The Lunar Gateway is No Longer a Required Part of the Artemis Mission to Return to the Moon by 2024 - Universe Today | Canada News Media
Connect with us

Science

The Lunar Gateway is No Longer a Required Part of the Artemis Mission to Return to the Moon by 2024 – Universe Today

Published

 on


In 2010, President Barack Obama signed the NASA Authorization Act, which charged NASA with developing all the necessary technologies and components to allow for a crewed mission to Mars. Key to this was the development of the Space Launch System (SLS), the Orion spacecraft, and an orbiting lunar habitat (aka. the Lunar Gateway).

However, in recent years, these plans have been altered considerably to prioritize “returning to the Moon.” Formally named Project Artemis, VP Pence emphasized in March of 2019 that NASA must return to the Moon by 2024, even if it meant some shakeups were needed. In the latest news, NASA has indicated that the Lunar Gateway is no longer a priority, as part of a plan to “de-risk” the mandatory tasks associated with Artemis.

These sentiments were expressed by Doug Loverro, who replaced William Gerstenmaier in July of 2019 as part of a shakeup designed to expedite progress with the SLS and the Artemis program in general. As Loverro explained during a NASA Advisory Council science committee (held on Friday, March 13th), he has been working to “de-risk” Artemis so NASA can focus on meeting the mandatory goals of Artemis and its 2024 deadline.

[embedded content]

As Lovarro explained, this means focusing on technologies and activities that NASA already has experience developing. He also stated that those risks that can’t be eliminated need to be “burned down”. All of this is essential, he claimed, to creating the necessary mission architecture to land astronauts on the Moon by 2024. As he summarized:

“What are we going to do to go ahead and make that happen? And the answer is you’ve got to go ahead and remove all the things that add to program risk along the way.

What are all of the risks that can get in our way in a four-and-a-half-year schedule and how do we go ahead and pull them all early into program, or eliminate them from the program altogether by going ahead and making wise technical or programmatic choices?”

For this reason, he said during the latter half of the session, the Lunar Gateway had to be removed as a critical element to the program. This comes on the heels of what Associate Administrator Steve Jurczyk announced back in February at the LSIC’s kickoff meeting. It was here that Jurczyk explained that the first mission (Artemis 1) would likely be delayed and would take place in “mid to late” 2021.

[embedded content]

Another reason cited by Lovarro for the decision was the likelihood that the Gateway will fall behind in its development schedule. This he attributed to the fact that the first module, the Power and Propulsion Element (PPE), calls for an advanced solar-electric propulsion system that will allow it to act as a sort of “space tug” for visiting spacecraft while also serving as the command and communications center of the Gateway.

In May of 2019, NASA announced that it had awarded a $375 million contract to Colorado-based aerospace company Maxar Technologies (formerly SSL) to develop the PPE. The design called for a 50-kilowatt solar electric propulsion (SEP) spacecraft that will serve as a mobile command and service module and communications relay for human and robotic expeditions to the lunar surface.

Originally, NASA hoped to have this module ready by 2022 so that it could be launched as part of the Artemis 2 mission. The creation of other elements – like the HAbitation and Logistics Outpost (HALO), the ESPRIT service module, and the International Habitation Module (iHAB) – were also recently contracted to Northrop Grumman Innovation Systems (NGIS) and Airbus and OHB, respectively.

But as we reported in a previous article, since March of 2019, there have been concerns at NASA that the expedited timeline could come at the cost of sacrificing the Lunar Gateway. As an inside source reported at the time, there had been apparent pushback from the White House Office of Management and Budget (OMB) over continued funding for an element they considered unnecessary.

Artist’s impression of the Lunar Gateway. Credit: NASA

Of course, Loverro emphasized that NASA was not abandoning the Lunar Gateway and that removing it from the “critical path” would lead to a better Gateway program. For one, it will give NASA contractors more time to develop their modules, which were originally scheduled for completion beginning in 2026. Second, it will cut the associated costs for Project Artemis. As he said:

“We can now tell them 100% positively it will be there because we’ve changed that program to a much more what I would call solid, accomplishable schedule… Frankly, had we not done that simplification, I was going to have to cancel Gateway because I couldn’t afford it. By simplifying it and taking it out of the critical path, I can now keep it on track.”

This means that the Artemis missions will no longer rely on the Gateway and will instead use a lunar lander incorporated into the Orion spacecraft. Here too, Loverro hinted that there would be changes in order to cut costs and reduce risks. Previously, NASA had proposed a reusable three-stage lander consisting of an ascent module, descent module, and transfer module – all of which would be assembled at the Gateway.

Instead, Loverro proposed taking the time-tested and proven approach. This likely means that the Artemis lander will be a two-stage spacecraft, like the lunar module that took the Apollo astronauts to the Moon, consisting of a descent stage and an ascent stage. In Sept. of 2019, when NASA announced the decision to fast-track the development of the lunar lander, contractors were given the option of suggesting non-reusable alternatives as well.

Artist’s concept of a possible Project Artemis lunar lander. Credit: NASA

“Program risk is driven by which things haven’t you done in space before that you would now have to do in this mission,” said Loverro. “We’ve never done that before, so we’d like to try to avoid doing things we’ve never done before.” In the meantime, the finalized plan for Artemis is expected in the near future, though Loverro could not provide a more concrete idea of when it would be unveiled.

In effect, this means that Artemis will be a “boots and flags” operation like the Apollo missions, something that NASA was originally hoping to avoid. On top of that, there have been severely mixed messages coming from this administration. Whereas VP Pence has remained resolute in his stated commitment to Artemis, President Trump has publicly criticized the project for retreading on old ground.

“NASA should NOT be talking about going to the Moon – We did that 50 years ago. They should be focused on the much bigger things we are doing, including Mars…” he tweeted on June 7th, 2019. This was followed by similar statements made in September during the visit of Australian PM Scott Morrison, where he stated to press that were in attendance:

“We’re going to Mars. We’re stopping at the moon. The moon is actually a launching pad. That’s why we’re stopping at the moon. I said, ‘Hey, we’ve done the moon. That’s not so exciting.’ So we’ll be doing the moon. But we’ll really be doing Mars.”

Artist’s impression of the SLS taking off. Credit: NASA

Still, all signs point toward NASA still being committed to establishing a “sustainable lunar exploration” program on the Moon, which is intended to include the creation of a permanent lunar outpost. Examples of this include the ESA’s proposed International Moon Village and China’s plan for building an outpost in the South Pole-Aitken Basin.

Nevertheless, the decision to make a lunar landing happen by 2024 “by any means necessary” (not to mention conflicting statements from the White House) has caused its fair share of confusion and chaos around NASA. With the “Moon to Mars” framework, the creation of the Lunar Gateway and a crewed mission to the lunar surface by 2028 were interdependent.

But if there’s one thing that space exploration has taught us, it is that budgets and priorities change regularly, which is why it is important to be flexible and adapt. One way or another, we’re going back to the Moon and we intend to stay there! The means to do so may just take a little longer than expected.

Further Reading: Space News

Let’s block ads! (Why?)



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

Exit mobile version