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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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43
votes
7answers
44k views

Can I see the ISS from the surface with the naked eye?

Can I see the International Space Station (ISS) from the surface with the naked eye? If yes, how can I determine that it really is the ISS?
39
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4answers
9k views

Are there any weapons in space?

We can break this down into two categories: For internal security purposes, does the ISS have any type of weapon on board? For global security purposes, are there any orbiting weapons (that we know ...
12
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3answers
3k views

Why couldn't Luca Parmitano just drink that water?

Of course, I am asking about the EVA incident where the Luca's spacesuit malfunctioned and his helmet filled up with water nearly drowning him. I'm really sorry, I am not assuming the mission centre ...
13
votes
1answer
777 views

Are the power systems on the US and Russian segments of the ISS similar/compatible?

Clearly there is some method of power transfer between the US Segment with the honking big arrays, to the Russian segment. But since the Russian segment is basically Mir 2 (Zvezda, and an FGB tug ...
12
votes
1answer
558 views

What are the windows on the Russian segement of the ISS made of?

Presumably the various windows on the different modules of the ISS are consistent on the different segments of the ISS. What are the windows on the Russian Segment made out of? Do they have special ...
18
votes
1answer
6k views

What materials are the windows on the US Segment of the ISS made out of?

Presumably the various windows on the different modules of the ISS are consistent on the different segments of the ISS. What are the windows on the US Segment made out of? Do they have special ...
17
votes
1answer
962 views

Is potable water in the American & Russian segments still stored separately?

This article writes to say An interesting fact is that the Russian and American segment water supplies can’t be mixed. The U.S. water uses iodine for bacteria control, while the Russian water uses ...
10
votes
1answer
2k views

Is water on-board space-craft (such as ISS) rationed?

An NIH abstract writes to say A daily water intake of 3.7 L for adult men and 2.7 L for adult women meets the needs of the vast majority of persons. Is water on-board space-craft (such as ISS, ...
9
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3answers
5k views

Does the ISS need more heating or more cooling?

While reading the recent question 'Do exercise machines on the ISS generate electric energy?', I got thinking all of the exerciser machines generate heat (heat energy). So yes all exercise machine ...
6
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2answers
1k views

Do exercise machines on the ISS generate electric energy?

I'm just curious, do exercise machines for weight lifting and cycling have electric generators built in them to charge International Space Station batteries, or it's all going to waste?
10
votes
2answers
3k views

How feasible would it be to move the ISS to the surface of the Moon to recycle its components in future?

I see it as an awful waste of energy in not only creating the International Space Station (ISS) components, but also in getting them into space to only decommission the station by letting it fall back ...
14
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3answers
2k views

What is so difficult about the ISS zero propellant maneuver?

Nazareth Bedrossian (from Draper Laboratory) et al. describe the ZPM in this paper. What I want to know is: Why is planning and executing the maneuver so difficult it had not been done before 2007? ...
15
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1answer
588 views

How many docking/berthing operations can a CBM port tolerate?

Generally the CBM ports were meant to connect new space station nodes together. The nadir port on Harmony (Node 2) has been used for more berthings than any other that I am aware of. As of Jan 2014,...
9
votes
1answer
642 views

How much crew time is required for visiting craft, at the ISS?

Looking at the first six months of 2014's launch schedule for spacecraft visiting the ISS we have: Jan 8 - Orbital Cygnus - Node 2 zenith CBM Feb 5 - Progress - Russian segment port Feb 22 - SpaceX ...
16
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2answers
2k views

How are dead animals disposed of on the ISS?

After reading the question Have any animals that have been studied onboard the ISS come back alive?, my first thought was this: what about the ones that don't live? It would seem that this wouldn't ...
29
votes
1answer
5k views

Have any animals that have been studied onboard the ISS come back alive?

Obviously, I mean any living organisms from the animal kingdom except humans, sent to the International Space Station (ISS) for the purpose of scientific research. I also don't mean if they did the ...
13
votes
1answer
470 views

How much delta-v can be achieved by venting the ISS atmosphere?

A sort-of follow-up to What do the astronauts do whilst the air-lock cycles? The ISS fact-sheet writes to say Pressurized Volume: 32,333 cubic feet (916 cubic meters) Elsewhere on the stack are ...
11
votes
1answer
2k views

How many airlocks does the ISS have?

In this context, I mean, a way to get out of the station, without depressurizing the entire station. The obvious ones are: Quest airlock on Unity (Node 1). Pirs (DC-1) airlock Does Poisk (DC-2? Or ...
13
votes
1answer
2k views

What is the cause of discoloration along the edges of the Quest Joint Airlock thermal cover?

I've noticed this discoloration / stains / burn marks along the edges of the Quest Joint Airlock thermal cover on the hatch before, but they seem even more pronounced and contrasting with the cover's ...
8
votes
1answer
671 views

Why did NASA assess 3 separate and over 6 hours long EVAs are needed to replace a single failed Pump Module (S1 PM)?

I'm currently following US EVA-24 with Rick Mastracchio (EV1) and Mike Hopkins (EV2) tasked to replace a failed Pump Module (S1 PM), one of two external pump modules of the US section of the ...
11
votes
1answer
462 views

Do astronauts take any pills to battle bone density loss?

Is the effect of micro-gravity on bone structure similar to osteoporosis? If so, do they often take simple pills like calcium or more advance medicine such as ones listed here? Lastly, are they ...
7
votes
1answer
161 views

What is the airlock on Rassvet meant for?

When NASA launched Rassvet (DCM - Docking and Cargo Module) on a shuttle, it carried a small airlock attached. NASA was under contract to deliver 1.4 tonnes of equipment for the MLM Nauka. Nauka, ...
12
votes
1answer
864 views

With one out of two Thermal Control Systems on ISS malfunctioning, how long can Loop B keep up with increased load?

International Space Station (ISS) is in trouble again. One of the two Thermal Control System (TCS) loops (Loop A) is malfunctioning due to a troublesome Flow Control Valve (FCV). This is nothing new ...
12
votes
1answer
921 views

What kind of biological research does the ISS do?

As per this link, the International Space Station (ISS) continues to provide research in such fields as biology. What kind of biological research is being done on the ISS, considering there is no life ...
6
votes
3answers
632 views

Why such a large gap between ISS construction and inhabitation?

I was studying this NASA infographic, and noticed something interesting on the timeline portion: It looks like the station was originally assembled in late '98, while the 'first crew' didn't arrive ...
11
votes
1answer
559 views

When a new module is added to the ISS, do they still do the “Shake” test?

I recall reading, that when Mir would get a new module added, after it was docked, a cosmonaut would stand in, feet on one wall, hands on the other, and try to shake it, to ensure the docking seal was ...
9
votes
1answer
377 views

On Mir, Zarya, or Zvezda, do docking ports consume space inside the module?

I have been asking about why Zarya, Zvezda have the number of docking ports they have, and whether more will be needed. This got me thinking about what the inside of the docking module looks like. ...
3
votes
1answer
463 views

Why did Zarya (FGB) come with a single docking port?

Initially, the Russians did not wish to launch the FGB (Functional Block), now named Zarya, which was the first ISS component launched. But the US wanted it, so they could launch a US component sooner....
9
votes
1answer
479 views

Why were the docking ports removed from Zvezda? (Service Module)

Zvezda, the third ISS module, (I think it was Zarya (FGB), Node 1, and then Zvezda) known as the Service Module was actually built as a spare for Mir and was originally to be the core of Mir-2. But ...
3
votes
0answers
119 views

What is the temperature inside the International Space Station? [duplicate]

What is the temperature inside the ISS? How is the temperature regulated? I have seen a few clips of the ISS and the crew was wearing just T-shirts and shorts, so the temperature must be normal.
12
votes
1answer
386 views

Has dependent one-carbon metabolic pathway been successfully linked to ocular health of astronauts?

NASA is pretty active in investigating deteriorated vision issues of astronauts that, I guess, are most frequently linked to the loss of intracranial blood pressure due to microgravity with their ...
18
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1answer
1k views

Why are three cosmonauts required to move a Soyuz?

The opening paragraph of this article caught my eye*: Three space station crew members put on spacesuits and boarded their Soyuz spacecraft Friday for a short trip to relocate the capsule to a new ...
11
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1answer
2k views

Could a harpoon-like gun be used by an astronaut to stop drifting away from a ship?

I saw the movie Gravity. Spoiler alert, hover with your mouse over the yellow bar below to reveal a part of the movie's plot: Why can't they have a gun kind-of thing with a string/rope? One end of ...
9
votes
1answer
2k 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 ...
23
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2answers
23k views

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 ...
8
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1answer
147 views

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?
9
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1answer
6k 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 ...
10
votes
1answer
649 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 ...
7
votes
1answer
233 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 ...
30
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1answer
2k views

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?
18
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2answers
2k views

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....
21
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2answers
2k views

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 ...
62
votes
3answers
8k views

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:...
39
votes
1answer
6k views

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 ...
7
votes
1answer
212 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 ...
8
votes
4answers
391 views

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 ...
10
votes
2answers
903 views

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?
7
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1answer
1k views

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. ...
20
votes
2answers
5k 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 ...
28
votes
2answers
8k views

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 ...