Of course, small ones.”

He said the team studied in detail the failures on Hayabusa and made changes as needed, and also conducted numerous rehearsals to try to anticipate any contingencies it might encounter.

The Japanese missions generally operate on smaller budgets than NASA’s and thus often carry fewer instruments. Hayabusa2’s cost is less than $300 million while OSIRIS-REX’s price will run about $1 billion.

Dropping off the Ryugu samples is not the end of the Hayabusa2 mission. After releasing the return capsule, the main spacecraft shifted course to avoid a collision with Earth, missing by 125 miles. It will now travel to another asteroid, a tiny one designated 1998 KY26 that is only 100 feet in diameter but spinning rapidly, completing one rotation in less than 11 minutes.

Hayabusa2 will use two flybys of Earth to fling itself toward KY26, finally arriving in 2031. It will conduct some astronomical experiments during its extended deep space journey, and the spacecraft still carries one last projectile that it may use to test that space rock’s surface.

Credit…Agence France-Presse — Getty Images

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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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