Questions tagged [iss]

Questions about the International Space Station, a habitable man-made low Earth orbit satellite whose first component was launched in 1998 and used to conduct experiments for a wide variety of research fields in a microgravity environment.

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New spin on laundry day: How will ISS cope with washing machine vibration and angular momentum?

Although the ISS currently has no laundry facilities, NASA’s Glenn Research Center sponsored a washing machine design contest to do the drudgery during spaceflight. Plans have been made for testing a ...
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How many hours/week on the ISS is spent on science vs maintenance?

This was asked in 2016 : Does ISS crew exercise time count toward their X hour work week? The answer as of 2016 was 40 hours / week for a crew of 6. But as noted there, when the crew size increases to ...
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Why do EVA suits have legs?

Why do EVA suits have legs? Planetary exploration suits (PES) obviously need legs. Spacesuits with legs are “a classic icon of human space exploration” and a requirement for mobility. https://www....
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Pressurized gloves have significant limitations. What are objective advantages/disadvantages of the alternatives? [closed]

Conventional EVA suits suffer from mobility and tactile sensory limitations due to their pressurization. Any articulated container which changes volume with motion will resist motion if pressurized. ...
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What are all these packages attached to a side module of the ISS? How did they all get there?

Ars Technica's New images of the International Space Station reveal that it is still a jewel includes the photo below and I've added a view of a side module with a collection of various rectangular ...
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Oxygen Generation System

Is there any possible failure that OGS (oxygen generation system which ISS has) can overproduce oxygen in a spaceship? Just wondering the possibility how can spaceship explode by themselves without ...
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803 views

World's most expensive space cookie? (What am I looking at, object identification, rivets and all)

On the NPR page Our Favorite Things, Short Wave-style there is an image whose caption reads Earlier this month, crew aboard the International Space Station received a a novel item in their cargo re-...
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396 views

Shortest stay at the ISS once continuous operations and regular crew rotations began? How does Maezawa (planned) 12 days compare?

Confused about Yusaku Maezawa's first "standing on the shoulders of giants" PR photo on the shoulders of Elon Musk in 2018 then launching to the ISS aboard Soyuz, I found that the article ...
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Which S-Band ISS antenna stopped transmitting to TDRS and was replaced during the recent 2021-12-02 EVA?

CNN's says: Marshburn and Barron began their spacewalk at 6:15 a.m. ET, and it's expected to last for about six and a half hours. The team will replace a malfunctioning communications antenna. Live ...
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How long does it take for the ISS astronauts to isolate a module

In the chosen answer for What size hole in the International Space Station would be catastrophic, we find that a 0.6cm hole would depressurize the ISS to life threatening levels in 14 hours. A 20cm ...
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What size hole in the International Space Station would be catastrophic?

I was reading "Russia threatens criminal charges against a NASA astronaut" in arstechnica.com. Somewhere in the article it says: " At the time, a 2 mm breach was discovered in the ...
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What do "initiate dragon safe haven" and "close all centerline hatches" and "next two crossings" mean?

CNN's video Hear warning to ISS after Russia's dangerous missile test plays an audio clip of a voice communication from NASA Houston ground control to the ISS crew, with the message: ...we will need ...
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What factors have enabled the increase in ISS crew?

A glance at the ISS expeditions wiki seems to show that the ISS's crew complement has been increasing in recent years, from between 3 and 6 to 6 to 11 - a boost to the science productivity, I'm sure. ...
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What generates static charge on the ISS?

There are two plasma contactors on the ISS Z1 truss, designed to neutralize static electrical charge of the space station. What generates static charge on a spacecraft? If it is picking up charge from ...
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What are the operational details of the Canadarm Latching End Effectors?

There are numerous pictures of grapple fixtures and LEE available. I can appreciate how the wire snare works to snare the center pin of the grapple. But I’m foggy on how the location cam/arm ...
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Can an ISS module survive reentry?

Nasa is making plans to de-orbit the ISS safely over the pacific ocean, this eventually leads to the question of whether or not an ISS module can survive reentry (survive meaning it is recognizable ...
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131 views

Is pre-deorbit explosive disassembly of the ISS utilising propellant a useful way to reduce impact debris?

The ISS could be disassembled post retro burn to provide smaller pieces for burn-up. If the hull space were filled with a stoichiometric mix of propellant from the deorbiting vessel post-burn, it ...
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Deorbit of ISS is a unique event. Are there plans for scientific observation?

The ISS deorbit will be unique. Not only because of its mass, but because the time, location and observing conditions can be accurately chosen. Instruments could be placed for detailed observation. ...
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When the ISS is de-orbited, what is the likely mass of the largest impact fragment?

Are there plans to modify the ISS prior to de-orbit to reduce fragment size or number.? For instance a "rapid planed disassembly" post burn ?
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If you release a tool outside the ISS in space will it remain at the "same" place forever?

If an astronaut doing a repair outside the International Space Station (ISS) gently lets go of a tool into space, will it keep "flying" (orbiting) at the same spot relative to the ISS where ...
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Can ISS trash be used as reaction mass for orbital maintenance

There have been a number of videos posted about trash being hand-pitched out the back of the ISS. This seems like a waste of potential reaction mass, especially since it cost $20,000/kg to get it up ...
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What to do until the hearse arrives: is there a designated morgue on ISS?

When I have asked, every commercial ocean-going vessel I’ve been on has provision for a refrigerated morgue. In the good old days, it was a cannon ball at your feet and six feet of sail cloth with the ...
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Are the original ISS solar panels single or polycrystalline silicon? What about the new ROSA roll-out arrays?

Most silicon photovoltaic arrays on Earth are silicon (no layers of III-V material for added efficiency) and they are grown as polycrystalline silicon rather than sliced from single crystal silicon ...
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Exterior "running lights" on ISS?

In Scott Kelley's memoir "Endurance," he describes how challenging it is to navigate the exterior of ISS when in Earth's shadow, and he mentions that his Russian colleagues would just stay ...
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What keeps the pressure stable inside the ISS?

I'm doing research on life support systems for the design of a Martian scientific base, and I'm having trouble finding information about the specifics racks that keep pressure stable inside the ISS. I ...
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How is it possible that the windows on the ISS mostly face Earth only? [duplicate]

In this article astronaut Clayton C. Anderson states that on the ISS the windows "mosty face Earth, which means that it is only possible to see the stars at the very edges of the windows, and ...
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Are there chances to get a Hubble + ISS Moon transit picture?

I have seen these cool transit pictures where ISS is transiting the moon ISS is transiting the Sun Hubble is transiting the moon I even saw picture of ISS Sun transit during solar Eclipse Tiangong ...
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When docked, do Dragon solar panels contribute to ISS mains power?

What it says on the tin. Does a docked Dragon trunk section contribute to the ISS's batteries? I'm aware it would probably be minimal though due to orientation and occlusion of the panels, and when ...
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Will the International Space Station be able to see the Falcon 9 (Inspiration4 launch)

Will astronauts aboard the International Space Station be able to see any part of the Inspiration4 flight of the Falcon 9 during launch and/or during orbit?
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Was the Isp = 11,000 seconds Neumann Drive tested on the ISS? Did it work? How well did it perform?

In 2018 answers were posted to What is Australia's Bartolomeo platform? When does it arrive at the ISS; when and where will it be attached? Will the Neumann drive start testing aboard the ISS ...
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Which two spacecraft are being shown disconnecting here, and what was the connection for?

The new Wall Street Journal video China's Answer to the Aging International Space Station: The Tech Behind Tiangong | WSJ shows what looks like it might be a fuel transfer connection decoupling at <...
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What orbit-raising propulsion system will Tiangong use, and how does it differ from that of the ISS in terms of performance and technology?

The new Wall Street Journal video China's Answer to the Aging International Space Station: The Tech Behind Tiangong | WSJ emphasizes after 03:26 that Tiangong's ...
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Why would the US need it's ISS partners to agree to extend its mission? Is it strictly money, or is it also resources, or even more complicated?

Space News's Space agencies support ISS extension as NASA warns of space race with China says: COLORADO SPRINGS — NASA Administrator Bill Nelson said he remains confident that Russia will remain a ...
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What is this complicated experimental apparatus being pulled out of another complicated apparatus inside the ISS?

The new NASA video Science Launching on SpaceX's 23rd Cargo Resupply Mission to the Space Station a bit after 01:20 shows a large experimental apparatus which looks ...
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ISS Live Views of Earth on Nasa's EHDC Camera appear to be retrograde orbit

If the Orbit of the ISS is Prograde and Synchronized with the same orbit as the Earth, would not the Live EHDC views motion appear Stationary?
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What device did Oleg Novitsky insert into the hatch of the Nauka module before opening it? How does it work? When did it arrive to the ISS? [duplicate]

The Roscosmos Media video Первое видео из модуля «Наука» (google translates to: "The first video from the module "Science" (Nauka)) shows Roscosmos cosmonauts Oleg Novitsky and Pyotr ...
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Zebulon Scoville "looked up at the video monitors and saw all the ice and thruster firings." Exactly what ice did Scoville see? Why ice? Where?

Gizmodo's The ISS Backflipped Out of Control After Russian Module Misfired, New Details Reveal quotes Zebulon Scoville, the NASA flight director in charge at the time: “And so at first I was like, ‘...
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Does extended microgravity increase the rate of kidney stones in astronauts? Do these lead to medical complains/discomfort while still in space?

This answer to What are the main impacts on the body of an astronaut exposed to long term zero gravity? mentions that the increase in bone loss due to extended periods of time in microgravity can not ...
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What are the contingency plans for lost ISS attitude control?

Apparently the Russians had a mishap with their new ISS module. The module fired its thrusters after docking and caused attitude control loss The Russian "Nauka" module linked to the space ...
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What's the farthest an ISS astronaut gets from the station's center of mass during routine activities? At 0.5°/s what centrifugal effects are there?

This answer to Are there really “Dead End” signs on the outside of the International Space Station? won't be helpful here since for the purposes of this question spacewalks aren't part of routine ...
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858 views

Do astronauts aboard ISS notice a change in ISS orientation?

The ISS was rotated by Nauka today. As far as I understand, this took quite some time, i.e. the ISS was not simply rotated by 45 degrees within a few seconds. I know that the ISS usually rotates once ...
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What is the definition of a "spacecraft emergency" at the ISS, and what is the response to it?

Several sources including the Orange County Register are reporting that a "spacecraft emergency" was declared today onboard the ISS due to the new MLM module's uncommanded thruster firings ...
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What is "Mission Alpha" and why does Expedition 65/66's Thomas Pesquet's tweet have the #MissionAlpha hashtag?

Expedition 65/66's Thomas Pesquet's tweet says: So long DC1! After almost twenty years of service, instead of getting a medal First place medal, one of the @Space_Station's oldest @roscosmos ...
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Did the ISS just turn upside-down? Nauka docking attitude maneuvers; did the cupola near pointing zenith and therefore show only black sky w/ stars?

This answer to Is the ISS going to yaw and assume the XPOP attitude for Nauka docking? contains lots of information on the attitude trajectory in yaw-pitch-roll space, but from those I can't envision ...
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Why aren't ISS attitude control thrusters a "tool" picked up by robotic arms?

Since ISS is an evolving structure which center of mass flucuates in position depending on added or removed modules, could Canadarm or latest European robotic arm be used to manipulate attitude ...
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Can a spacecraft be "too large to dock" to the ISS?

A comment below Is Starship planned to fly directly to the ISS without first stage? Is it even possible? says: to my best knowledge, the Starship will never be near the ISS. it is too large to dock ...
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Is the ISS going to yaw and assume the XPOP attitude for Nauka docking?

I noticed this in the launch of Nauka MLM to the ISS. (Previously I had assumed it would dock in a similar manner to Progress or Soyuz, that is coming from behind and underneath - this says the ...
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Is the zero gravity experienced in ISS the "artificial" kind?

I always wondered about the following: An astronaut floating inside a spaceship that is far from Earth or any other other planet will experience true zero gravity because there is negligible ...
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How will Nauka be configured on the ISS? In which direction will it extend?

The NASA Johnson Space to Ground: At the Midpoint: 07/02/2021 video this week from Mexico City to promote Espacio a Tierra includes the following: Also launching to the Station, a new multi-purpose ...
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How does ECOSTRESS measure both temperature and emissivity of the Earth's surface simultaneously? (Science package aboard the ISS)

The This Week at NASA video A U.S. Commercial Spacecraft Departs the Space Station on This Week @NASA – July 2, 2021 includes the following quote: Data from NASA’s Ecosystem Spaceborne Thermal ...

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