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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32
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1answer
4k views

Why does the ISS rotate exactly once per orbit?

Looking at the HDEV experiment, one can see that the orientation of the ISS is always the same with respect to the Earth. This means that the ISS must rotate exactly once per orbit (like the Moon ...
12
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1answer
3k views

When does the ISS have a loss-of-signal?

The ISS has a camera mounted streaming live video from space (HDEV). From time to time, there is a blue screen visible, which is noted to be during times of "loss of signal". What exactly defines a "...
3
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1answer
215 views

Solutions to Ongoing Problems on the Solar Panel rotary joints

What are the causes of the damaged SARJ on the ISS? This occurred back in 2007, and endangers the lives of astronauts. Also, what are the solutions to this problem. Does anyone know what types of ...
1
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1answer
288 views

Parachute on the ISS [closed]

If a large parachute were attached to the ISS, how long would it last? I know that there is very little atmosphere where the ISS orbits, but also that the atmosphere is thick enough that it needs a ...
3
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1answer
585 views

What is the composition of breathable air on the International Space Station? [duplicate]

On the ISS, the breathable air has to include oxygen, but it can't be pure oxygen for safety reasons. So what is the composition of breathable air on the station?
8
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2answers
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Why only 2 male astronauts for the Year In Space ISS Mission?

I wonder why the space agencies chose only 2 males for the Year In Space ISS Mission? I think it would have made more sense to have at least 1 male and 1 female astronaut, or more preferably 3 male ...
10
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3answers
997 views

How is the ISS helpful for launching cubesats and minisats?

The ISS space station orbits at an inclination of about 50 degrees. That's in between polar orbit, which would be useful for Earth observations, and the ecliptic which would be useful for synchronous ...
24
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4answers
6k views

How quickly could a space agency get to the ISS in case of an emergency?

Here's the situation: The ISS suffered from some kind of catastrophic failure. The crew is unharmed, but the nature of the failure includes: The destruction of any present vehicles capable of ...
5
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1answer
570 views

How is time split on different activities on ISS?

I'd be very interested to hear what exactly do ISS crew members spend their time on — the split between different major activities. Yesterday I saw someone on this site mention that close to 30% of ...
7
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1answer
534 views

What are the ISS moments of inertia around design axes?

I'm wondering where one can find more or less up-to-date data on the inertia matrix of the ISS. A full historical dataset would be great, of course. A discussion of error margins is desirable.
14
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2answers
1k views

When was the last time 9 people were on the ISS?

Currently (September 4, 2015) there is a complement of 9 people aboard the ISS. This will change a week from now, when 3 of those people return to Earth. When was the last time the ISS had 9 people ...
4
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1answer
307 views

Could the ISS be spun to simulate Phobos' gravity?

Before a human crew goes to Mars' moon Phobos or to even lower mass asteroids, could a long stay at such an object be simulated gravitationally in the space station? I've heard that the ISS people don'...
5
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2answers
358 views

Soyuz TMA-18M ISS rendezvous: expedited 4-orbit vs regular 34-orbit - How does fuel usage compare?

Follow up to this question: Why will Soyuz TMA-18M take two days to reach the ISS?. Clearly the expedited rendezvous is cheaper in terms of time. However I was wondering how fuel usage compares. Is ...
38
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4answers
4k views

When the ISS accelerates, do the astronauts feel it?

The ISS has thrusters to avoid debris and to combat orbital decay. Do the astronauts feel the station accelerating? Do they have to hold onto something and is it the same when they rotate the station ...
8
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1answer
310 views

What is/was the point of Robonaut 2? Has it accomplished anything?

I remember being really interested in the Robonaut project when it was first announced, and thinking how cool it was when it was finally launched to the ISS. Since then, I've heard little about the ...
21
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2answers
3k views

Why did Soyuz TMA-18M take two days to reach the ISS?

Typically, a Soyuz crew vehicle takes 4 orbits to reach the ISS, but the Soyuz TMA-18M took 34 orbits or 2 days to reach it. Why is there so much variation from typical missions?
13
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4answers
11k views

How do astronauts take pictures from outside the ISS?

I've seen multiple images taken from outside the Space Station like this one or this one and even timelapses from far outside showing the solar panels moving over time. Is there a satellite ...
24
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0answers
8k views

Why is artificial gravity not included on space stations? [duplicate]

I'm wondering why artificial gravity is not included on the ISS, or on the currently planned OPSEK. There are long-term health effects of weightlessness, which would be avoided, using artificial ...
13
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1answer
843 views

How would civilians send snacks to the ISS crew?

Today I saw a video in which ESA astronaut Samantha Cristoforetti teaches us how to make pitas in space, and invites us to try to make them at home. I understand that much of the food on the ISS is ...
2
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2answers
923 views

What are the steps between rocket launch and docking to the ISS?

This question focus on space missions docking with the ISS. On this youtube video, the process to rendez-vous with the ISS is described. If I understand correctly, it consists in taking of, place the ...
11
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1answer
758 views

Growing food in space

I can't find info on NASA site, but saw a picture of romaine on ISS and am wondering how it maintains its shape in zero-gravity- why doesn't it spread out, what makes it grow up...?
8
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3answers
811 views

Why do we have so many different spaceships to refill ISS?

To refill the ISS, many spacecraft have been or are used The shuttle (retired for obvious reasons) ATV (retired) HTV (will be retired) Progress Soyuz Dragon Cygnus CST-100 (future) Dream Chaser (...
22
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2answers
2k views

Will a Dragon v2 ever bring 7 astronauts to the ISS?

The Dragon v2 has 7 seats whereas the Soyuz only has 3. But the Soyuz uses all 3 seats for astronauts/cosmonauts to bring to the ISS. I suspect that Dragon v2 will bring 3-4 people to the ISS in one ...
7
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2answers
2k views

What is the ISS maximum altitude?

I see two threats to the ISS as its altitude goes up: Cosmic/solar radiation, which would endanger the crew and the electronics aboard. Orbital debris, which would have higher relative speed and ...
10
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1answer
864 views

Space Station Battle: Could the Almaz gun depressurize the ISS?

Background The second Soviet Almaz military space station both had and tested an externally-mounted autocannon, specifically a Rikhter R-23 (according to some sources). It had 32 rounds of ...
8
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1answer
450 views

What CAD system do the ISS designers use?

What CAD software (Autocad, CATIA, Solid Edge etc.) is the ISS designed using? Or has this changed over time / modules? With such careful mating of components needed in very constrained environments ...
7
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2answers
2k views

How do astronauts sleep in zero G?

Perhaps this is a strange question but I've always wondered how astronauts, particularly those aboard the ISS, sleep in zero G. Do they just hang out in "space" or do they have beds they strap ...
15
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2answers
7k views

Do astronauts get Netflix on ISS?

I've been wondering about the internet connection on the ISS, and how it's used. We were talking in chat about astronauts personal belongings and free time, and it made me wonder about how they use ...
8
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1answer
231 views

Will any of the COTS providers be able to perform expedited rendezvous with the ISS?

Russians have been doing expedited four-orbit rendezvous with the International Space Station (ISS) for quite a while now, and when it works, its benefits are apparent; You get there before you'd even ...
5
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1answer
189 views

ISS: Procedure in case of collision warning

In case of collision warning occurring to the ISS, if ISS can't be moved the procedure is to go to a Soyuz and wait. Can anyone gives details about the procedure? Is the Soyuz hermetically closed ...
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1answer
609 views

Why does the ISS use longitude and latitude to specify its position?

I'm using an API from NASA on this URL: http://api.open-notify.org/iss-now.json It gives me the location of the ISS as a longitude and latitude. How can I find it's position in space?
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2answers
2k views

Do astronauts only perform spacewalks while the ISS is on the night side of the Earth?

Do International Space Station astronauts have to perform spacewalks only while its not facing the Sun directly? If so, I'm curious about the reason behind it. Is it only because they would be ...
6
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2answers
604 views

How was the airlock for the ISS' minisat launchers installed?

I assume that the crew in ISS can manipulate the minisats manually before they are launched, so they must be launched through some kind of airlock. Was this airlock designed for this purpose, or do ...
9
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2answers
1k views

By what methods can cubesats move from LEO to higher orbits?

If a cubesat is launched as secondary payload to LEO, what ways are there to put it in a higher orbit, for example outside of the van Allen belt to make a radiation experiment? The ISS launches ...
4
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1answer
177 views

Were the ISS Solar Arrays manufactured as a set?

The solar arrays used on the ISS were launched in 4 different launches. Starting in 2000 for the first array, used on the Z-0 truss, to 2007, 2008, and 2009 for the final three. Are all 4 of them ...
10
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1answer
4k views

Why does the ISS not use the most efficient solar panels available?

In this question, Geoffc's answer stated that the ISS solar arrays are about 14% efficient. Higher efficiency panels were available when these arrays were manufactured. Given the high cost per pound ...
8
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1answer
473 views

What is the difference in solar panel efficiency between Solar Impulse & ISS?

Solar Impulse is on target to circle the world. Presumably Solar Impulse has the most current and efficient solar cells available, while those on the ISS range between 5 and 10 years old. How do the ...
8
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2answers
2k views

Who can now resupply the ISS?

There are 4 major spacecraft that can supply the ISS. Progress, Dragon, ATV, and Cygnus. Of these 4 spacecraft, only the ATV has not had an issue in the last 8 months. ATV has stated they will not ...
16
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3answers
2k views

Does the ISS have zenith-facing windows?

I was looking at the NASA image of the day today, and it made me wonder about the windows on the ISS. I often see pictures of Earth taken from the ISS, but I was wondering if they had any windows that ...
6
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1answer
2k views

Total Mass of the ISS Solar Array

This document does a pretty decent job of detailing the ISS solar array. There's one part, however, that is sort of ambiguous and critical to an analysis I'm performing, and so I thought I might ask ...
2
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1answer
1k views

Why are space vehicles at 1 Atmospheric Pressure? [duplicate]

I recently read multiple sources that indicate human-occupied vehicles (Space Shuttle, ISS, Soyuz, etc) are all pressurized to 1 atmosphere of pressure (approx 100 kPa). Since I believe that people ...
20
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2answers
13k views

How long would ISS stay in orbit if it didn't get reboosts?

Apparently ISS is so close to Earth's atmosphere that it requires periodical boosts to stay in orbit. If the station were completely abandoned and it wouldn't get the boosts anymore, how long would it ...
10
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2answers
616 views

Does any site track the mass of the ISS?

Watching the daily ISS live broadcast from NASA the PRO mentioned the specific mass of the ISS complex (today) and what it would be when the Soyuz leaves shortly. One can find out the mass of each ...
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2answers
2k views

Can X-37B dock with the ISS

X-37 can fly in the same orbit as ISS but can they dock?
4
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1answer
420 views

Is China using same technology and approach as other countries in space exploration?

I wanted to know if China has a different approach or methodology for space exploration. China seems really fast in putting their first space station module in orbit compared to the US and Russia. ...
4
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2answers
4k views

Earth angular size looking from the ISS

Imagine you're, well, actually on the ISS so you're 395 km up. We've all seen many photos roughly like this... however this can be deceptive; They might be all fisheye lenses. A great many of these ...
6
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1answer
777 views

What is in the care packages sent to crew members of the International Space Station?

Each crew member of the ISS gets care packages on cargo flights. In a video tour of the station, it was mentioned that each crew member has a stash of favorite food just for them. It is easy to see ...
4
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1answer
1k views

Where does the clothing for the crew of the International Space Station come from?

This post talked about the standardized clothing list each astronaut or cosmonaut has when on the ISS. It is specified carefully in consideration of the fact clothing can't be washed, so it is used ...
14
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3answers
5k views

How does an astronaut pack for the ISS?

This article talks about a 'Personal Preference Kit;, a bag measuring 5" x 8" x 2", that could weigh no more than 1.5 lbs. It was the sole space an astronaut could use for personal items. But it ...
6
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1answer
339 views

How does delaying Soyuz TMA-15M crew return help with ISS schedule slip due to failed Progress M-27M resupply vehicle?

After the failed Progress M-27M / Progress 59 resupply mission in late April 2015, Roscosmos and NASA have been working on ISS schedule changes to accommodate loss of supplies to the station, while an ...