NASA calls off spacewalk after spacesuit water leak
NASA on Monday canceled a spacewalk at the International Space Station after water leaked from an astronaut's spacesuit.
NASA on Monday canceled a spacewalk at the International Space Station after water leaked from an astronaut's spacesuit.
Space Exploration
Jun 25, 2024
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A spacewalk scheduled for two astronauts outside the International Space Station was canceled by NASA about an hour before it was to begin Thursday morning.
Space Exploration
Jun 13, 2024
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Humans have long dreamed of setting foot on the moon and other planetary bodies such as Mars. Since the 1960s, space travelers have donned suits designed to protect them from the vacuum of space and stepped out into the unknown.
Space Exploration
Mar 7, 2024
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The crew of China's orbiting space station has completed the first of several planned spacewalks of their six-month mission, pushing such activities into the realm of routine for the country's astronauts.
Space Exploration
Feb 10, 2023
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A 38-year-old retired NASA satellite is about to fall from the sky.
Space Exploration
Jan 7, 2023
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Two Chinese astronauts went on a spacewalk Saturday from a new space station that is due to be completed later this year.
Space Exploration
Sep 18, 2022
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A Russian spacewalker had to rush back inside the International Space Station on Wednesday when the battery voltage in his spacesuit suddenly dropped.
Space Exploration
Aug 17, 2022
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ESA astronaut Samantha Cristoforetti was launched to the International Space Station on 27 April as a part of Crew-4 for her second mission, Minerva. One hundred days in, mission Minerva is still going strong. From completing ...
Space Exploration
Aug 8, 2022
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Three Chinese astronauts returned to Earth on Saturday after 183 days in space, ending China's longest crewed mission as it continues its quest to become a major space power.
Space Exploration
Apr 16, 2022
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Spacewalking astronauts replaced a broken antenna outside the International Space Station on Thursday after getting NASA's all-clear for orbiting debris.
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Dec 2, 2021
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Extra-vehicular activity (EVA) is work done by an astronaut away from the Earth, and outside of a spacecraft. The term most commonly applies to an EVA made outside a craft orbiting Earth (a spacewalk), but also applies to an EVA made on the surface of the Moon (a moonwalk). In the later lunar landing missions (Apollo 15, 16, and 17) the command module pilot (CMP) did an EVA to retrieve film canisters on the return trip; he was assisted by the lunar module pilot (LMP) who remained at the open CM hatch. These trans-Earth EVAs were the only spacewalks ever conducted in deep space.
Due to the different designs of the early spacecraft, the American and Soviet space programs also define an EVA differently. Russians define an EVA as occurring when a cosmonaut is in a vacuum. An American EVA begins when the astronaut switches the Extravehicular Mobility Unit (EMU) to battery power. A "Stand-up" EVA (SEVA) is where the astronaut does not fully exit a spacecraft, but is completely reliant on the spacesuit for environmental support. Its name derives from the astronaut "standing up" in the open hatch, usually to film or assist a spacewalking astronaut.
EVAs may be either tethered (the astronaut is connected to the spacecraft, oxygen can be supplied through a tube, no propulsion is needed to return to the spacecraft) or untethered. When the tether performs life support functions such as providing oxygen, it is called an umbilical. Untethered spacewalks were only performed on three missions in 1984 using the Manned Maneuvering Unit (MMU), and on a flight test in 1994 of the Simplified Aid for EVA Rescue (SAFER). A SAFER is a safety device worn on tethered U.S. EVAs, since the capability of returning to the spacecraft is essential.
As of 2009[update], Russia, the United States, and China are the only countries with a demonstrated capability to conduct an EVA.
This text uses material from Wikipedia, licensed under CC BY-SA