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A Chinese Telescope Did Not Find an Alien Signal. The Search Continues. – The New York Times

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China’s astronomers have been initiated into the search for extraterrestrial intelligence with the kind of false alarm that others in the field have experienced for decades.

It was a project that launched a thousand interstellar dreams.

Fifty years ago, NASA published a fat, 253-page book titled, “Project Cyclops.” It summarized the results of a NASA workshop on how to detect alien civilizations. What was needed, the assembled group of astronomers, engineers and biologists concluded, was Cyclops, a vast array of radio telescopes with as many as a thousand 100-meter-diameter antennas. At the time, the project would have cost $10 billion. It could, the astronomers said, detect alien signals from as far away as 1,000 light-years.

The report kicked off with a quotation from the astronomer Frank Drake, now an emeritus professor at the University of California, Santa Cruz:

At this very minute, with almost absolute certainty, radio waves sent forth by other intelligent civilizations are falling on the earth. A telescope can be built that, pointed in the right place and tuned to the right frequency, could discover these waves. Someday, from somewhere out among the stars, will come the answers to many of the oldest, most important and most exciting questions mankind has asked.

The Cyclops report, long out of print but available online, would become a bible for a generation of astronomers drawn to the dream that science could answer existential questions.

“For the very first time, we had technology where we could do an experiment instead of asking priests and philosophers,” Jill Tarter, who read the report when she was a graduate student and who has devoted her life to the search for extraterrestrial intelligence, said in an interview a decade ago.

NASA

I was reminded of Cyclops and the work it inspired this week when word flashed around the world that Chinese astronomers had detected a radio signal that had the characteristics of being from an extraterrestrial civilization — namely, it had a very narrow bandwidth at a frequency of 140.604 MHz, a precision nature doesn’t usually achieve on its own.

They made the detection using a giant new telescope called the Five-hundred-meter Aperture Spherical radio Telescope, or FAST. The telescope was pointed in the direction of an exoplanet named Kepler 438 b, a rocky planet about 1.5 times the size of Earth that orbits in the so-called habitable zone of Kepler 438, a red dwarf star hundreds of light years from here, in the constellation Lyra. It has an estimated surface temperature of 37 degrees Fahrenheit, making it a candidate to harbor life.

Just as quickly, however, an article in the state-run newspaper “Science and Technology Daily” reporting the discovery vanished. And Chinese astronomers were pouring cold water on the result.

Zhang Tong-jie, the chief scientist of China ET Civilization Research Group, was quoted by Andrew Jones, a journalist who tracks Chinese space and astronomy developments, as saying, “The possibility that the suspicious signal is some kind of radio interference is also very high, and it needs to be further confirmed or ruled out. This may be a long process.”

Dan Werthimer, of the University of California, Berkeley, who is among the authors of a scientific paper on the signal, was more blunt.

Dr. Seth Shostak/Science Source

“These signals are from radio interference; they are due to radio pollution from earthlings, not from E.T.,” he wrote in an email.

This has become a familiar story. For half a century, SETI, or the search for extraterrestrial intelligence, has been a game of whack-a-mole, finding promising signals before tracking them down to orbiting satellites, microwave ovens and other earthly sources. Dr. Drake himself pointed a radio telescope at a pair of stars in 1960 and soon thought he had struck gold, only to find out the signal was a stray radar.

More recently, a signal that appeared to be coming from the direction of the sun’s closest stellar neighbor, Proxima Centauri, was tracked down to radio interference in Australia.

Just as NASA’s announcement last week that it would make a modest investment in the scientific study of unidentified flying objects was intended to bring rigor and practicality to what many criticized as wishful thinking, so, too, was the agency’s Cyclops workshop held at Stanford over three months in 1971. The conference was organized by John Billingham, an astrobiologist, and Bernard Oliver, who was the head of research for Hewlett-Packard. The men also edited the conference’s report.

In the introduction, Dr. Oliver wrote that if anything came of Cyclops he would consider this the most important year of his life.

“Cyclops was, indeed, a milestone, largely in pulling together a coherent SETI strategy, and the clear calculations and engineering design that followed,” said Paul Horowitz, an emeritus professor of physics at Harvard who went on to design and start his own listening campaign called Project Meta, funded by the Planetary Society. The movie director Steven Spielberg (“E.T.” and “Close Encounters of the Third Kind”) attended the official opening in 1985 at the Harvard-Smithsonian Agassiz Station in Harvard, Mass.

“SETI was for real!” Dr. Horowitz added.

But what Dr. Oliver initially received was only a “Golden Fleece” award from Senator William Proxmire, Democrat of Wisconsin, who crusaded against what he considered government waste.

“In my view, this project should be postponed for a few million light years,” he said.

On Columbus Day in 1992, NASA did initiate a limited search; a year later, Congress canceled it at the behest of Senator Richard Bryan, Democrat of Nevada. Denied federal support ever since, the SETI endeavor has limped along, supported by donations to a nonprofit organization, the SETI Institute, in Mountain View, Calif. Recently, through a $100 million grant, the Russian entrepreneur Yuri Milner set up a new effort called Breakthrough Listen. Dr. Horowitz and others have expanded the search to what they call “Optical SETI,” monitoring the sky for laser flashes from distant civilizations.

Cyclops was never built, which is just as well, Dr. Horowitz said, “because, by today’s standards, it would have been an expensive hulking monster.” Technological developments like radio receivers that can listen to billions of radio frequencies at once have changed the game.

Xinhua News Agency / Contributor

China’s big new FAST telescope, also nicknamed “Sky Eye,” was built in 2016 partly with SETI in mind. Its antenna occupies a sinkhole in Guizhou in Southwest China. The size of the antenna eclipses what was the iconic Arecibo radio telescope in Puerto Rico, which collapsed ignominiously in December 2020.

Now FAST and its observers have experienced their own trial by false alarm. There will be many more, SETI astronomers say.

The generation of astronomers who were inspired by the Cyclops report is getting old. Dr. Billingham died in 2013. Dr. Oliver died in 1995. Dr. Tarter retired from the SETI Institute in 2012, proud that she had never sounded a false alarm.

Those who endure profess not to be discouraged by the Great Silence, as it is called, from out there. They’ve always been in the search for the long run, they say.

“The Great Silence is hardly unexpected,” said Dr. Horowitz, including because only a fraction of a percent of the 200 million stars in the Milky Way have been surveyed. Nobody ever said that detecting that rain of alien radio signals would be easy.

“It might not happen in my lifetime, but it will happen,” Dr. Werthimer said.

“All of the signals detected by SETI researchers so far are made by our own civilization, not another civilization,” Dr. Werthimer grumbled in a series of emails and telephone conversations. Earthlings, he said, might have to build a telescope on the backside of the moon to escape the growing radio pollution on Earth and the interference from constellations of satellites in orbit.

The present time, he said, might be a unique window in which to pursue SETI from Earth.

“One hundred years ago, the sky was clear, but we didn’t know what to do,” he said. “One hundred years from now, there will be no sky left.”

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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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