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.

Filter by
Sorted by
Tagged with
4
votes
1answer
54 views

What are the key dimensions of the new IDA docking ports on the ISS?

I'm building a 3D model of the power and propulsion module of the Lunar Gateway, and I'm trying to establish a few dimensions so it's easier to make it accurate. It seems from the artwork that it uses ...
5
votes
1answer
81 views

Is the BEAM module as good as a rigid module in terms of radiation/thermal properties?

It seems that NASA is going to stick with the BEAM module on the ISS for quite some time, and is currently using it for storage. That's pretty cool. However, I was wondering if the BEAM module could,...
17
votes
2answers
629 views

What caused the ISS's sudden loss of altitude in January 2015?

This image from Heavens Above that @PearsonArtPhoto links to in this answer shows the orbital altitude of the International Space Station: In general, the ISS altitude decreases gradually with time ...
4
votes
1answer
105 views

What happened to 2 of the 3 radiators on P6 on the ISS?

Source: nasa.gov; modified What happened to 2 of the 3 radiators on P6 (solar array) when P6 was moved from Z1 (the top) to its final position on the port side? Initially I thought 2 were removed ...
13
votes
1answer
3k views

What is Earthy controlling in the ISS cupola?

ScienceAlert.com's Astronauts on The Space Station Liked SpaceX's 'Earthy' Toy So Much They Kidnapped It shows a series of photos of Earthy, the new plushy member of the ISS crew. In the photo below ...
5
votes
1answer
177 views

Does the ISS yaw in orbit? And if so, why?

A NASA ISS reference guide (PDF; 37 MB) explains the use of reaction wheels -- Control Moment Gyroscopes (CMGs) -- to control the station's attitude/orientation. My understanding is the station is ...
8
votes
2answers
299 views

Could the ISS stop rotating wrt the stars for a few days, then start again?

Suppose for some reason it was particularly advantageous to stop the ISS from rotating once per orbit, so that it maintained a constant attitude with respect to the stars (or the Sun) instead of with ...
7
votes
1answer
91 views

ESA's contribution to ISS: what has succeeded the ATV?

ESA's ATV cargo spacecraft was built and flown as part of ESA's contribution to the ISS operating cost. This program has ended. What has replaced it? Has ESA's financial contribution increased, or ...
2
votes
1answer
67 views

Feasibilities and challenges of these Orion + commercial lunar lander scenarios? [closed]

Suppose that US politicians want to fund a moon mission without SLS, using only hardware that is working now in 2019, using Orion together with some future moon lander supplied by the private sector. ...
8
votes
3answers
442 views

Can we detect the projected ISS shadow on the earth surface

Looking at an ISS transit picture: I started wondering wether we could see the ISS shadow passing on the earth. My intuition tells me that it would be impossible with the naked eye, but do we have ...
8
votes
2answers
3k views

What is Astronaut Sunita Williams wearing on her wrist?

The most recent installment of NPR's Brave New Workers A NASA Astronaut Stays In Orbit With SpaceX And Boeing (article & podcast) covers Astronaut Sunita Williams extremely cool new job. She's ...
14
votes
1answer
358 views

How precisely do we know mass of the ISS?

Everyone knows that in space, every gram counts. Knowing how much mass an orbital object has is necessary for precise motion calculations. So how precisely do we know the mass of ISS? I'm sure we can ...
4
votes
2answers
496 views

How are the silicon PV cells constructed in the ISS's solar panels? Are they as flexible as they appear here?

My understanding is that the ISS's solar panels are silicon and double sided to maximize bang-for-the-pound (average power per kilogram transported to orbit). See Are the ISS US Segment solar arrays ...
17
votes
2answers
2k views

Are lithium batteries allowed in the International Space Station?

Lithium batteries have been restricted or forbidden on aircraft in some jurisdictions, after incidents of fires. Are lithium batteries allowed on the ISS? If so, why would the risk be considered ...
5
votes
0answers
38 views

ISS DMA vs C&DH?

The Early design of the ISS specified a global Data Management System (DMS) for operations and management of Station software-dependant systems. The DMS was based on ISO/OSI standards for ...
7
votes
1answer
299 views

How (the heck) do you replace a space station window in orbit?

The eoPortal document Cupola Observation Module of the ISS found in @Dragongeek's answer to What are the two orange tabs stuck on opposite edges of each window of the ISS cupola? has some interesting ...
3
votes
0answers
81 views

Is there dust on ISS and how do they do cleaning?

Where are humans there is normally dust. It likes any more or less electrostatic surface. Is there dust at ISS and do they clean it beyond using air filters in the air system?
8
votes
1answer
254 views

Can Astronauts really see firework displays from space?

ISS Expedition 59/60 astronaut Nick Hague tweeted: Sporting our red, white, and blue on @Space_Station!🇺🇸 Planning a “cookout” tonight. Beef patties, corn, blueberry cobbler, and lemonade are all ...
2
votes
0answers
50 views

How many of the “millions of colors” available to ISS astronauts do they use? (solid state lighting)

This answer to Why are these astronauts green? explains the new (now about 2 years old) solid state (LED) lighting modules being added to ISS interior lighting, replacing the fluorescent lights (see ...
8
votes
4answers
370 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 ...
6
votes
1answer
213 views

What language is the Russian segment ISS software written in?

I have heard that the ISS uses a Russian coding language for some of the systems and subsystems on the Russian segment of the ISS. What is that coding language?
3
votes
3answers
165 views

How large of an antenna would you need to connect to the ISS's WiFi network from Earth?

Supposing I wanted to connect to the ISS's WiFi network from the ground, how large of an antenna would I need to do so, and what kind? Would they need to increase the power on their end or use a ...
1
vote
1answer
1k views

How much energy would it require to get the ISS to the moon? [duplicate]

How much energy would it require to get the ISS around or on the moon? And how much fuel would that require? And how many cargo missions would that require? And if that is not worth it, would it be ...
5
votes
1answer
425 views

Does the ISS have any ability to detect or sense unexpected/unscheduled objects in close proximity?

In a recent science fiction movie there was a space station similar to the ISS, and it had a "proximity alert". This made me wonder; in the real world, does the real ISS have any capability to ...
0
votes
0answers
33 views

my height is 5 feet 1inch .i am an indian .i have got spectacles of shortsight . can i try for NASA after laser surgery? [duplicate]

My height is 5 feet 1 inch . I am an indian .I have high spectacle number . Can I try for NASA astronaut after laser surgery?
3
votes
0answers
126 views

Do astronauts on the ISS have to consciously keep their arms down?

After seeing many images of astronauts on the ISS sleeping, with their arms floating, and Chris Hadfield describing arms floating up and head titling forward How Do You Sleep In Space? | Video I ...
4
votes
1answer
556 views

Does ISS wobble north/south?

...or "How precisely does ISS face Earth with one side?" We know "ISS always faces Earth with one side" - "spins at 1 revolution per orbit" which accounts for staying quite precisely parallel to ...
0
votes
0answers
86 views

What kinds of activities experiment and procedures done on the ISS must be done in chambers vented to space?

This answer to the question in 3D Printing SE How is 3D printing done in space? says The first big space-specific issue is actually air quality. You can't just open a window to air out the molten-...
5
votes
2answers
172 views

How does methane waste produced by the ISS interact with our Atmosphere?

The ISS uses a Sabatier reactor to recover oxygen from carbon dioxide. This has an output product of methane. I would imagine that most methane that enters our atmosphere at ground level only reaches ...
4
votes
1answer
160 views

What's this mini-cupola-looking object in this photo from the ISS?

(I went through this exercise for my own benefit, so I figured I'd post it) Recently stay-extended astronaut Christina Hammock Koch posted this image to Facebook today and the object indicated by the ...
4
votes
1answer
61 views

Is there an archive/database of ISS telemetry over time?

I'm trying to find a database of the ISS's telemetry (specifically, its pitch and yaw) over time. All I've found so far is live streaming, like http://www.telemetry.space/, which gives the realtime ...
1
vote
0answers
25 views

Does energy created from the crews mandatory exercise get used for powering parts of the ship [duplicate]

As the question states, I am wondering if energy created from for example a cycling machine get used for anything?
101
votes
6answers
20k views

What makes Ada the language of choice for the ISS's safety-critical systems?

We have it on good authority that Ada is widely used for "safety critical software" on at least the US side of the International Space Station. Of all the possible languages to choose from, what are ...
10
votes
3answers
618 views

How close is the ISS to a closed system, in terms of carbon, hydrogen, and oxygen?

I found this diagram of the ISS ECLSS material flow and noticed the $CO_2$ being vented off the station. source Now, I understand this is outdated since they added a Sabatier reaction system to ...
6
votes
1answer
346 views

How well could the ISS attitude control system detect periods of astronaut activity?

The question Why doesn't ISS start to spin if people walk inside? is a good one partly because it has attracted several good, informative answers. One of them is particularly intriguing because it ...
2
votes
1answer
106 views

How far would the ISS need to be to keep it's attitude with the earth from tidal forces without needing control moment gyroscopes?

I believe the ISS uses control moment gyroscopes (CMGs) to always have the same side facing the earth. How far from the earth does an object the size of the ISS need to be tidally locked with the ...
4
votes
1answer
58 views

What format is a “TSA Ephemeris?”

I am working on software that needs to parse an ephemeris file for the ISS. However, I cannot find any documentation for the particular format I have. The only mention I found is in this ...
37
votes
2answers
13k views

What language is software running on the ISS written in?

What is the coding language used for the software used on the ISS? Is it NASA's own coding language, or is it something like C, or C#, maybe Haskell?
54
votes
1answer
6k views

Why use water tanks from a retired Space Shuttle?

In 2015, technicians entered the retired Space Shuttle Endeavour to remove the water tanks, with the goal of reusing these tanks on ISS. The space shuttle Endeavour is retired and on display at the ...
5
votes
1answer
96 views

What is the limiting factor for cargo throughput per launch to the ISS?

Given the high availability of ISS Commercial Cargo launches for NASA, it would seem that the aerospace stereotype of "mass reduction is paramount" may be outdated. What is the current limiting factor ...
1
vote
1answer
44 views

How does the JEM/Kibo connect to the “Porch Module”?

In this answer I saw Figure 35 of the encyclopaedic ISS Interface Mechanisms and their Heritage also shown croped below, and in this answer I see the second image (though an SE/imgur bug shows it with ...
6
votes
1answer
832 views

Supply of liquid oxygen (LOX) maintained on the ISS? Kept cold using “space”, or refrigerator?

One can transport and store oxygen more efficiently (volume and weight of tank) if it is liquid under the order of 1 atmosphere. Liquid oxygen (LOX) is kept cryogenic in insulated tanks for short ...
26
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 ...
6
votes
1answer
144 views

Are mechanical pencils used on the ISS?

I have read through this question ("Is it possible to use mechanical pencil instead of space pen in ISS?") and it seems that without specially made pencils, it's unlikely as there are better options. ...
5
votes
2answers
451 views

What area of the Earth can the ISS be seen from?

I use this to track the ISS: http://iss.astroviewer.net/ EDIT: This URL no longer works. It was a couple of maps that showed the position of the ISS. One close in and one zoomed out more. It was how ...
3
votes
1answer
99 views

Can the ISS boost maneuver engine be heard by the astronauts on board?

In the extremely cool demonstration video Demonstration of Acceleration Inside the International Space Station During a Reboost ISS Expedition 22 Commander Jeffry Williams says near the end at ...
9
votes
1answer
2k views

What do astronauts do with their trash on the ISS?

Astronauts often stay more than a year on the ISS, they produce trash like any other human. Is there like a limit that they may produce ever day or maybe some measures were put in place to reduce the ...
11
votes
4answers
7k views

Were any toxic metals used in the International Space Station?

Have any of the following metals been used in the ISS? Lead: used in some batteries, and in many types of solder. Mercury: used in some batteries, and in tilt switches (which I would expect have no ...
4
votes
1answer
77 views

How are electrical connectors on the ISS protected from humidity and contaminants?

Early concepts of Apollo had a single computer that was to be unplugged and moved between the CM and LM. This idea was soon abandoned because of contaminant buildup in the connectors: Electrical ...
5
votes
0answers
60 views

Are all DC motors on the inside of the ISS brushless?

Considering the number of motors on the ISS used in pumps, fans, actuators and robots, are there rules against brushed motors, motors with electrical brushes which can make particulate matter? Based ...