Microwaves are useful for more than just heating up leftovers. They can also make landing pads on other worlds – at least according to research released by a consortium of scientists at the University of Central Florida, Arizona State University, and Cislune, a private company. Their research shows how a combination of sorting the lunar soil and then blasting it with microwaves can create a landing pad for future rockets on the Moon – and save any surrounding buildings from being blasted by 10,000 kph dust particles.
This system works in large part because certain minerals on the lunar surface are magnetic, and those same minerals are also very susceptible to being heated up by microwaves. In particular, a type of glassy mineral called ilmenite, which makes up about 1-2% of the Moon’s surface, is highly magnetic.
Ilmenite forms when the Moon is blasted by small meteors and forms material called agglutinates. For older lunar soils (i.e., those that haven’t been recently blasted by a meteor), up to 60% of the soil is made up of these agglutinates, whereas only about 20% of “younger” lunar soils are. So concentrations are high enough in some places that contain significant amounts of older regolith.
So if future explorers wanted to make a landing pad, they could zap this older soil with strong microwaves to sinter it together and create a durable enough surface that would allow a rocket to land on it without sandblasting everything around. That sandblasting would be particularly wicked as there is no air to slow the dust particles down, as it would on Earth.
The solution seems simple enough – blast the soil with microwaves to sinter it together. However, systems can always be improved, and this microwave sintering process is no exception. The researchers found that, by subjecting the regolith to a process known as beneficiation, they could increase the amount of microwaves it absorbed and, therefore, the effectiveness of the heating process.
Beneficiation, in this case, involves sifting the soil and hitting it with a magnetic field, causing the more magnetic soil to move toward the magnet, whereas the non-magnetic soil would simply fall back to the ground. Dr. Phil Metzger, one of the lead authors of the study, compares the process to what recyclers do here on Earth – they sort material by its magnetic strength, allowing magnetic material, such as regular steel, to be separated from the more valuable stainless steel, which is not magnetic.
On the Moon, when the magnet is powered down, the magnetic soil would rest on top of the non-magnetic type. And since the magnetic soil is also much more susceptible to microwaves, the beneficiation process could increase the amount of energy the material absorbs by 60-80%.
That is an absurd improvement and one that could dramatically decrease the necessary size of the microwave power supply needed for such a mission. Given the weight of some microwave power supplies, any reduction in its heft could dramatically decrease the cost of the overall program.
The paper also looks at other potential landing pad creation methodologies, including polymer-based by paver-based pads. However, the cost-effectiveness of using in-situ resources, such as those in the microwave sintering project, is the most effective at the current price point of getting equipment into orbit.
While that price might fall significantly in the coming decades, this technique seems like one of the best for the Artemis mission planners that are hoping to land a reusable rocket on the Moon sometime again this decade. For now, the next research steps would include testing the microwave power source and doing similar tests on the soil in a simulated lunar environment, including in a vacuum. If some microwaved meals are anything to go by, it might not be the best idea to smell the resulting material though.
Artist’s depiction of a Moon base.
Credit – NASA
Kemptville author's book being sent to the moon – CBC.ca
An author from North Grenville, Ont., is going to be part of a small club of authors whose works will be sent to the moon.
Michael Blouin of Kemptville says he’s been interested in space travel since the Apollo 11 mission that landed humans on the moon for the first time.
To be part of a group of hundreds of authors having their work immortalized within the vast expanse of space has him “gobsmacked.”
“I take comfort in the fact that no matter what happens, it looks like my books … will survive and be there,” he said.
“I sometimes wake up at night and say ‘Oh yeah, I’m going to the moon. Wow.’ It’s kind of amazing.”
How it came to be
Blouin said he’s been a lifelong fan of NASA and space exploration, so when the opportunity to get his work in the Writers on the Moon project came up, he had to take it.
Then around the deadline to apply, his house burned down.
Amid the chaos of not having anywhere to live and then moving into his son’s house, he realized he’d missed his chance.
“I had missed the deadline to apply for this program for books to go to the moon by 12 hours and I was just kicking myself,” he said.
“I lost everything and now I’d missed out on my chance to do something I’d always dreamed about doing.”
Luckily a friend and author in Newfoundland, Carolyn R. Parsons, said she had managed to get some of her work included in the project and had enough space on her microdisk to include him as well.
When do the books go?
The NASA launch is scheduled for Feb. 25 at Cape Canaveral in Florida, which will see his book Skin House brought to the stars along with other works of independent fiction.
Blouin is getting the chance to see the launch.
“These launches sometimes get delayed due to technical reasons or due to weather,” he said.
“But I’m hoping to give myself a big enough window that I’ll actually be on site.”
Blouin had some advice for people who aspire to write or create.
“Any young person aspiring in the arts just shouldn’t give up. Keep trying,” he said. “It can be a tough go but it’s worth every moment.”
He’s getting another of his books — I am Billy the Kid — up to the moon in 2024.
Green comet zooming our way, last visited 50,000 years ago – Cochrane Today
CAPE CANAVERAL, Fla. (AP) — A comet is streaking back our way after 50,000 years.
The dirty snowball last visited during Neanderthal times, according to NASA. It will come within 26 million miles (42 million kilometers) of Earth Wednesday before speeding away again, unlikely to return for millions of years.
So do look up, contrary to the title of the killer-comet movie “Don’t Look Up.”
Discovered less than a year ago, this harmless green comet already is visible in the northern night sky with binoculars and small telescopes, and possibly the naked eye in the darkest corners of the Northern Hemisphere. It’s expected to brighten as it draws closer and rises higher over the horizon through the end of January, best seen in the predawn hours. By Feb. 10, it will be near Mars, a good landmark.
Skygazers in the Southern Hemisphere will have to wait until next month for a glimpse.
While plenty of comets have graced the sky over the past year, “this one seems probably a little bit bigger and therefore a little bit brighter and it’s coming a little bit closer to the Earth’s orbit,” said NASA’s comet and asteroid-tracking guru, Paul Chodas.
Green from all the carbon in the gas cloud, or coma, surrounding the nucleus, this long-period comet was discovered last March by astronomers using the Zwicky Transient Facility, a wide field camera at Caltech’s Palomar Observatory. That explains its official, cumbersome name: comet C/2022 E3 (ZTF).
On Wednesday, it will hurtle between the orbits of Earth and Mars at a relative speed of 128,500 mph (207,000 kilometers). Its nucleus is thought to be about a mile (1.6 kilometers) across, with its tails extending millions of miles (kilometers).
The comet isn’t expected to be nearly as bright as Neowise in 2020, or Hale-Bopp and Hyakutake in the mid to late 1990s.
But “it will be bright by virtue of its close Earth passage … which allows scientists to do more experiments and the public to be able to see a beautiful comet,” University of Hawaii astronomer Karen Meech said in an email.
Scientists are confident in their orbital calculations putting the comet’s last swing through the solar system’s planetary neighborhood at 50,000 years ago. But they don’t know how close it came to Earth or whether it was even visible to the Neanderthals, said Chodas, director of the Center for Near Earth Object Studies at NASA’s Jet Propulsion Laboratory in California.
When it returns, though, is tougher to judge.
Every time the comet skirts the sun and planets, their gravitational tugs alter the iceball’s path ever so slightly, leading to major course changes over time. Another wild card: jets of dust and gas streaming off the comet as it heats up near the sun.
“We don’t really know exactly how much they are pushing this comet around,” Chodas said.
The comet — a time capsule from the emerging solar system 4.5 billion years ago — came from what’s known as the Oort Cloud well beyond Pluto. This deep-freeze haven for comets is believed to stretch more than one-quarter of the way to the next star.
While comet ZTF originated in our solar system, we can’t be sure it will stay there, Chodas said. If it gets booted out of the solar system, it will never return, he added.
Don’t fret if you miss it.
“In the comet business, you just wait for the next one because there are dozens of these,” Chodas said. “And the next one might be bigger, might be brighter, might be closer.”
The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Science and Educational Media Group. The AP is solely responsible for all content.
Marcia Dunn, The Associated Press
How to spot the planets hiding in plain sight – CBC.ca
This video was produced by Trevor Kjorlien as part of the CBC Creator Network. Learn more about the Creator Network here.
Most people are aware that if you live in the city, light pollution limits your view of the night sky. If you want to see lots of stars, comets and the Milky Way, you have to get out into the countryside, where the sky is dark.
However noble the cause, awareness campaigns to educate people about light pollution have had an unintended side effect: people think you can’t see anything in the urban night sky except a handful of bright stars and the moon.
So if you are a city dweller and you don’t look up, what are you missing out on?
Even in the most light-polluted skies, we can see five planets with the naked eye: Mercury, Venus, Mars, Jupiter and Saturn.
How to find the planets
It’s not unusual to be able to see the planets. Normally, some appear in the evening and some in the morning, depending on where they are in their orbit around the sun.
How do you know when and where to look?
In June 2022, we had a rare opportunity: all the naked-eye planets were visible in the early morning. At dawn, you could see all five of them lined up before the sun rose and washed their light away.
Why did they appear to line up, as they did then?
The sun rises in the east and sets in the west. In the northern hemisphere, the sun appears to move through the sky in the south.
Now imagine a line was drawn out behind the sun as it travels in the sky through the day. Astronomers call this “the path of the ecliptic.”
At night, you can roughly follow this imaginary line, and that’s where the planets can be found. This is because the planets all orbit the Sun on the same plane, much like a frisbee or a vinyl record. Because all the planets travel more or less on the same plane, from our view on Earth, they appear to line up and are always visible in the southern sky from the northern hemisphere.
Embedded in our daily lives
We can see seven significant celestial objects with the naked eye: the sun, the moon and the five planets closest to the sun.
Where else do we see the number seven in our day-to-day lives?
In the calendar.
Through the magic of myth and etymology, each day of the week corresponds to these celestial objects.
- Monday is moon day, named for the moon. (In French, la lune becomes lundi.)
- Tuesday, named for Tiw, the Germanic god of war, corresponds to the Roman war god Mars (in French, mardi).
- Wednesday is named for Woden, the Germanic god corresponding to the Roman god Mercury (in French, mercredi).
- Thursday is named for Thor, the Norse god corresponding to the Roman god Jupiter. (In French, from the Latin Jovis, a name for Jupiter, we get jeudi.)
- Friday is named for Frigga, the Germanic goddess corresponding to the Roman goddess of love, Venus (in French, vendredi).
- Saturday is named for Saturn.
- Sunday is named for the sun.
Think about which day you’re reading this. Which celestial object does it correspond to?
Not only are the planets hiding in plain sight in the urban night sky, they’re hiding in our calendars — embedded in our daily lives.
The Creator Network, which works with emerging visual storytellers to bring their stories to CBC platforms, produced the piece. If you have an idea for the Creator Network, you can send your pitch here.
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