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katyshannon

Nasa seeks new class of astronauts as US nears return to crewed space missions | Scienc... - 0 views

  • A new class of astronauts is being sought by Nasa, now that a return to crewed missions from American soil is on the horizon.
  • The US space agency said it would accept applications for its astronaut corps from 14 December to mid-February 2016 and announce the successful candidates in mid-2017.
  • Since the space shuttle was mothballed in 2011, the only way to get into space has been to secure a seat aboard the three-person Russian Soyuz capsule and fly from Baikonur in Kazakhstan. While the Soyuz will continue to ferry people to and from the International Space Station, other vessels are on course to take over some of the trips. Boeing and Elon Musk’s SpaceX are developing the CST-100 Starliner and Crew Dragon spacecraft, respectively. Meanwhile, Nasa is building the Orion deep space exploration vehicle.
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  • Nasa’s chief administrator, Charles Bolden, said the new class of space-farers would work on missions that will pave the way for putting humans on the surface of Mars. The agency last advertised for astronauts in November 2011.
  • “This next group of American space explorers will inspire the Mars generation to reach for new heights, and help us realise the goal of putting boot prints on the Red Planet,” he said.
  • Before they can hope to join the 47 active astronauts in the corps, candidates need a bachelor’s degree in maths, engineering, biological or physical sciences, but preferably an advanced degree too. On top of that, to meet the basic requirements, at least three years’ professional experience is needed, or at least 1,000 hours piloting a jet plane.
  • Flights on the Boeing and SpaceX vessels are expected to allow a seventh person to live on the International Space Station, meaning the equivalent of one astronaut can work full time on scientific research in space. One priority of space station science is to understand more completely how long duration space travel takes its toll on the human brain and body. Two crew members, Scott Kelly and Mikhail Kornienko, are taking part in the One Year Mission on the station, the results of which could help devise ways of keeping astronauts healthy on the way to and from Mars.
  • Nasas new rocket, the space launch system, along with its Orion capsule, are expected to take astronauts into lunar orbit for missions that will act as stepping stones for the far more ambitious, and technologically challenging, trip to Mars.
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    Nasa is now hiring astronauts for a manned mission to Mars in the near future.
anonymous

NASA Picks Twin Missions To Visit Venus, Earth's 'Evil Twin' : NPR - 0 views

  • NASA has decided to send two new missions to Venus, our closest planetary neighbor, making it the first time the agency will go to this scorching hot world in more than three decades.The news has thrilled planetary scientists who have long argued that Venus deserves more attention because it could be a cautionary tale of a pleasant, Earth-like world that somehow went horribly awry.
  • Venus has been called Earth's "evil twin" because it is about the same size as Earth and probably was created out of similar stuff; it might have even had at one time oceans of liquid water.
  • But Venus appears to have suffered a runaway greenhouse effect. Temperatures at its surface now exceed 800 degrees Fahrenheit, and its atmosphere is toxic to humans.NASA's new administrator, Bill Nelson, announced that after considering four different proposals for its Discovery Program, including proposed trips to moons of Jupiter and Neptune, the agency went all in on Venus.
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  • These Venus missions could be ready to launch in 2026, but the exact timing is still to be determined. "The best case, if possible, would be if they could launch on a single rocket," Gilmore said.
  • The VERITAS mission will have an orbiting probe with instruments that will let scientists create detailed 3D reconstructions of the planet's landscape, and will reveal whether Venus has active plate tectonics and volcanoes.
  • The DAVINCI+ descent probe would sniff in atmospheric gases to measure their composition precisely, and it would be equipped with cameras that could take photos of the surface on the way down.
  • Much remains mysterious about Venus, even though it was the first planet that NASA explored, in the groundbreaking Mariner 2 mission that flew by Venus in 1962. It was the first time a spacecraft had ever successfully reached another world at a time when the planets were only known by peering at them through telescopes.
  • While rovers on Mars have sent back lots of vivid panoramas showing the stark beauty of the red planet, images of the surface of Venus are hard to come by. The heat and intense pressure simply obliterate spacecraft.
  • The last NASA spacecraft sent on a Venus mission was Magellan, which launched in 1989 to map its surface. Its work showed that much of the planet was covered with volcanic flows. The spacecraft burned up in the harsh Venusian atmosphere about 10 hours after being commanded to plunge toward the surface.
yehbru

Opinion: Why China's space program could overtake NASA - CNN - 0 views

  • the country is paying close attention to what innovative US companies like SpaceX are doing as well. To get ahead in space, communism is learning from capitalism.
  • A year after this test, China's main space contractor revealed plans to develop the ability to reuse its Long March 8 booster, which is powered by kerosene fuel, the same type of power that fuels SpaceX rockets. By 2025, Chinese officials said, this rocket would be capable of landing on a sea platform like SpaceX's Falcon 9 booster.
  • A growing number of semi-private Chinese companies have also announced plans to develop reusable rockets.
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  • Government-launched enterprises in both Russia and Europe also recently revealed plans to develop reusable rockets that are similar both in appearance and function to the Falcon 9 booster.
  • But what makes the Chinese efforts to emulate SpaceX particularly notable is the country's expansive ambitions in space and its vast resources to back up these long-term goals.
  • Earlier this month, the Chinese government signed an agreement with Russia to work together to build a Moon base. China has also begun planning to launch crewed missions to Mars and deploy a massive space-based, commercial-scale solar power plant by 2050.
  • As China advances in space, NASA has spent more than $20 billion building a large rocket, the Space Launch System, that could soon be obsolete. And flying this single-use rocket is so expensive that, in combination with its Artemis program, NASA could exceed its congressional funds by more than 43%.
  • Increasingly, the US' main advantage over China lies in its burgeoning commercial space industry, led by SpaceX. If America wants to compete, it should unleash the full potential of SpaceX and other commercial space companies that seek to go further in space, faster and for less money.
  • While SpaceX became a transformational space company, the US and China have been locked in an increasingly intense battle for influence and economic resources on Earth.
knudsenlu

The James Webb, NASA's Next Space Telescope, Is Falling Behind - The Atlantic - 0 views

  • The world’s next great space telescope is falling behind.The James Webb Space Telescope, NASA’s successor to the famed Hubble, is at risk of experiencing significant delays in development, according to a new report from a government agency that audits federal programs.
  • Webb is an $8.8 billion project two decades in the making. Last September, NASA announced it was delaying the telescope’s launch by at least five months, from October 2018 to between March and June 2019. At the time, NASA officials said the change wasn’t due to any problems with the hardware, but because assembling the telescope’s many complex parts was “taking longer than expected.”
  • This is a disheartening forecast for many parties, including NASA; Northrop Grumman, the telescope’s main contractor; and the European and Canadian space agencies, contributors to the telescope’s design and construction. There’s no question that the Webb will launch. After 20 years of development and construction, most of the money has already been spent and the hardware rigorously tested. But the road to the launchpad may be bumpier than everyone expected.
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  • Once completed, the telescope will be an amalgamation of several complex pieces of hardware. Most of the assembly for Webb took place at NASA’s facility in Maryland, the Goddard Spaceflight Center, where it underwent a barrage of tests. In January 2016, scientists and engineers dunked the telescope’s sensitive instruments into a cylindrical chamber that simulates the extreme conditions of outer space. By November 2017, the delicate mirrors and instruments were joined together, and mission members put them through the ringer to make sure they could survive the vibrations and sounds of a powerful rocket launch. They bolted the telescope to metal plates and shook it violently, then wheeled it into an acoustic chamber and blasted it with noise through giant, vuvuzela-shaped speakers.
  • The GAO report starts out by praising the Webb mission for making “considerable progress” in the last few months in hardware integration, but things go downhill from there.The GAO places blame on Northrop Grumman for delays. “For several years, the prime contractor has overestimated workforce reductions, and technical challenges have prevented these planned reductions, necessitating the use of cost reserves,” the report said. Northrop Grumman did not respond to a request for comment about this assessment.
  • If the GAO report is any indication, there may be more troubling news for Webb to come. An independent review board for the Webb mission will conduct its own audit of the project early this year to determine whether it will make its new 2019 launch target.In the meantime, the Webb team has been reviewing and selecting research proposals for its first year of operations. The telescope, 100 more times powerful than Hubble, will be able to see deeper into the universe than ever before. Hundreds of astronomers, from many countries, want their time on it. In its first few months, Webb will focus on nearby targets—the planets in our solar system—and distant ones—glittering galaxies way out in the cosmos. It will return stunning images of it all in tremendous clarity and color. Perhaps then, when we lay eyes on these photographs, the long wait will have seemed worth
rerobinson03

New NASA Missions Will Study Venus, a World Overlooked for Decades - The New York Times - 0 views

  • NASA is finally going back to Venus, for the first time in more than three decades. And a second time too.On Wednesday, Bill Nelson, the NASA administrator, announced the agency’s latest choices for robotic planetary missions, both expected to head to Venus in the late 2020s: DAVINCI+ and VERITAS.
  • In the past year, a neglected Venus re-entered the planetary limelight after a team of scientists using Earth-based telescopes claimed they had discovered compelling evidence for microbes living in the clouds of Venus today where temperatures remain comfortably warm instead of scorching.
  • The other finalists were Io Volcanic Observer, which would have explored Io, a moon of Jupiter that is the most volcanically active body in the solar system, and Trident, which would have sent a spacecraft flying past Triton, an intriguing large moon of Neptune.
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  • Concentrations of krypton, argon, neon and xenon — the noble gases that do not react with other elements — may provide hints about how Venus and its atmosphere formed. The measurements might also find signs of whether water has escaped from Venus into space and whether oceans ever covered the surface.
  • The floors of craters on Venus are dark, but no one knows if that is because they are lava flows from recent eruptions or accumulated sand dunes. “That’s a super important question for understanding the history of volcanism,” Dr. Smrekar said.
  • Also in 2017, for the larger, more expensive New Frontiers competition, NASA considered a Venus mission called Venus In situ Composition Investigations, or Vici, which sought to put two landers on the planet’s surface. It was passed over for Dragonfly, which will send a plutonium-powered drone to fly on Titan, the largest moon of Saturn.In addition, planetary scientists are in the middle of putting together their once-a-decade recommendations to NASA about their priorities. NASA usually undertakes only one flagship mission — a big, ambitious, expensive effort — at a time. A Venus flagship mission under consideration would include two balloons that would float in the atmosphere for a month.
  • One goal of the Trident mission was to study plumes that could be emitted from a subsurface ocean on Triton, Neptune’s large moon. If hypotheses for how those plumes form are correct, by the time another mission reached Triton, the moon’s activity will have ceased because of its position in orbit relative to the sun. There may not be another opportunity to observe the outbursts for 100 years.
nrashkind

Astronauts Christina Koch and Jessica Meir successfully complete first all-female space... - 0 views

shared by nrashkind on 26 Oct 19 - No Cached
  • NASA astronauts Jessica Meir and Christina Koch conducted the first all-female spacewalk outside of the International Space Station.
  • The spacewalk officially began at 7:38 a.m. ET and lasted for seven hours and 17 minutes, ending at 2:55 p.m. ET
  • This was the fourth spacewalk for Koch and the first for Meir. Based on their position on the platform, the astronauts were able to see the Earth pass beneath their feet.
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  • The first woman to conduct a spacewalk was Russian cosmonaut Svetlana Savitskaya in 1984, followed closely by NASA astronaut Kathy Sullivan.
  • "The job that you do is incredible," President Donald Trump told them. "I'm thrilled to be speaking with two brave American astronauts making history
  • This is the first time for a woman outside of the space station
  • Koch and Meir spoke about women working in human spaceflight during a recent news conference.
  • "I think it's important because of the historical nature of what we're doing and that in the past, women haven't always been at the table,"
  • "There are a lot of people that derive motivation from inspiring stories from people that look like them and I think it's an important aspect of the story to tell,
  • She and Koch have trained together for the past six years because they're members of the same astronaut class. Meir is set to spend more than six months on board the station.
  • Koch and Meir replaced a faulty battery charge/discharge unit that failed to activate after a spacewalk on October 11, according to the agency.
  • The space station is powered by solar arrays and four sets of batteries
  • Luckily, the faulty unit hasn't changed anything for the astronauts or experiments on board.
  • Although floating in space looks easy, astronauts say that spacewalks are one of the most physically challenging things they can do, according to NASA.
  • For the intended spacewalk in March, Koch was going to be paired with astronaut Anne McClain
  • "However, individuals' sizing needs may change when they are on orbit, in response to the changes living in microgravity can bring about in a body," Dean said.
  • Fellow NASA astronaut Drew Morgan, also currently on the station, tweeted in support of Koch and Meir during the walk. "So proud of my astrosisters @Astro_Christina and @Astro_Jessica! We've been training together since our selection in 2013, and now they're out on a history-making spacewalk! #AllWomanSpacewalk"
  • The upcoming spacewalks will help replace solar array batteries and upgrade them to lithium-ion batteries, as well as refurbish the Alpha Magnetic Spectrometer, a scientific instrument "that explores the fundamental nature of the universe," according to NASA.
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    Brief description of the first all-female spacewalk
bluekoenig

Space Shuttle Challenger Disaster: Major Malfunction | Retro Report | The New York Time... - 0 views

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    In 1986 and 2003, NASA had its two biggest disasters ever with the explosion of the Challenger space shuttle on launch and the annihilation of the Columbia shuttle on reentry. NASA became over ambitious after the Appolo missions, attempting to launch shuttles up to 60 times a year due to their funding by private organizations who wanted the shuttles to release experiments and satellites into space. They started out successful with the original Columbia missions and then they became sloppy with the building and safety of their rocket boosters, which later caused the explosion of the Challenger rocket. NASA reevaluated its boundaries for acceptable risk and purged the members of NASA who pushed the Challenger mission through despite the risks. They stopped all launches for years Then in 2003 the Columbia shuttle had its first mission in years and a piece of foam from the rocket hit the wing of the shuttle, causing what they thought were possible damages. They made another bad call in not alerting the crew until the last minute and not investigating, changing the reentry plan, or trying to mend it while in space due to the fact that other foam had not caused issues before. The Columbia burned up on reentry after the piece of foam destroyed a heat resistant panel on the wing that acted as a weak point. NASA's biggest issue throughout all of this was refusing to learn from their mistakes, the Columbia mission could have been saved had NASA taken the proper protocols and tried harder to assess and fix the situation.
anonymous

Nasa mission discovers Jupiter's inner secrets - CNN - 1 views

  • NASA spacecraft Juno has collected new data on its mission to Jupiter revealing some of the swirling inner mysteries of the giant gas-planet.The surface of Jupiter, the fifth planet from the sun and the largest in the solar system, consists of alternating bright and dark bands of gas and winds flowing in opposite directions at massive speed.Previously there have been extensive studies of the helium-and-hydrogen planet's surface, but now gravity measurements collected by Juno indicate that this turbulent outer layer extends to a depth of 1,900 miles (3,000 kilometers).
  • "Galileo viewed the stripes on Jupiter more than 400 years ago," Yohai Kaspi, Juno co-investigator from the Weizmann Institute of Science, Rehovot, Israel, and lead author of a Nature paper on Jupiter's deep weather layer, was quoted as saying on NASA's website."Until now, we only had a superficial understanding of them and have been able to relate these stripes to cloud features along Jupiter's jets. Now, following the Juno gravity measurements, we know how deep the jets extend and what their structure is beneath the visible clouds," said Kaspi, who likened the advancement to going from a "2-D picture to a 3-D version in high definition."
  • "Juno's discovery has implications for other worlds in our solar system and beyond."
ethanshilling

NASA Suceeds in 2nd Test of New S.L.S. Moon Rocket - The New York Times - 0 views

  • On Thursday, NASA’s new big rocket, the Space Launch System, fired its engines for more than 8 minutes and did not go anywhere.
  • This test, called a hot fire, was a crucial step for the rocket, which has been in development for more than a decade.
  • The Space Launch System is the 21st-century equivalent of the Saturn 5 that took NASA astronauts to the moon in the 1960s and 1970s.
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  • The first time NASA attempted this hot fire test in January, the engines rumbled to life. But instead of firing for eight minutes, the rocket’s computer shut down the engines after only about one minute.
  • Although there are many other rockets available today, they are too small to launch spacecraft that can carry people to the moon.
  • Although the Space Launch System will be expensive — up to $2 billion a launch for a rocket that can be used only once — Congress has provided steadfast financial support for it so far.
  • “The reason why we test on the ground in that sort of environment is we want to control the system and monitor the system closely and make sure if we have a problem we can shut down,” said Steve Jurczyk, who is serving as NASA’s acting administrator as the agency waits for President Biden to name his nominee for the post
  • Because of the size of the Space Launch System core stage — more than 200 feet tall and 27.6 feet wide — the test stand has been modified with an additional steel superstructure.
jordancart33

Liquid water exists on Mars, boosting hopes for life, NASA says - CNN.com - 0 views

  • Potentially life-giving water still flows across the ancient surface of Mars from time to time, NASA scientists said Monday in revealing a potential breakthrough in both the search for life beyond Earth and human hopes to one day travel there.
johnsonma23

What if Nixon beat JFK? Everything might be different - CNNPolitics.com - 0 views

  • What if JFK had lost? 5 things that might be different
  • If just a few thousand votes in a few key states had gone the other way that day, you could argue that Cuba might now be our 51st state.
  • By the time it was over, Kennedy had won and Nixon's camp was quietly accusing the other side of dirty tricks. The election was about much more than Washington bragging rights.
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  • It ended up influencing events that would drive the next 20 years of the Cold War.
  • When it came to the Soviets, Nixon had more experience than Kennedy. Vice President Nixon had already faced off against Khrushchev in the famous "Kitchen Debate" during a visit to Moscow in 1959.
  • Nixon's language at the time was quite interventionist and hawkish. ... That makes me worry that he might have tried to invade Cuba."
  • A year later, it was discovered that the Soviets had deployed nuclear missiles in Cuba — just 90 miles from the United States.
  • "Kennedy allowed himself to be bullied by Khrushchev [in Vienna] and he regretted it," said Evan Thomas, an award-winning journalist, editor and author of "Being Nixon: A Man Divided."
  • If Nixon had made a stronger impression than Kennedy, perhaps the Soviets would never have put those missiles in Cuba. Then there never would have been a missile crisis at all.
  • In 1961, two months after a failed invasion by CIA-backed Cuban exiles at Cuba's Bay of Pigs, Kennedy met with Soviet leader Nikita Khrushchev in Austria.
  • f Nixon had won in 1960, it's likely Kennedy would not have been targeted for assassination -- and that means he might have lived long enough for his infamous sexual dalliances to become fodder for the news media.
  • It's hard to imagine a universe where Neil Armstrong did not walk on the moon. Would Nixon have called for a moon landing, as JFK did?
  • Nixon continued to support the lunar program during much of his presidency, which spanned all six moon landings.
  • "Under Nixon, NASA became just another domestic program, and the agency's budget decreased even as it retained ambitious goals," writes former NASA consultant Jason Callahan of the Planetary Society.
bluekoenig

Space Shuttle Challenger Disaster - HISTORY - 0 views

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    On January 28, 1986, the Challenger space shuttle exploded shortly after take-off when two fuel tank seals failed, releasing fuel into a space where it could rapidly combust. This was NASAs first serious disaster and the first time a regular person, a teacher who was going to teach a lesson from space, onto a mission. The disaster rocked NASA, but not enough to prevent another disaster due to carelessness or pressure to launch in less than 30 years. If you'd like to know more about the behind the scenes of this tragedy and what was done to stop it in the future, I previously posted a video detailing the disaster and its causes.
mimiterranova

New NASA Missions Will Study Venus, a World Overlooked for Decades - The New York Times - 0 views

  • NASA is finally going back to Venus, for the first time in more than three decades. And a second time too.
  • Venus is in many ways a twin of Earth — it is comparable in size, mass and composition, and it is the planet whose orbit is the closest to Earth’s. But the history of the two planets diverged. While Earth is moderate in temperature and largely covered with water, Venus, with a dense atmosphere of carbon dioxide, is a hellishly hot 900 degrees Fahrenheit at the surface. After numerous missions by the United States and the Soviet Union to explore it in the 1970s, ’80s and ’90s, attention shifted elsewhere.
  • They said they had detected a molecule, phosphine, for which they could come up with no plausible explanation for how it might have formed there except as the waste product of living organisms.
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  • Concentrations of krypton, argon, neon and xenon — the noble gases that do not react with other elements — may provide hints about how Venus and its atmosphere formed. The measurements might also find signs of whether water has escaped from Venus into space and whether oceans ever covered the surface.
  • The new mission will be able to provide topographic measurements that are more than 100 times better than what Magellan produced, stitched together into a highly detailed three-dimensional map.
brickol

Nasa astronauts begin first ever all-female spacewalk | Science | The Guardian - 0 views

  • Two Nasa astronauts have embarked on the first all-female space walk in a historic first.
  • pacewalk, known as an extra-vehicular activity (EVA) in astronaut jargon, took place seven months after the original planned date for an all-female outing, which had to be scrapped because the ISS had only one medium-sized spacesuit on board.
  • I think it’s important because of the historical nature of what we’re doing,” Koch said ahead of the spacewalk. “In the past, women haven’t always been at the table. It’s wonderful to be contributing to the space program at a time when all contributions are being accepted, when everyone has a role. That can lead in turn to increased chance for success.”
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  • “This is significant … As much as it’s worth celebrating, many of us are looking forward to it just being normal.”
grayton downing

BBC News - Nasa reverses conference's ban on Chinese scientists - 0 views

  • The US space agency has said it will allow Chinese scientists to attend an astronomy conference in California next month, reversing an earlier ban.
  • Nasa put the earlier ban down to a misinterpretation of its policy on foreign nationals.
  • agency faced criticism from Chinese officials and US scientists who claimed Chinese students and researchers in their labs were being subjected to discrimination.
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  • Earlier this month the US government partially shut down operations for 16 days, putting hundreds of thousands of federal employees on leave.
rachelramirez

NASA Says Signs of Liquid Water Flowing on Mars - The New York Times - 0 views

  • NASA Says Signs of Liquid Water Flowing on Mars
  • Though young Mars was inundated by rivers, lakes and maybe even an ocean a few billion years ago, the modern moisture is modest. Scientists have long known that large amounts of water remain — but frozen solid in the polar ice caps.
  • They named the streaks recurrent slope linae, or R.S.L.s, and many thousands of them have now been spotted.
jordancart33

NASA Confirms Evidence That Liquid Water Flows on Today's Mars - 0 views

  • New findings from NASA's Mars Reconnaissance Orbiter (MRO) provide the strongest evidence yet that liquid water flows intermittently on present-day Mars.
  • "We found the hydrated salts only when the seasonal features were widest, which suggests that either the dark streaks themselves or a process that forms them is the source of the hydration.
  • This is a significant development, as it appears to confirm that water -- albeit briny -- is flowing today on the surface of Mars."
g-dragon

China: We will be on Mars by the end of 2020 - CNN - 0 views

  • China is aiming to own the race for space in the next decade
  • China's ambitious and fast-growing space program is targeting a landing on the dark side of the moon by 2018, and reaching Mars before the end of the decade
  • It has also sent five crews into space in the same span of time, making it only the third country in the world -- after Russia and the United States -- with such success.
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  • Our overall goal is that, by around 2030, China will be among the major space powers of the world
  • China was late to the space race
  • But in the decades since, China has pumped billions of dollars and other resources into research and training
  • China has staged a spacewalk, landed a rover on the moon and launched a space lab that it hopes paves the way for a 20-ton space station
  • He said other plans include sending probes to Jupiter and its moons
  • China is still studying the possibility of sending a man to the moon, but focusing on robotic lunar missions for now, including making the first soft landing on the far side of the moon around 2018
  • He also emphasized China's increasing cooperation with other international space agencies -- with NASA being the exception
  • the U.S. Congress has prohibited NASA from working with China because of national security concerns
  • NASA should be focused primarily on deep space activities rather than Earth-centric work that is better handled by other agencies," wrote Robert Walker and Peter Navarro
  • While the American government's space program has suffered from under-investment, both China and Russia continue to move briskly forward with military-focused initiatives," they added. "Each continues to develop weapons explicitly designed... to 'deny, degrade, deceive, disrupt, or destroy' America's eyes and ears in space
  • Chinese officials on Tuesday reiterated the country's "peaceful motives" behind its space exploration and utilization, but many have pointed to Walker and Navarro's article as a sign that potential U.S.-China collaboration in space would be unlikely
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