Science & Environment
NASA outlines backup plan to get Starliner crew back to Earth from International Space Station if Boeing ship can’t bring them home
As NASA debates the safety of Boeing’s Starliner spacecraft in the wake of multiple helium leaks and thruster issues, the agency is “getting more serious” about a backup plan to bring the ship’s two crew members back to Earth aboard a SpaceX Crew Dragon, officials said Wednesday.
In that case — and no final decisions have been made — Starliner commander Barry “Butch” Wilmore and co-pilot Sunita Williams would remain aboard the International Space Station for another six months and come down on a Crew Dragon that’s scheduled for launch Sept. 24 to carry long-duration crew members to the outpost.
Two of the four “Crew 9” astronauts already assigned to the Crew Dragon flight would be bumped from the mission and the ship would be launched with two empty seats. Wilmore and Williams then would return to Earth next February with the two Crew 9 astronauts.
Shortly before the Crew Dragon launch, the Starliner would undock from the station’s forward port and return to Earth under computer control, without any astronauts aboard. The Crew Dragon then would dock at the vacated forward port.
Two earlier Starliner test flights were flown without crews and both landed successfully. The current Starliner’s computer system would need to be updated with fresh data files, and flight controllers would need to brush up on the procedures, but that work can be done in time to support a mid September return.
If that scenario plays out, Wilmore and Williams would end up spending 268 days — 8.8 months — in space instead of the week or so they planned when they blasted off atop a United Launch Alliance Atlas 5 rocket on June 5.
Based on uncertainty about the precise cause of the thruster problems, “I would say that our chances of an uncrewed Starliner return have increased a little bit based on where things have gone over the last week or two,” said Ken Bowersox, NASA’s director of space operations.
“That’s why we’re looking more closely at that option to make sure that we can handle it.”
But he cautioned that no final decisions will be made on when — or how — to bring the Starliner crew home until the agency completes a top-level flight readiness review.
No date has been set, but it could happen by late next week or the week after.
“Our prime option is to return Butch and Suni on Starliner,” said Steve Stich, manager of NASA’s Commercial Crew Program. “However, we have done the requisite planning to make sure we have other options open. We have been working with SpaceX to ensure that they’re ready to (return) Butch and Suni on Crew 9 if we need that.
“Now, we haven’t approved this plan (yet). We’ve done all the work to make sure this plan is there … but we have not turned that on formally. We wanted to make sure we had all that flexibility in place.”
Before the Starliner was launched, NASA and Boeing engineers knew about a small helium leak in the spacecraft’s propulsion system. After ground tests and analysis, the team concluded the ship could be safely launched as is.
The day after launch, however, four more helium leaks developed and five aft-facing maneuvering thrusters failed to operate as expected. Ever since, NASA and Boeing have been carrying out data reviews and ground tests in an effort to understand exactly what caused both issues.
The Starliner uses pressurized helium to push propellants to the thrusters, which are critical to keeping the spacecraft properly oriented. That’s especially important during the de-orbit braking “burn” using larger rocket engines to slow the ship down for re-entry and an on-target landing.
To clear the Starliner for a piloted return to Earth, engineers must develop acceptable “flight rationale” based on test data and analyses that provides confidence the ship can make it through re-entry and landing with the required level of safety.
“The Boeing team (is) very confident that the vehicle could bring the crew home right now with the uncertainty we’ve got,” said Bowersox. “But we’ve got other folks that are probably a little more conservative. They’re worried that we don’t know for sure, so they estimate the risk higher and they would recommend that that we avoid coming home (on Starliner) because we have another option.
“So that’s a part of the discussion that we’re having right now. But again, I think both views are reasonable with the uncertainty band that we’ve got, and so our effort is trying to reduce that uncertainty.”
Boeing adamantly argues the Crew Dragon backup plan isn’t needed and that tests and analyses of helium leaks in the Starliner’s propulsion system and initial trouble with maneuvering thrusters show the spacecraft has more than enough margin to bring Wilmore and Williams safely back to Earth.
The helium leaks are understood, Boeing says, they have not gotten worse and more than enough of the pressurized gas is on board to push propellants to the thrusters needed to maneuver and stabilize the spacecraft through the critical de-orbit braking burn to drop out of orbit for re-entry and landing.
Likewise, engineers believe they now understand what caused a handful of aft-facing maneuvering jets to overheat and fire at lower-than-expected thrust during rendezvous with the space station, causing the Starliner’s flight computer to shut them down during approach.
Ground tests of a new Starliner thruster, fired hundreds of times under conditions that mimicked what those aboard the spacecraft experienced, replicated the overheating signature, which was likely caused by multiple firings during tests of the capsule’s manual control system during extended exposure to direct sunlight.
The higher-than-expected heating likely caused small seals in thruster valve “poppets” to deform and expand, the analysis indicates, which reduced the flow of propellant. The thrusters aboard the Starliner were test fired in space under more normal conditions and all operated properly, indicating the seals had returned to a less intrusive shape.
New procedures are in place to prevent the overheating that occurred during the rendezvous. Additional manual test firings have been ruled out, no extended exposure to the sun is planned and less frequent firings are required for station departure compared to rendezvous.
In a statement Wednesday, Boeing said, “We still believe in Starliner’s capability and its flight rationale. If NASA decides to change the mission, we will take the actions necessary to configure Starliner for an uncrewed return.”
The helium plumbing and thrusters are housed in the Starliner’s service module, which will be jettisoned to burn up in the atmosphere before the crew capsule re-enters for landing. As such, engineers will never be able to examine the hardware first hand to prove, with certainty, what went wrong.
At this point, that uncertainty appears to support bringing Wilmore and Williams back to Earth aboard the Crew Dragon. But it’s not yet a certainty.
“If we could replicate the physics in some offline testing to understand why this poppet is heating up and extruding and then why it’s contracting, that would give us additional confidence to move forward, to return Butch and Sonny on this vehicle,” Stich said.
“That’s what the team is really striving to do, to try to look at all the data and see if we can get a good physical explanation of what’s happening.”
In the meantime, the wait for a decision, one way or the other, drags on.
“In the end, somebody – some one person – designated to be the decision maker, that person has to come to a conclusion,” Wayne Hale, a former shuttle flight director and program manager, wrote in a blog post earlier this week.
“The engineers will always always always ask for more tests, more analysis, more time to get more information to be more certain of their conclusions. The decider also has to decide when enough has been done. The rub in all of this … is that it always involves the risk to human life.”
Hale concluded his post by saying: “I do not envy today’s decision makers, the ones weighing flight rationale. My only advice is to listen thoroughly, question effectively, ask for more data when necessary. But when it is time, a decision must be made.”
Science & Environment
The Buck Moon is almost here. Here’s when and where to see July’s full moon.
The next full moon is arriving just in time for the weekend. According to NASA, the Buck Moon will make an appearance for three days, from Friday evening to Monday morning, reaching its peak at 6:17 a.m. EDT on Sunday.
The moon is also known as the Thunder Moon, given its overlap with thunderstorm season.
NASA advised viewers to stay safe from the lightning that comes with the storms, but also to indulge in a little fun as the Buck Moon arrives: “As usual, the wearing of suitably celebratory celestial attire is encouraged in honor of the full Moon.”
Why is it called the Buck Moon?
The name stems from a tradition established by the Maine Farmers’ Almanac in the 1930s, according to NASA, when the publication started listing the names of full moons. The Algonquin tribes of the Northeast reportedly called this month’s moon the Buck Moon – a nod to the deer that emerge this time of year.
“Early summer is normally when the new antlers of buck deer push out of their foreheads in coatings of velvety fur,” NASA said.
Other monikers for July’s full moon include Thunder Moon, Asalha Puja, Guru Full Moon, Hay Moon. and Mead Moon.
When will the next full moon take place?
August’s full moon — known as the Sturgeon Moon, according to the almanac.com — will peak on Monday, Aug. 19. This will be the first supermoon of the year, which means it will appear brighter and larger than other full moons.
Another event for stargazers to look forward to is a meteor shower on Saturday, July 31. Those on the East Coast will have to rise early if they want to catch the spectacle of light. According to NASA, the best time to see the shower from Washington, D.C., will be around 2 a.m.
Science & Environment
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Science & Environment
“Cocaine sharks”: Predators off coast of Brazil test positive for drug, scientists say
Sharks in the waters off Brazil have tested positive for cocaine, marine biologists said in a new study, marking the first time the drug has been found in the free-ranging predators.
Thirteen sharpnose sharks were taken from the coast off of Rio de Janeiro and tested for the cocaine and benzoylecgonine, the primary molecule in cocaine. Each shark’s liver and muscles tested positive for high levels of cocaine, the study found, and the female sharks tested had higher concentrations of cocaine in their muscles than male sharks.
The scientists — who dubbed the study “Cocaine Shark” — posited that this may show a correlation between a shark’s weight and size and how it metabolizes cocaine, but the study noted that more research was necessary.
CBS News partner BBC News reported that experts have multiple theories on how the illicit substances are entering the water. It’s possible that illegal labs where cocaine is manufactured could be to blame. Scientists also said that it could be entering the waterway through the excrement of drug users. A less likely theory is that packs of cocaine lost or dumped at sea could be to blame. Cocaine and other illicit drugs have previously been found in water drainage systems and in rivers.
It’s the first study to show levels of cocaine and benzoylecgonine in free-ranging sharks. More research is necessary to see how cocaine consumption affects sharks and other wildlife, the scientists said.
It’s not clear how the cocaine consumption affects the sharks, the study said. Some of the female sharks were pregnant at the time of the study, and it remains unclear how the illicit drugs may have affected the fetuses.
The findings are “very important and potentially worrying,” marine eco-toxicologist Sara Novais, from the Marine and Environmental Sciences Centre of the Polytechnic University of Leiria, told Science magazine.
Researchers have tried to study the impact of illicit drugs on sea life in other parts of the world. Last year, Discovery TV aired a show called “Cocaine Sharks” (which was also the title of a 2023 horror movie) that used experiments to show how sharks might be affected by cocaine. Tracy Fanara, an environmental engineer who worked on the show, told CBS News that the experiments and their results were preliminary, but said it’s likely that sharks are coming in contact with the illicit drug.
“My goal of this experiment was to shed light on the real problem of chemicals in our waterways and impacting our aquatic life and then eventually impacting us,” Fanara said in 2023. “But the goal of the study was basically to see if this is a research question worth exploring more. And I would say, yes, it is.”
Science & Environment
Monday was hottest day ever measured by humans, beating Sunday, European science service says: “Uncharted territory”
Monday was the hottest day ever measured by humans, beating a record set the day before, as countries across the globe continue to feel the heat, according to the European climate change service.
Provisional satellite data published by Copernicus early Wednesday showed that Monday broke Sunday’s mark by 0.1 degree Fahrenheit.
Climate scientists say the world is now as warm as it was 125,000 years ago because of human-caused climate change. While scientists can’t be certain that Monday was the hottest day throughout that period, average temperatures haven’t been this high since long before humans developed agriculture.
The temperature rise in recent decades is in line with what climate scientists projected would happen if humans kept burning fossil fuels at an increasing rate.
“We are in an age where weather and climate records are frequently stretched beyond our tolerance levels, resulting in insurmountable loss of lives and livelihoods,” said Roxy Mathew Koll, a climate scientist at the Indian Institute of Tropical Meteorology.
Copernicus’ preliminary data shows the global average temperature Monday was 62.87 degrees Fahrenheit.
The previous mark before this week was set just a year ago.
Before last year, the previous recorded hottest day was in 2016, when average temperatures were 62.24 degrees.
While 2024 has been extremely warm, what kicked Sunday into new territory was a way toastier than usual Antarctic winter, according to Copernicus. The same thing was happening on the southern continent last year when the record was set in early July.
But it wasn’t just a warmer Antarctica on Sunday. Interior California baked with triple digit heat, complicating the fighting of more than two dozen wildfires in the West. At the same time, Europe sweltered through its own deadly heat wave.
Copernicus records go back to 1940, but other global measurements by the United States and United Kingdom governments go back even further, to 1880. Many scientists, taking those into consideration along with tree rings and ice cores, say last year’s record highs were the hottest the planet has been in about 120,000 years. Now the first six months of 2024 have broken even those.
Frequency of records being surpassed cited as worrisome
Without human-caused climate change, scientists say extreme temperature records wouldn’t be broken nearly as frequently as in recent years.
“It’s certainly a worrying sign coming on the heels of 13 straight record-setting months,” said Berkeley Earth climate scientist Zeke Hausfather, who now estimates there’s a 92% chance that 2024 will beat 2023 as the warmest year on record.
The former head of U.N. climate negotiations, Christiana Figueres, said “We all (will) scorch and fry” if the world doesn’t immediately change course. “One third of global electricity can be produced by solar and wind alone, but targeted national policies have to enable that transformation,” she said.
“What is truly staggering is how large the difference is between the temperature of the last 13 months and the previous temperature records,” Copernius Director Carlo Buontempo said in a statement. “We are now in truly uncharted territory and as the climate keeps warming, we are bound to see new records being broken in future months and years.”
July is generally the hottest month of the year globally, mostly because there’s more land in the Northern Hemisphere, so seasonal patterns there drive global temperatures.
Recent climate change contributors
Scientists blame the supercharged heat mostly on climate change from the burning of coal, oil and natural gas and on livestock agriculture. Other factors include a natural El Nino warming of the central Pacific Ocean, which has since ended. Reduced marine fuel pollution and possibly an undersea volcanic eruption are also causing some additional warmth, but those aren’t as important as greenhouse gases trapping heat, they said.
Because El Nino is likely to be soon replaced by a cooling La Nina, Hausfather said he would be surprised if 2024 sees any more monthly records, but the hot start of the year is still probably enough to make it warmer than last year.
Sunday’s mark was notable but “what really kind of makes your eyeballs jump out” is how the last few years have been so much hotter than previous marks, said Northern Illinois University climate scientist Victor Gensini, who wasn’t part of the Copernicus team. “It’s certainly a fingerprint of climate change.”
University of Pennsylvania climate scientist Michael Mann said the difference between the this year’s and last year’s high mark is so tiny and so preliminary that he is surprised the European climate agency is promoting it.
“We should really never be comparing absolute temperatures for individual days,” Mann said in an email.
Yes, it’s a small difference, Gensini said in an interview, but there have been more than 30,500 days since Copernicus data started in 1940, and this is the hottest of them all.
“What matters is this,” said Texas A&M University climate scientist Andrew Dessler. “The warming will continue as long as we’re dumping greenhouse gases into the atmosphere. … We have the technology to largely stop doing that today. What we lack is political will.”
Science & Environment
“Dark oxygen” created in the ocean without photosynthesis, researchers say
Researchers have discovered bundles of “dark oxygen” being formed on the ocean floor.
In a new study, over a dozen scientists from across Europe and the United States studied “polymetallic nodules,” or chunks of metal, that cover large swaths of the sea floor. Those nodules and other items found on the ocean floor in the deep sea between Hawaii and Mexico were subjected to a range of experiments, including injection with other chemicals or cold seawater.
The experiments showed that more oxygen — which is necessary for all life on Earth — was being created by the nodules than was being consumed. Scientists dubbed this output “dark oxygen.”
About half of the world’s oxygen comes from the ocean, but scientists previously believed it was entirely made by marine plants using sunlight for photosynthesis. Plants on land use the same process, where they absorb carbon dioxide and produce oxygen. But scientists for this study examined nodules about three miles underwater, where no sunlight can reach.
This isn’t the first time attention has been drawn to the nodules. The chunks of metal are made of minerals like cobalt, nickel, manganese and copper that are necessary to make batteries. Those materials may be what causes the production of dark oxygen.
“If you put a battery into seawater, it starts fizzing,” lead researcher Andrew Sweetman, a professor from the Scottish Association for Marine Science, told CBS News partner BBC News. “That’s because the electric current is actually splitting seawater into oxygen and hydrogen [which are the bubbles]. We think that’s happening with these nodules in their natural state.”
The metals on the nodules are valued in the trillions of dollars, setting of a race to pull the nodules up from the ocean’s depths in a process known as deep sea or seabed mining. Environmental activists have decried the practice.
Sweetman and other marine scientists worry that the deep sea mining could disrupt the production of dark oxygen and pose a threat to marine life that may depend on it.
“I don’t see this study as something that will put an end to mining,” Sweetman told the BBC. “[But] we need to explore it in greater detail and we need to use this information and the data we gather in future if we are going to go into the deep ocean and mine it in the most environmentally friendly way possible.”
Science & Environment
What caused the hydrothermal explosion at Yellowstone National Park? A meteorologist explains
Yellowstone National Park visitors were sent running and screaming Tuesday when a hydrothermal explosion spewed boiling hot water and rocks into the air. No one was injured, but it has left some wondering: How does this happen and why wasn’t there any warning?
The Weather Channel’s Stephanie Abrams said explosions like this are caused by underground channels of hot water, which also create Yellowstone’s iconic geysers and hot springs.
“When the pressure rapidly drops in a localized spot, it actually forces the hot water to quickly turn to steam, triggering a hydrothermal explosion since gas takes up more space than liquid,” Abrams said Wednesday on “CBS Mornings.” “And this explosion can rupture the surface, sending mud and debris thousands of feet up and more than half a mile out in the most extreme cases.”
Tuesday’s explosion was not that big, Abrams said, “but a massive amount of rocks and dirt buried the Biscuit Basin,” where the explosion occurred.
A nearby boardwalk was left with a broken fence and was covered in debris. Nearby trees were also killed, with the U.S. Geological Survey saying the plants “can’t stand thermal activity.”
“Because areas heat up and cool down over time, trees will sometimes die out when an area heats up, regrow as it cools down, but then die again when it heats up,” the agency said on X.
The USGS said it considers this explosion small, and that similar explosions happen in the national park “perhaps a couple times a year.” Often, though, they happen in the backcountry and aren’t noticed.
“It was small compared to what Yellowstone is capable of,” USGS Volcanoes said on X. “That’s not to say it was not dramatic or very hazardous — obviously it was. But the big ones leave craters hundreds of feet across.”
The agency also said that “hydrothermal explosions, “being episodes of water suddenly flashing to steam, are notoriously hard to predict” and “may not give warning signs at all.” It likened the eruptions to a pressure cooker.
While Yellowstone sits on a dormant volcano, officials said the explosion was not related to volcanic activity.
“This was an isolated incident in the shallow hot-water system beneath Biscuit Basin,” the USGS said. “It was not triggered by any volcanic activity.”
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