adplus-dvertising
Connect with us

Science

Gut-Wrenching Photos Show Damage at Arecibo Observatory Following Collapse – Gizmodo

Published

 on


Aerial photo showing a massive gash in the radar dish and the receiving platform resting along the edge of the 1,000-foot-wide (305-meter) structure.
Image: Ricardo Arduengo/AFP via Getty Images (Getty Images)

As feared, the 900-ton instrument platform collapsed yesterday at the Arecibo Observatory in Puerto Rico, falling onto the gigantic radar dish below. Photos of the scene are revealing the extent of the damage at the famous facility, which is known for contributing to the search for extraterrestrial intelligence and numerous astronomical discoveries.

The collapse occurred at around 7:55 a.m. local time, as the receiving platform plunged 450 feet (140 meters) down to the 1,000-foot (305-meter) dish below, which had already been damaged in recent months by fallen cables. No injuries were reported, but the collapse has caused considerable damage to the radar dish and surrounding facilities, including a learning center, according to the U.S. National Science Foundation.

An aerial view of the Arecibo Observatory after the collapse on December 1, 2020.

An aerial view of the Arecibo Observatory after the collapse on December 1, 2020.
Image: Ricardo Arduengo/AFP via Getty Images (Getty Images)

The full extent of the damage is still being assessed. The area continues to be off limits to unauthorized personnel, while engineers are evaluating the stability of the remaining structures, such as the LIDAR facility used to study the upper atmosphere. Recovery teams are also currently working to mitigate potential environmental damage caused by the collapse. Here’s how the facility looked in 2019, before this year’s cable failures:

Arecibo Observatory in spring 2019, before the cable failures and collapse.

Arecibo Observatory in spring 2019, before the cable failures and collapse.
Photo: UCF Today

Aerial view showing extensive damage to the large radar dish, as well as the position of the fallen instrument platform. The collapse also ripped off the tops of the three support towers.

Aerial view showing extensive damage to the large radar dish, as well as the position of the fallen instrument platform. The collapse also ripped off the tops of the three support towers.
Image: Ricardo Arduengo/AFP via Getty Images (Getty Images)

“We knew this was a possibility, but it is still heartbreaking to see,” Elizabeth Klonoff, vice president for research at the University of Central Florida, which manages the facility for the NSF, told UCF Today.

The 900-ton instrument platform fell onto the dish below and can be seen lying on the side of the structure. It appears that the platform did not fall straight down but swung at an angle, which makes sense, given that a failed wire from one of the three support towers triggered the collapse.

A wide aerial view of the facility on December 1, 2020.

A wide aerial view of the facility on December 1, 2020.
Image: Ricardo Arduengo/AFP via Getty Images (Getty Images)

A preliminary assessment of the scene shows that the tops of all three platforms were sheared off as a result of the structural breakdown and that falling debris, including the support wires, landed outside the area of the dish. The learning center located near Tower 12 appears to have sustained “significant damage,” according to the NSF. That all three support towers are still standing is fortunate, as it was feared a collapse of the towers would damage buildings nearby.

Aerial view showing the fallen platform, Gregorian Dome, and support cables.

Aerial view showing the fallen platform, Gregorian Dome, and support cables.
Image: Ricardo Arduengo/AFP via Getty Images (Getty Images)

This is a particularly painful view of the damage, showing the mangled instrument platform, the busted Gregorian Dome (a multi-beam receiver capable of scanning multiple points in the sky at once), and the fallen support cables, which sliced through the dish like knives. The cause of the collapse is still under investigation, but as NSF officials pointed out during a press conference held on November 19, the cables did not perform as expected, possibly on account of exposure to excessive moisture. A forensic investigation of the cables is still ongoing, and we eagerly await the results.

Damage as seen on the ground.

Damage as seen on the ground.
Image: UCF Today

The view from the ground is not much better, showing the destruction in detail.

Aerial view of the Arecibo Observatory on December 1, 2020.

Aerial view of the Arecibo Observatory on December 1, 2020.
Image: Ricardo Arduengo/AFP via Getty Images (Getty Images)

The collapse of the instrument platform on December 1 was not a surprise. The famous radar dish was recently slated for controlled demolition following a series of cable failures. An auxiliary cable slipped from its socket in August, and a main cable snapped in early November due to the added strain. Engineers said the structure was at risk of imminent collapse and that it would be too dangerous for workers to attempt repairs. Monday’s unplanned collapse was not ideal, as officials were hoping to preserve scientific and educational infrastructure at the facility. Arecibo hosts 90,000 visitors each year.

Arecibo as it appeared on November 19, 2020. Previous cable failures caused the visible gashes in the dish.

Arecibo as it appeared on November 19, 2020. Previous cable failures caused the visible gashes in the dish.
Image: Ricardo Arduengo/AFP via Getty Images (Getty Images)

For context, here’s what the radar dish looked like on November 19, 2020, following two cable failures.

A motorcyclist drives by a road sign toward the Arecibo Observatory on December 1, 2020.

A motorcyclist drives by a road sign toward the Arecibo Observatory on December 1, 2020.
Image: Ricardo Arduengo/AFP via Getty Images (Getty Images)

Completed in 1963, the Arecibo Observatory contributed to a host of astronomical discoveries. The dish was used to detect the very first exoplanets and the first binary pulsar (which resulted in a Nobel Prize in physics), and it famously transmitted a message to aliens. The radio telescope was also used to study planets and nearby asteroids and to assist in the search for extraterrestrial intelligence (SETI). The loss of the dish is a major blow to the scientific community (particularly those working in Puerto Rico), as it was the second largest radio dish in the world. No word yet on whether the dish will ever be replaced, but it’s a conversation that’s already starting.

Let’s block ads! (Why?)

728x90x4

Source link

Continue Reading

News

Here’s how Helene and other storms dumped a whopping 40 trillion gallons of rain on the South

Published

 on

 

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. ”

___

Follow AP’s climate coverage at https://apnews.com/hub/climate

___

Follow Seth Borenstein on Twitter at @borenbears

___

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.

Source link

Continue Reading

Science

‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

Published

 on

 

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.

Source link

Continue Reading

News

The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

Published

 on

 

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.

Source link

Continue Reading

Trending