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Canadian researcher discovers planet covered in volcanoes

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Around 90 light years away from our solar system is an exoplanet covered in volcanoes, around the same size as the Earth and potentially able to support life.

And it’s the discovery of Canadian astronomers.

“We were super excited about this,” Björn Benneke, head of the astronomy division within the department of physics at the University of Montreal, told CTV National News.

He said when his team discovered the planet, they all felt a thrill over having a discovery no one else knew about yet.

“My students and I were the only ones in the world that knew about this extra Earth that is out there that is potentially a game changer for how we understand these planets, or understand the solar system, so that was a huge moment.”

Exoplanet is the term for a planet that exists in solar systems outside of our own. Scientists have been increasingly searching for exoplanets that may be able to support life for years, but it’s still rare to find ones that fall within certain parameters.

“What is particularly exciting about these Earth-size planets, about these temperate planets where temperatures are quite similar to the Earth, is those are the ones where we will look for life in the future, so this one here — it’s a potential candidate for this,” Benneke said.

Some of the key factors astronomers look for are planets of a similar size to Earth that orbit their star at a distance not too far away and not too close — within the “habitable zone” of temperature that could allow for liquid water to form on the surface of the planet.

This new planet hits those markers, but also comes with some unique properties that are making scientists excited.

Benneke’s team is dedicated to searching for Earth-like exoplanets and mapping the diversity of their atmospheres and makeups.

They found the new planet using NASA’s “TESS” — Transiting Exoplanet Survey Satellite.

How it works is that as a planet passes in front of its star, it blocks some of the light, causing a slight drop in brightness. TESS is able to spot these dips in light and map out planet transits to confirm the presence of a planet.

The team also used data from the retired Spitzer Space Telescope to discover the planet could possibly support life.

“It has some properties that are very, very similar to Earth. It’s the same size, it’s a similar mass, in terms of temperatures, relatively comparable, at least globally,” Benneke said. “But there are also quite some differences.”

One of those differences is that this planet, which orbits a much smaller star than ours, doesn’t revolve the way Earth does — instead it is locked in its orbit around its star, similar to the way the moon orbits the Earth.

“This means the same side of the planet always faces towards the star,” Benneke said. “It’s a permanent day side.”

The planet is officially designated as LP 791-18d, but it has another name: Reykjavik, after the capital of Iceland.

The nickname comes from the team’s theories about the makeup of the planet.

They believe it could undergo volcanic outbursts as often as Jupiter’s moon Io, the most volcanically active body in our solar system.

“Volcanoes are exciting because they bring things to the surface of the planet that might bring the building blocks of life,” Dan Riskin, CTV’s Science and Technology Specialist, told CTV National News. “So any time there’s a volcano, people get excited.”

How do scientists know that this planet is likely to have significant volcanic activity? Because they’ve been studying this system for a while.

LP 791-18d is not the only planet that orbits this particular dwarf star. Two other planets were previously discovered by TESS in 2019, known as LP 791-18 b and c.

This new planet orbits in between the two, at an intermediate distance from the star, with Planet c — which is about 2.5 times bigger than Earth — orbiting the farthest from the star. When tracking the movements of these planets, however, astronomers realized that Planet c was passing very closely to the new planet, so closely that the larger planet’s gravity is definitely impacting the smaller one.

Every time the larger planet passes close to LP 791-18d, it pulls on the smaller planet, deforming it slightly in a process called tidal heating.

“The significant friction generated by tidal heating in the planet is responsible for heating its interior to a considerable extent, ultimately enabling the existence of a subsurface magma ocean,” Caroline Piaulet, a UdeM Ph.D. student who was involved in the discovery, said in a press release. “In our Solar System, we know that Jupiter’s moon Io is affected by Jupiter and its other moons in a similar way, and that world is the most volcanic we know.”

The permanent night side of the planet is where astronomers believe that water may be able to form. With ice, water and volcanoes, researchers picture it like Iceland — hence the nickname.

While TESS continues to look for signs of planets, new worlds or exoplanets, the team is hoping that they can get a closer look at this new exoplanet in particular through the James Webb telescope, the largest and most advanced telescope ever built.

“Once James Webb turns its attention to it, we’re going to have a much better view,” Riskin said. “Right now, it’s a lot of theoretical stuff about what might be there and we’re going to have a close look soon with that new telescope and it’s going to make it all worthwhile.”

Because the planet’s star is so small — only a little bit bigger than Jupiter — researchers believe that the James Webb telescope should be able to actually see the planet’s atmosphere.

Scientists have already secured observing time with the James Webb telescope for the larger planet, Planet c, which will shed more light on the system.

“Everyone thinks of NASA when they think of space science, but here you have Canadian researchers, a Canadian university,” Riskin said. “And ultimately, it’s that James Webb telescope, which is partly Canadian, that’s going to have a closer look. So Canada has a lot to be proud about.”

 

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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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