Showing posts with label space travel. Show all posts
Showing posts with label space travel. Show all posts

Scott Parazynski: From Space Shuttle to the Summit of Mount Everest

Whether it’s through NASA missions or climbing Mount Everest, Scott Parazynski recounts his motivating story and offers guidance to explorers on achieving success.

In March 2009, American Scott Parazynski — a seasoned astronaut with five NASA space shuttle flights under his belt, including seven extravehicular activities, and over 23 million miles (37 million kilometers) logged — decided to retire from wearing his spacesuit.

"The opportunity to fly came only once, perhaps repeated two times at most, yet I was eager to extend my capabilities as both an innovator and business leader," states the individual who is 63 years old.

Several months following his retirement, the US space agency , Parazynski attempted to summit Mount Everest However, at 7,470 metres (24,500 feet), he had to abandon due to a back injury.

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Unshaken, he made another attempt the next year and successfully scaled Earth's tallest mountain above sea level. He achieved this feat by reaching the summit at 4 am on May 20, 2009, which marked his status as the first individual to have traveled into space and also climbed the world’s highest peak.

Parazynski is a physician by background—he served as the personal doctor to his idol, John Glenn, onboard the Discovery shuttle during the former US senator’s comeback trip to space in 1998.

His other daring accomplishments encompass scuba diving within a volcanic lake amidst the Andes mountain range in South America, being the first person to descend into Nicaragua’s Masaya volcano, and exploring Antarctica, where he managed the healthcare for personnel involved in the United States government’s Antarctic program.

He is also a seasoned pilot, boasting over 2,500 flight hours, as well as an accomplished athlete; in 1988, he participated in the tryouts for the U.S. Olympic luge team. "I fell just short of making it," he admits.

I aim to motivate individuals not only to aspire to be astronauts but also to strive to be their highest selves, contributing to society in fields like science, engineering, math, or anything else they're passionate about.
Scott Parazynski, ex-NASA astronaut

Even with his accomplishments, Parazynski stays modest and equally enjoys discussing his successes as much as his setbacks, which he openly shared in his 2017 autobiography. The Sky Below.

“I didn’t want this book to focus solely on life’s triumphs,” states Parazynski. He mentions that many autobiographies and biographies he has read tend to revolve around “Take a look at how splendid and effortless my journey through life was.”

He remarks that life is difficult, thus he feels proud as it showcases overcoming hurdles and challenges throughout. The Sky Below .

His rich life journey has made him a highly requested speaker worldwide, and this month he was featured in Hong Kong speaking at events organized by the Royal Geographical Society Hong Kong.

I aim to inspire individuals not only to aspire to be astronauts, but to strive to be their highest selves and contribute positively to society through fields like science, engineering, math, or anything else they're passionate about—I simply wish to encourage people to make an effort towards advancing our world in whichever manner they can.

At the Mandarin Oriental hotel In Hong Kong’s Central district, Parazynski walks confidently into the clubroom with his hand extended.

What strikes you initially is his height, approximately six feet two inches (188cm), though he appeared even more towering when in space.

"When we venture into space, our bodies undergo several changes such as weakening muscles and reduced bone density along with increased strain on the heart — it diminishes slightly unless rigorous daily exercise is maintained," says Parazynski, who previously focused his initial medical studies on designing workout equipment for extended space missions.

In space, Parazynski grew approximately two and a half inches taller.

"He explains that we naturally have a curved spine, but in space, without the downward pull of gravity, the spine elongates." Several trips to space led to a herniated disk. tear in his lower back .

For individuals spending extended periods in space—six months or longer—they get exposed to significant amounts of radiation, which increases their chances of developing cancer.

Adapting to life on Earth poses difficulties as well.

"After every mission, you experience an amazing rush, followed by the mundane tasks of taking out the trash, navigating traffic, and paying the bills," he remarks, chuckling.

However, he wouldn’t change it for anything else; his career has been “a blessing” — a childhood aspiration turned reality.

At a young age, he became acquainted with the space sector. "My father worked at Boeing And I was involved in the space program that assisted in building the rockets which initially sent astronauts to the moon as part of Project Apollo, so I was really into that."

His passion for travel was instilled quite young as well. At the age of eleven, he relocated with his family to Senegal in Western Africa, followed by moves to Lebanon, Greece, and Iran.

Throughout all those years, his dream was to become an astronaut.

I kept it under wraps as I believed folks might consider me outlandish, yet it lingered at the edge of my thoughts.

Following his medical studies and graduation from Stanford University in the U.S., Parazynski became part of NASA in 1992.

“I possessed the necessary qualifications to apply, which allowed me to chase my childhood ambition and spend 17 years at NASA,” states Parazynski, who was inducted into the United States Astronaut Hall of Fame in 2016.

While working at NASA, he accumulated over 47 hours of extravehicular activity during spacewalks. This includes one conducted in 2007 aimed at repairing a solar panel on the International Space Station. International Space Station where he was situated on a 90-foot extension arm, facing the danger of electric shock. This mission is considered one of the most hazardous space walks in history.

However, every risk taken was worthwhile, he states. Catching sight of the Earth's curve from space for the initial time left him astounded. He emphasizes that nothing could have adequately prepared him for this experience.

You're moving at breakneck speeds, you know, about 25,000 kilometers per hour, completing an orbit around the Earth every 90 minutes, which means you'll see either a sunrise or a sunset approximately every 25 minutes.

Like numerous astronauts before him, space travel has had a transformative impact on Parazynski. "Upon returning, everyone experiences a significant change for the better—typically developing a strong commitment to environmentalism."

Few return with a spiritual awakening, though I wasn’t blessed with one; nonetheless, I felt an overwhelming sense of fortune and humility.

I departed feeling amazed and driven to contribute everything possible towards enhancing the quality of life on our planet.

One of the most amazing experiences I've had was flying beneath the Northern Lights during the nighttime.
Scott Parazynski

This involves interacting with Proteus Ocean Group, a cutting-edge underwater scientific research facility established by Fabien Cousteau, who is the grandson of renowned French sea explorer. Jacques Cousteau .

Parazynski's dedication to protecting the oceans has been ignited by his enduring fascination with diving, which began when he was just 1 eleven years old.

The seas are essential for our planet’s survival; thus, I am dedicated to safeguarding them... Since 70 percent of our world is submerged under water, it would only be fitting to rename it Planet Ocean rather than Planet Earth.

Currently, Parazynski’s primary role involves leading OnwardAir, an eco-tech company he established. The business focuses on creating electric vertical takeoff and landing vehicles enhanced with sophisticated control systems.

He is equally thrilled about the "renaissance of space travel".

What’s currently going on in the realm of commercial space flights? SpaceX , Blue Origin and Virgin Galactic Companies that can securely and repeatedly bring more individuals into space are truly thrilling.

He heaps praise onto NASA's Artemis program, which represents a significant move toward sending humans back to the moon, and he speaks positively about the plans put forth by Elon Musk aims to establish a colony on Mars "is human destiny".

Regarding the status of space exploration, this is a non-partisan matter in the United States, according to Parazynski.

He notes that there’s significant backing for space exploration, which is fantastic, yet simultaneously, substantial reductions are being made across all agencies, making it difficult to predict how this will ultimately turn out.

He highlights that one of the greatest aspects of investing in space is how it yields returns across various sectors here on Earth.

"When I enter a hospital's operating room or intensive care unit, there are numerous technologies present with roots tracing back to the space program," he explains.

In outer space, we needed to determine ways to support life for the initial astronauts and conduct surgeries as well as lab experiments.

You need to shrink various sensors and devise innovative methods for operating without gravity, yet this also opens up possibilities for treating individuals in distant and rural areas... it essentially marked the start of telemedicine and telehealth.

And we mustn't overlook that space travel sounds great, offering those fortunate—or wealthy—enough to witness it an unparalleled visual spectacle, especially during the spacewalks where “you’re outside in your own small spacecraft, surrounded by the cosmos and gazing down at our home planet.”

Among the most impressive experiences I've had was soaring through the Northern Lights during the nighttime," recounts Parazynski. "A delicate veil of faint luminescence stretched hundreds of miles vertically across the sky, and we passed directly through it. Absolutely surreal.

A notable moment was capturing images of Mount Everest from space—a challenging task given the supersonic speed during travel.

For individuals looking for motivation from one who has pushed boundaries extensively, Parazynski mentions that he uses pre-visualization—a method he acquired during his time as an athlete.

By mentally rehearsing the sequence of events from that day’s ascent, or a complex medical operation, or a challenging extravehicular activity, you significantly increase your chances of success.

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European Hydrogen Plane Aims for First Non-Stop Global Flight

In a workshop along France’s Atlantic shore, aviation trailblazer Bertrand Piccard and his team are intensively working to get ready for a flight that has the potential to revolutionize air travel entirely.

A decade ago, when Piccard led a highly publicized global flight in a solar-powered aircraft, it increased consciousness regarding climate change but offered scant potential for transforming commercial aviation.

Currently, the 66-year-old Swiss explorer who led Solar Impulse is reaching for even greater heights with the ambition to pave the way towards more environmentally friendly commercial flights instead of relying on conventional fossil-fuel-driven aircraft. This time, he plans to utilize extremely cold liquid hydrogen as his power source.

The Climate Impulse initiative commenced last February with the aim of piloting a two-seat aircraft around the world without stopping for refueling within nine days, powered exclusively by so-called green hydrogen.

That's hydrogen extracted from water molecules via a method known as electrolysis, powered by renewable electricity.

This week, the Climate Impulse group, supported by investors such as Airbus and a science accelerator named Syensqo ("science-co"), which emerged from Belgium’s Solvay pharmaceutical firm, shared their initial year achievements with reporters in Les Sables d'Olonne, a coastal community famous for hosting the Vendée Globe around-the-world yacht race.

When is Climate Impulse scheduled to take off?

The initial test flights are scheduled for next year, however, the challenging circumnavigation journey is slated for 2028. Constructed using lightweight composite materials, this aircraft relies heavily on numerous unproven technologies and remains quite uncertain of success.

Piccard states that a leading aircraft company would be unwilling to assume the risk involved in developing a prototype like Climate Impulse, particularly if there's a possibility of failure.

As a trailblazer, it’s my responsibility," he stated during an interview. "Demonstrating that it can be done provides a significant motivation for others to carry on.

Despite success with this project, specialists indicate that widespread commercial green hydrogen-driven flights remain likely several decades out. It has attracted substantial investments amounting to tens of millions of euros, and the expanding workforce now consists of scores of employees.

In 2015, the sun-driven aircraft represented a significant technical achievement; however, it lacked scalability, according to Raphael Dinelli, an engineer at Climate Impulse and one of the co-pilots. Due to its restricted range, this airplane needed over a dozen stopovers for its journey encircling the globe.

Climate Impulse is designed to launch independently, circle the globe for approximately 40,000 kilometers (around 25,000 miles) following the equatorial path, and come back to its origin without requiring any aerial refueling or intermediate landings.

My role is to lead the way. By demonstrating what can be done, we provide a significant motivation for others to follow suit.
Bertand Piccard
Aviation pioneer

What is the process for flying with Climate Impulse?

The regulated discharge of liquid hydrogen from highly insulated tanks beneath the aircraft’s wings generates power that permeates the membrane of a fuel cell, which then drives the plane.

"The plane has the wingspan of an Airbus 320: 34 m (about 110 ft). It weighs 5-1/2 tons and it flies at 180 km/h — that means 100 knots at 10,000 ft (3,000 m) altitude," Piccard said on Thursday.

The objective includes harnessing power from the "turbulent zone" within the atmosphere, an area that might someday assist aviation companies in reducing their fuel consumption, as mentioned by him.

Since it's hydrogen, the sole emission produced will be water vapor. Nevertheless, external specialists warn that the ecological effect of these water-vapor contrails is still uncertain when considering practical or extensive applications.

According to the International Energy Agency, air travel accounts for approximately 2 percent of worldwide carbon dioxide emissions.

Hydrogen has been utilized in aviation for many years, though typically as a gas rather than a liquid. Transitioning to liquid hydrogen would require considerable time to implement effectively. Currently, fossil fuels remain more economical and efficient, thus they continue to be the primary source of hydrogen production.

Numerous governments aim to increase the production of green hydrogen, yet currently, the global capacity for generating sufficient clean electricity for terrestrial demands remains inadequate. This challenge becomes even more pronounced when considering the substantial requirements needed to support widespread usage by aircraft in flight.

What happens next?

Over the past year, the team has constructed the cockpit shell, initiated work on the wing spar, and completed various internal elements. These features encompass pivoting seats, a sleeping berth, and an exercise device similar to a stationary bike designed to enhance blood flow for the co-pilots during their nine-day confinement in a confined space with limited oxygen levels.

The hardest parts await.

This year will see tests conducted on the fuel cells and propulsion systems to determine whether the electric motor, propeller, and batteries can be utilized for an initial phase of completely electrified flights.

Dinelli mentioned that the most challenging aspect is controlling the flow of liquid hydrogen to maximize efficiency and extend the vehicle’s range as much as possible.

A further hurdle is maintaining the liquid hydrogen at -253 degrees Celsius (-423 Fahrenheit), which is almost absolute zero. It’s crucial to build a tank that is entirely free from leaks.

Hydrogen liquid can easily ignite; therefore, even slight leakage might lead to severe consequences.

We haven’t experienced a ‘Tesla moment’ in aviation just yet. Hydrogen holds the potential to become that transformative milestone for aviation, which is precisely why getting it right matters so much.
Nikhil Sachdeva
Aviation expert, Roland Berger

Does green hydrogen-fueled aviation have a future?

Up until now, liquid hydrogen may have most notably served as a fuel to launch rockets into space.

The aviation sector contributes a modest portion of total carbon emissions; however, this contribution is increasing more rapidly than in any other industry. This growth outpaces advancements seen with electric vehicles like cars and trucks on land, where such technologies have developed much quicker.

The batteries used in electric vehicles on the road today are quite heavy, and reducing battery weight in aircraft will be essential for successful electric-powered aviation.

"There hasn't been an 'Aviation Tesla' moment yet," stated Nikhil Sachdeva, a specialist in helping the aviation industry shift towards more environmentally friendly technologies at consultancy firm Roland Berger.

Hydrogen holds the promise of being the solution for aviation, which is precisely why getting this right is crucial.

Utilizing extremely cold liquid hydrogen is "incredibly challenging, and currently we can only manage it for a few minutes at a time. We're discussing making it safe for operation over several hours," according to Sachdeva.

However, Solar Impulse also encountered skepticism, he noted, and Piccard's group has shown that they can achieve what others might see as unattainable.

NASA Scientist Develops Fuel-Free Space Rocket

A NASA researcher has successfully developed a rocket that functions without requiring any fuel.

Dr. Charles Buhler, an engineer and co-founder of Exodus Propulsion Technologies, announced that his team has developed a fuel-free propulsion system, seemingly overcoming the known laws of physics.

Following years of study and trials, Charles Buhler thinks this advancement will revolutionize the field and redefine propulsion technology.

"The most important message to convey to the public is that a major discovery has occurred," he said.

This groundbreaking system produces thrust through electric fields instead of ejecting mass, representing a significant shift away from conventional propulsion techniques.

Charles Buhler has likewise shown willingness to work with others in order to enhance and perfect this innovative technology even more.

(QG - Source: The Brighter Side of News / Image: © Pixabay)

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NASA:兩位美國宇航員18日從國際空間站順利返航回地球

(法新社華盛頓16日電) 美國國家航空暨太空總署(NASA)說,兩名被困在國際太空站(ISS)9個多月的美國太空人將於本月18日晚間返回地球。

魏摩爾(Butch Wilmore)和威廉斯(Suni Williams)將與另1名美國太空人和1名俄羅斯太空人一起乘坐太空探索科技公司(SpaceX)的乘龍號(Crew Dragon)太空船返回地球,太空船在今天凌晨抵達國際太空站。

由於原定接送這兩名太空人的波音(Boeing)星際飛機(Starliner)太空船出現推進系統問題,評估不適合將他們送回地球,兩名太空人自去年6月以來一直滯留在國際太空站。

NASA在今天晚間的聲明中說,已將太空人預計在佛羅里達州海岸的濺落時間提前到18日傍晚5時57分(台灣時間19日清晨5時57分)。NASA原本預計濺落時間不早於19日。

NASA表示:「更新後的返回目標仍讓太空站機組人員有時間完成交接,同時在預計本週稍晚天氣條件較差的情況下提供操作彈性。」

NASA太空人赫格(Nick Hague)和俄羅斯太空人戈布諾夫(Aleksandr Gorbunov)也將乘坐乘龍號太空船返回,這趟旅程將從17日晚間開始準備關閉艙門時直播。

魏摩爾和威廉斯原本應在數天內往返,結果卻被困了9個月,如今準備返回地球,代表他們的磨難即將結束。他們的停留時間比國際太空站太空人大約6個月的標準輪調時間長得多。

但這還是遠遠比不上NASA太空人盧比歐(Frank Rubio)2023年在國際太空站創下的371天美國紀錄,或俄羅斯太空人波利雅科夫(Valeri Polyakov)在和平號(MIR)太空站連續停留437天所創下的世界紀錄。(譯者:林沂鋒/核稿:曾依璇)