adplus-dvertising
Connect with us

Science

NASA releases new ‘Penguin and Egg’ image from James Webb Space Telescope

Published

 on

NASA has released a stunning new image from the James Webb Space Telescope (JWST) marking the two-year anniversary of the release of its first images. And the space agency is calling it the “Penguin and Egg.”

What exactly are we looking at? Well, it’s two interacting galaxies known jointly as Arp 142 that lie 326 million light-years from Earth.

They are 100,000 light-years apart, which may sound far, but in astronomical terms, that’s very close. In contrast, our Milky Way and the closest major galaxy to us — the Andromeda galaxy — are separated by 2.5 million light years.

The Penguin and Egg galaxies made their first pass some time between 25 and 75 million years ago, NASA said in a release. This, in turned, triggered a new star formation in the Penguin.

Galactic mergers can cause galaxies to form thousands of new stars a year over millions of years. In the case of the Penguin, NASA said, research suggests that about 100 to 200 new stars have formed each year. This is many times more than what is happening in our own galaxy, where only roughly six to seven new stars form each year.

Webb’s mid-infrared view of interacting galaxies Arp 142. This image was taken by MIRI, the telescope’s mid-infrared instrument, which astronomers use to study cooler and older objects, dust, and extremely distant galaxies. (NASA, ESA, CSA, STScI)

Before the galactic interaction, the Penguin was a spiral galaxy. Now, the centre forms the “eye” of the Penguin. The Egg, on the other hand, is an elliptical galaxy, which contains much older stars.

At the top right of the image is the PGC 1237172 galaxy, which is 100 million light-years closer to Earth, according to a release by the Space Telescope Science Institute in Baltimore, Md.

And, of course, in the background lie thousands more galaxies.

The gift that keeps on giving

JWST is the successor to the Hubble Space Telescope.

Unlike Hubble’s one mirror, JWST has 18 individual mirrors that make up for one giant one. That makes it a light-catching machine, allowing it see some of the faintest objects and to peer far back into the earliest times of the universe.

That’s why astronomers were so excited when this game-changing telescope was launched on Dec. 25, 2021. It was a Christmas gift headed to orbit around the moon, just waiting to be unwrapped.

The first image released blew astronomers away.

The blackness of space is dotted with bright stars and galaxies.
The first image released by the James Webb Space Telescope shows thousands of galaxies. (NASA)

It was the telescopes’s first wide-field image, which provided the sharpest and deepest infrared image of thousands of galaxies.

And JWST is the gift that keeps on giving, particularly to astronomers looking to better understand our universe and how we got here.

The telescope, with its massive light-collecting capability, is changing the way astronomers look at our universe. Its observations have challenged the idea of how stars form and even how fast the universe is expanding.

The view from inside the Milky Way galaxy looks crowded with so many stars on a black background in a colourful spectrum, from cyan to magenta.
This image from the James Webb Space Telescope reveals a 50 light-years-wide portion of the Milky Way’s dense centre. An estimated 500,000 stars shine in this image of the Sagittarius C (Sgr C) region, along with some as-yet unidentified features. (Samuel Crowe/UVA/STScI/NASA/ESA/CSA/NASA/ESA/CSA)

“[I’m] incredibly, incredibly grateful because the pictures that we are able to see now … it was not something that we thought we will be able to see,” said Lamiya Mowla an assistant professor at Wellesley University in Wellesley, Mass.

She is one of several scientists who are part of the Canadian NIRISS Unbiased Cluster Survey (CANUCS).

“[Previously,] we were talking about that we will be able to resolve things down to … hundreds of light years or so, down to that level in a very, very early universe. Now, we can see that we can almost get down to tens of light years.”

Data on exoplanets a ‘game changer’

And while we don’t get the jaw-dropping images from Webb when it comes to the study of exoplanets — planets orbiting other stars — its data is proving to be incredibly helpful in understanding planetary atmospheres, especially larger planets that are more similar to our outer planets, such as Jupiter and Neptune.

“If you look at other planets like hot Jupiters, or even colder, like Neptune, or Neptune-sized planets that are a bit colder … James Webb is really a game changer,” said Olivia Lim, a PhD student at the Université de Montréal and member of the Trottier Institute for Research of Exoplanets, who’s main area of focus is the seven-exoplanet system known as TRAPPIST-1.

“People are able to measure things that we weren’t able to measure before or they’re they’re able to do it with so much more precision.”

And, of course, the telescope has also provided images of phenomena closer to home, such as a jaw-dropping image of Uranus and its rings.

A ringed planet hangs in the blackness of space with stars and galaxies scattered around it.
This image of Uranus from NIRCam (near-infrared camera) on NASA’s James Webb Space Telescope shows the planet and its rings in new clarity. (NASA, ESA, CSA, STScI)

Mowla said that she’s incredibly grateful for JWST and what it can tell us about our own origins.

“The things that we are seeing over here is what it has taken the universe to get us to the point that we are at today, the world that we take for granted. It has spent 13.7 billion years to build this perfect Earth,” she said.

“I’m pretty sure there are habitable planets in every galaxy. We just haven’t found them yet.”

 

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