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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9
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1answer
3k views

What would happened if the ISS was depressurized while astronauts were sheltering?

The International Space Station tries to maneuver to avoid debris, but sometimes (and it has actually happened) they discover something that could hit them too late to move, so they shelter in Soyuz ...
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Air temperature and humidity inside the ISS

The International Space Station being an artificial habitat for humans; it seems reasonable to assume the air temperature, and humidity levels are maintained at well-defined levels. What are the air ...
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How well did the Orbital Sciences' Cygnus cargo craft perform?

Regardless of the GPS discrepancy, Cygnus completed its mission. How well did it do, and, does SpaceX now have a proper competitor?
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7k views

Price per kg of cargo delivery to ISS

The nice wikipedia comparison table of space station cargo vehicles doesn't provide any hints on the price per kilogram for the cargo delivery to the ISS. As it is usual with price per kilogram ...
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702 views

ISS attitude during docking

The ISS is using the Control Moment Gyroscopes to maintain its attitude (the Cupola pointing towards Earth). That means the ISS is slowly rotating with respect to distant stars. What happens during ...
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252 views

What is the exercise regimen under the SPRINT program?

NASA says (emphasis mine) Current exercise countermeasures on the International Space Station (ISS) are insufficient to prevent muscle atrophy, cardiovascular deconditioning and bone loss ...
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How is the ISS equipped to deal with the outbreak of a contagion?

Suppose one of the astronauts was a carrier for a disease that did not show up in the medical testing prior to flying up to the ISS. How would the outbreak of this contagion be dealt with?
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Do astronauts aboard the International Space Station (ISS) actually use their legs?

The European Space Agency writes to say ◾The applicant must have the normal range of motion and functionality in all joints. Historically, IMHO, astronauts came from a flight/test-pilot background....
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What is the procedure if communication with the ISS is lost for an extended period?

Between ground control and the ISS there is the occasional short communications loss which they are obviously able to deal with, but is there a procedure to follow if the communication is lost for ...
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Is there no physical security in space, other than being in space?

I saw Gravity the other day and while visually and emotionally compelling, and besides the liberties taken with orbits, something else struck me as unrealistic, but I'm not sure if it is or isn't:...
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What would happen if a mutiny occurred on the International Space Station?

Historically, mutiny has often occurred in close-quarter situations. While the International Space Station (ISS) is not a military operation, the term mutiny is often used to refer any sort of ...
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1answer
225 views

Will Earth, ISS, or Tiangong be the first habitat closest to Juno during Earth Flyby 2013?

Just a fun question (+: Juno is approaching Earth for a gravity assist on her way to Jupiter. Her approach will bring her, at the nearest point, a mere 559KM above Earth's surface. ISS orbits just ...
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Does GPS work at ISS?

I've recently seen movie Gravity. The protagonist detaches from the shuttle and is hurled into space. The mission commander then asks her for GPS coordinates. This happenned while they were fixing ...
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Time to prepare for EVA out of ISS

How much time is needed to an astronaut on ISS to prepare herself for an EVA? Is this time so much different from time needed during Apollo missions?
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Why is the Pirs docking module being discarded?

According to a ISS operations/launch manifest on May 2, 2014 the Progress docked to Pirs, will undock, with Pirs attached to deorbit it. ...
21
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6k views

What is the cost of keeping the ISS in orbit

The plan for the ISS upon decomissioning is to deorbit the structure and let it fall into the ocean. I get that we do not want extra debris in orbit but I would think that leaving the structure in ...
32
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Will the ISS need more docking ports?

Currently the ISS has two basic segments, the Russian and US sides. The Russian side has 4 docking ports. Usually occupied by 2 Soyuz, 1 or 2 Progress freighters or an ESA ATV vehicle. You can see ...
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419 views

How much heat did the Sabatier hardware add to the ISS heat profile?

A sort-of follow-up to Why does the International Space Station produce so much methane? In 2010 Sabatier hardware was integrated into the regenerative environment control. The Sabatier hardware ...
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183 views

What are the criteria to select plants for study in space?

Me? I like roast aubergines cooked the way Mum makes it with mashed potatoes deep-fried, omelette, and roti. If I travel in space that would be the staple in my tiffin. In my on-board farm would loom ...
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Where should I look in ISS to find mouldy food?

Food is ubiquitous. All organisms known so far need food, and it is commonly believed all organisms unknown need it to. Size matters not - Eating is. Consumption continues ad infinitum. Failure to ...
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789 views

Could Magnetorquers be used on the ISS?

The way that the ISS manages it's attitude now is to use a set of reaction wheels for primary control, and occasionally firing small thrusters to allow the wheels to despin themselves. This isn't ...
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What's the maximum amount of time the ISS can go between resupply runs?

Typically a cadence of one resupply mission every couple months is maintained. If this cadence were to be interrupted for whatever reason, how long could, say, the current crew size of three members ...
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1answer
420 views

Cargo delivery from the ISS to Tiangong

Consider I have a 10 kg object I want to deliver from the ISS to Tiangong-1 station. The object can not go through the land and launch again cycle. Can any of the present day spacecrafts do the ...
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How would a centrifuge module's berthing system work on the ISS?

Although it's not very likely to be built, the idea of a centrifuge module attached to the International Space Station is taken seriously, and at least two have been proposed. I have in mind the ...
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What are the procedures aboard the ISS in the eventuality of a loss of a crew member?

So far, all the space exploration related events that resulted in Loss of Crew (LOC) took a complete crew, and as far as we're aware, no accident in space that resulted in loss of human life, be it ...
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1answer
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Does the orbit of the ISS decay?

Does the orbit of the ISS decay? I don't know much about the ISS, but I heard some rumors. The rumor I heard was that there is a very, very tiny atmosphere at the ISS orbit.
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is it possible to use mechanical pencil instead of space pen in ISS?

Is it possible to use mechanical pencil instead of space pen and pencil in International Space Station ?
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Do astronauts on board the ISS have a backup spacesuit?

Do astronauts on the International Space Station have a backup spacesuit with them so that they could use it in case of any malfunction with one of the spacesuits? If so, how many spacesuits does ...
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Are there any humanoid robots on board the ISS?

Are there any humanoid robots on board the International Space Station to help out its astronaut occupants? If not, are there any plans to send humanoid robots to the ISS?
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What kind of laptops do ISS astronauts use?

In many videos of the ISS, you can see tethered laptops all over the place. Presumably these are heavily customised for space. What kinds of customisation do they need? Are they off-the-shelf laptops ...
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3answers
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Could you take a Cessna from the ISS to Earth?

The shuttle had a empty gross weight of 172,000 lb (78,000 kg), and the only feasible way shedding the 27,724 kilometres (17,227 mi) per hour, of the relative speed of the ISS is Aerobraking. A four ...
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Decoding Russian ISS telemetry

While the American segment of the ISS has data published on-line (http://spacestationlive.nasa.gov), the same cannot be said about the Russian segment. It is known that telemetry is transmitted to ...
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1answer
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Do ISS astronauts have to be conversant in both English and Russian?

I've noticed that some of the American astronauts on the ISS can speak (at least a smattering of) Russian and similarly, some of the Russian cosmonauts are fluent in English. Is such bilinguality a ...
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663 views

What is the biggest number of astronauts in EVA at the same time ever reached in space history?

At present days, it's common to have two astronauts/cosmonauts in EVA at the same time during ISS maintenance (or experiments or when expanding the station). But there was a time when three or more ...
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How often are ISS computers (MDMs) replaced?

The electronic "heart" of the International Space Station are the Multiplexers-Demultiplexers (MDMs) located within & outside the pressurized modules. How often are they replaced? (An ideal ...
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How does the ISS adjust its solar panels?

Solar panels must be always exposed in the direction of sun to produce maximum power. Since the ISS orbits the Earth, if the panels are fixed they will not produce maximum power (often fluctuating). ...
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2answers
527 views

Could waste methane be recycled as propellant on the ISS?

Under standard condition methane burns with oxygen in stoichiometric ratio of 1:2 to liberate 891 kJ/mol of energy. Why is the ISS not making use of the methane, which is expelled as waste instead? ...
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590 views

Plumbing work of ISS?

On Earth (under the influence of gravity) a horizontal tube in which water is flowing may form a layer of air at the top of the tube (since less denser than water). But on the ISS (which experiences ...
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Is there a pre-published time that astronauts on the ISS will be available on Ham Radio?

The International Space Station has a Ham Radio station, and I've heard that the station frequently makes contact with people on the ground. I've seen the crew timelines, but they only publish what ...
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How are the astronauts in the ISS protected from solar flares?

The Sun emits electromagnetic radiation which may consist of UV, IR, X-rays and also the charge particles that are emitted from the sun which are harmful to humans. But during intense solar flares it ...
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How is the International Space Station protected against orbital debris?

ISS is at an altitude of about 400 km (approximately). But there will be some of space debris at that altitude (since some of the space debris orbits decay over time). So the debris has a probability ...
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427 views

How does ground control monitor the docking of ships to the ISS?

What kind of instruments are currently used, when ground control is monitoring a docking of new ship (or) segment to the ISS. Do they monitor it at all?
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1answer
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What coordinate system is used in space for navigation?

On Earth is possible to define the position of something using WGS, and the same system is used for navigation. What is used in space instead? Are different systems used for Earth-orbiting objects (...
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What happens to waste on the ISS?

I was thinking, and those little plastic bags that hold the astronauts' food have to go somewhere. Where do they go? Are they compacted into a big cube like on WALL-E, and sent out into space, or are ...
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Are there any safety procedures in place on the ISS in case of puncture?

The ISS is a huge (relatively) satellite which, according to NASA, is longer than a football field. I am curious about what would happen if the station's skin was punctured - perhaps by a careless ...
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Is any space station planned to be put in orbit in decade 2014-2024?

ISS will be closed by 2020. Are there any other space stations planned to be put in orbit in decade 2014-2024 that have really chances to be built?
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Did the ISS have to adjust its course when the SpaceX Dragon capsule was detached?

We had this question which discussed if space craft had to be corrected in their orbits from the movements from the people inside. (No as their net movement cancels each force out) Following on from ...
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How does astronaut activity from within affect a spacecraft?

Can physical activity from within a space craft affect it somehow? For example if somebody on the ISS performs repairs involving a lot of hammering, would it perhaps affect the station's orientation a ...
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Washing clothes in space: are there any technical challenges?

Currently, the ISS is resupplied with fresh clothes from the Earth. I remember reading a report on NTRS stating that the requirements for fresh clothes proved to be much higher than expected. Thus, ...
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The Russians recently tested a new launch trajectory that goes to the space station in about six hours. What allowed for the difference?

According to this article, Russia recently tested a new launch trajectory that shaved over 45 hours off their normal flight time. What allowed for this difference? Doesn't it seem like the shortest ...