Record-setting spacewalk ends with antenna in wrong spot
A record-setting Russian spacewalk ended with a critical antenna in the wrong position Friday outside the International Space Station.
A record-setting Russian spacewalk ended with a critical antenna in the wrong position Friday outside the International Space Station.
Space Exploration
Feb 3, 2018
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Spacewalking astronauts worked to complete repairs to a cosmic ray detector outside the International Space Station on Saturday and give it new life.
Space Exploration
Jan 25, 2020
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Astronauts hustled through the first of five spacewalks to replace old batteries at the International Space Station on Sunday.
Space Exploration
Oct 6, 2019
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An equipment water leak shortened Friday's spacewalk by two U.S. astronauts at the International Space Station, but they still managed to replace a faulty electronics box.
Space Exploration
May 12, 2017
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(AP)—The spacewalking astronaut who came close to drowning in a flooded helmet searched for clues in his spacesuit Wednesday, in hopes of understanding the unprecedented water leak.
Space Exploration
Jul 17, 2013
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The cosmic detector that required a series of difficult spacewalking repairs is back in action.
Space Exploration
Jan 31, 2020
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A spacewalking astronaut added to the millions of pieces of junk orbiting the Earth on Friday, losing a small mirror on his sleeve as soon as he emerged from the International Space Station for battery work.
Space Exploration
Jun 26, 2020
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With more private spaceship traffic expected at the International Space Station in the coming years, two spacewalking US astronauts installed a special parking spot for them on Friday.
Space Exploration
Aug 19, 2016
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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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A NASA astronaut said Tuesday that he pulled out of a spacewalk this week because of a pinched nerve in his neck.
Space Exploration
Aug 24, 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