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Artemis 1 is off—and we’re a step closer to using moon dirt for construction in space

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Credit: John Raoux

NASA has just launched its first rocket in the Artemis program, which will, among other things, take scientific experiments to produce metal on the moon.

In recent years, a number of businesses and organizations have ramped up efforts to establish technologies on the moon. But doing work in is expensive. Sending just one kilogram of material to the moon can cost US$1.2 million (A$1.89 million).

What if we could save money by using the resources that are already there? This process is called in-situ resource utilization, and it’s exactly what astrometallurgy researchers are trying to achieve.

Why the moon?

The moon has amazing potential for future space exploration. Its gravity is only one-sixth as strong as Earth’s, which makes it much easier to fly things from the moon to Earth’s orbit than to fly them direct from Earth! And in an industry where every kilogram costs a fortune, the ability to save money is extremely attractive.

Although people have been looking at making oxygen and in space for decades, the Artemis program marks the first time we have solid plans to make and use in space.

A number of companies are looking at extracting metals and oxygen from moon dirt. At first these will be demonstrations, but eventually moon metal will be a viable option for construction in space.

As a researcher in this field, I expect that in about 10 to 20 years from now we’ll have demonstrated the ability to extract metals from the moon, and will likely be using these to construct large structures in space. So exactly what will we be able to extract? And how would we do it?

Artemis 1 is off—and we're a step closer to using moon dirt for construction in space
On a clear night, you can see the Moon’s two geologic regions – the darker maria and the lighter highlands. Credit: Shutterstock

What’s out there?

There are two main geological regions on the moon, both of which you can see on a clear night. The dark areas are called the maria and have a higher concentration of iron and titanium. The light areas are called the highlands (or terrae) and have more aluminum.

In general, the dirt and rocks on the moon contain silicon, oxygen, aluminum, iron, calcium, magnesium, titanium, sodium, potassium and manganese. That might sound like a mouthful, but it’s not really that much to choose from. There are some other trace elements, but dealing with those is a spiel for another day.

We know metals such as iron, aluminum and titanium are useful for construction. But what about the others?

Well, it turns out when you have limited options (and the alternative is spending a small fortune), scientists can get pretty creative. We can use silicon to make solar panels, which could be a primary source of electricity on the moon. We could use magnesium, manganese and chromium to make metal alloys with interesting properties, and sodium and potassium as coolants.

There are also studies looking at using the reactive metals (aluminum, iron, magnesium, titanium, silicon, calcium) as a form of battery or “energy carrier“. If we really needed to, we could even use them as a form of solid rocket fuel.

So we do have options when it comes to sourcing and using metals on the moon. But how do we get to them?

How would extraction work?

Artemis 1 is off—and we're a step closer to using moon dirt for construction in space
Researchers at the University of Glasgow used an electrolysis separation process to get a pile of metal (right) from simulated Moon dirt (left). Credit: Beth Lomax/University of Glasgow

While the moon has metals in abundance, they’re bound up in the rocks as oxides—metals and oxygen stuck together. This is where astrometallurgy comes in, which is simply the study of extracting metal from space rocks.

Metallurgists use a variety of methods to separate metals and oxygen from within rocks. Some of the more common extraction methods use chemicals such as hydrogen and carbon.

Some such as “electrolytic separation” use pure electricity, while more novel solutions involve completely vaporizing the rocks to make metal. If you’re interested in a full rundown of lunar astrometallurgy you can read about it in one of my research papers.

Regardless of the method used, extracting and processing metals in space presents many challenges.

Some challenges are obvious. The moon’s relatively weak gravity means traction is basically nonexistent, and digging the ground like we do on Earth isn’t an option. Researchers are working on these problems.

There’s also a lack of important resources such as water, which is often used for metallurgy on Earth.

Other challenges are more niche. For instance, one moon day is as long as 28 Earth days. So for two weeks you have ample access to the Sun’s power and warmth … but then you have two weeks of night.

Temperatures also fluctuate wildly, from 120℃ during the day to -180℃ at night. Some permanently shadowed areas drop below -220℃! Even if resource mining and processing were being done remotely from Earth, a lot of equipment wouldn’t withstand these conditions.

YouTube video
Artemis 1 took off spectacularly just after 5pm AEDT on November 16.

That brings us to the human factor: would people themselves be up there helping out with all of this?

Probably not. Although we’ll be sending more people to the moon in the future, the dangers of meteorite impacts, from the Sun, and mean this work will need to be done remotely. But controlling robots hundreds of thousands of kilometers away is also a challenge.

It’s not all bad news, though, as we can actually use some of these factors to our advantage.

The extreme vacuum of space can reduce the energy requirements of some processes, since a vacuum helps substances vaporize at lower temperatures (which you can test by trying to boil water on a tall mountain). A similar thing happens with molten rocks in space.

And while the moon’s lack of atmosphere makes it uninhabitable for humans, it also means more access to sunlight for and direct solar heating.

While it may take a few more years to get there, we’re well on our way to making things in space from metal. Astrometallurgists will be looking on with keen interest as future Artemis missions take off with the tools to make this happen.

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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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‘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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