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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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616 views

Why does the current Soyuz flight (2018-06-06) take two days?

At NASA's blog you can read about the Soyuz flight for expedition 56-57. It says: ...blast off Wednesday at 7:12 a.m. EDT on a two-day trip to the station. Why does it take two days this time? ...
8
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1answer
242 views

Would it be possible to split the ISS?

Reading the question about which modules of the ISS are provided by which partner and in light of the discussion about the future of the ISS the following question came to my mind. From a technical ...
6
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1answer
394 views

Why was the ISS' DC vacuum cleaner replaced with an AC version? Are there “wall sockets” throughout the ISS where it's plugged in?

The question Why did Apollo spacecraft use both AC and DC equipment? Still used in present and future designs? and especially the answer there reminded me of something I'd seen in the YouTube video ...
5
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1answer
118 views

What is the mass and power consumption of the COLBERT treadmill?

What do you think is the mass and power consumption of the COLBERT treadmill? Sources are greatly appreciated.
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5answers
12k views

What did the Soviet Union and Russia bring to the ISS?

From a comment on another question: The international agreements leading to the ISS are quite complicated. Leaving Russia aside, each of the international partners brought significant assets ...
9
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2answers
325 views

Can ISS astronauts see the lava from the Kilauea volcano at night?

The google news said "Lava from the Kilauea volcano can be seen from space" but it just links to the YouTube video of the same name. The screen shot of the video below shows a small ESA credit at the ...
30
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2answers
6k views

Why do we only use Soyuz to send humans to the ISS?

Why is Soyuz the only spacecraft that sends humans to the International Space Station and we don't use any other spacecraft?
3
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2answers
248 views

Why don't astronauts inside affect inertia of the ISS? [duplicate]

When astronauts move around inside the ISS, pushing off walls to stop and go, how does it not affect the inertia of the ISS, and send it rotating undesirably or off course, little by little. I expect ...
2
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0answers
81 views

Will Nasa take the opportunity for another one year ISS mission now?

Since the Soyuz MS-10 in October will only have two persons aboard, it would be a great opportunity for space science on the ISS to let Richard Arnold continue his mission for another 6 months until ...
4
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2answers
233 views

Which way will the Neumann drive (on the ISS) point, what will be its maximum possible thrust?

After reading the answers to: Will the Neumann drive start testing aboard the ISS some time in 2018? What is Australia's Bartolomeo platform? When does it arrive at the ISS; when and where will it ...
6
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1answer
534 views

What is Australia's Bartolomeo platform? When does it arrive at the ISS; when and where will it be attached?

In this answer I first heard about Australia's upcoming Bartolomeo platform, which will be used for testing things such as the Neumann drive. Question: What is Australia's Bartolomeo platform? When ...
5
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1answer
417 views

Will the Neumann drive start testing aboard the ISS some time in 2018?

The 2016 Daily Mail article Radical ion rocket engine that could 'get to Mars and back on one tank of fuel' set to be tested on the ISS says: Neumann Drive achieves more than 11,000 seconds of ...
4
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1answer
136 views

Since there is no proper “ceiling” in the ISS where do they put the lights?

After reading this answer I started to think more about ISS lighting. In photos and videos from the ISS, the lighting seems to somewhat isotropic; I don't see many strong shadows "behind" or "under" ...
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1answer
134 views

What kind of lighting does the ISS use? [closed]

Is any feng shui used in lighting? Is the best light bulbs used with filters?
6
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1answer
181 views

Why don't ISS supply missions use their full payload capacity?

I was reading a NASA study talking about the benefits of flying the Dragon spacecraft vs the Space Shuttle. The study mentions that both launch systems use only about 2/3 of their payload capacity ...
3
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1answer
180 views

How many ISS robotic manipulators are shown in this image, and what are their names?

The Phys.org article NASA's new space 'botanist' arrives at launch site states: NASA's ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) left NASA's Jet Propulsion ...
6
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1answer
362 views

What is in ISS's waste product “brine”, and how is it disposed?

According to the Space.com article Astronaut Says It 'Smells Great' Inside the International Space Station (Video): "We want to increase the level of recycling wastes beyond what we do on the ...
5
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1answer
139 views

Are pressurized cargo ships to the ISS depressurized before leaving the station?

Cargo ships to the ISS have a pressurized part, directly connected to the space station. The ATV had 48 m3 The Cygnus have 27m3 The HTV have 14 m3 The Dragon have 10m3 The Progress have 7.6m3 (?) Is ...
11
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2answers
260 views

How does the sabatier system reduce water shipments to the ISS?

So I thought I'd answered my own question (How close is the ISS to a closed system?), but I just realized there's a missing piece. This is the chemical equation for how hydrogen, oxygen, and carbon ...
3
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2answers
95 views

ISS Induced Spin during Altitude Correction Boost

Since the entire structure of ISS is not perfectly symmetrical and that the thrust vector produced during firing up of Soyuz thrusters/engines during altitude correction, is not perfectly aligned with ...
7
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3answers
1k views

To what extent is the orbital Time Period of ISS affected by soyuz thrusters?

Numerically, to what extent is the orbital time period of ISS affected during the time when it boosts back higher to gain the lost altitude, using Soyuz thrusters/engines?
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3answers
501 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 ...
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3answers
320 views

How steady is the atmospheric drag force experienced by the ISS?

Suppose one wanted to modulate the power of a hypothetical, powerful ion thruster on the ISS to continuously compensate the atmospheric drag force in order to achieve near-perfect free-fall conditions ...
4
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3answers
742 views

Why doesn't the ISS use ion engines to maintain altitude?

So the ISS uses small thrusters on the Soyuz (usually) to perform occasional reboost burns to raise its orbit. This goes through, from what I can tell, around 3,500 kilos of fuel per year. Would it ...
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1answer
140 views

What material is used on the ISS for conducting electricity?

Got a million questions, this is the first.
14
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1answer
240 views

Astronaut orientation etiquette

How does the microgravity environment on the ISS change how people interact or converse? Is it polite or common to be oriented the same direction as who you're talking to? Also, when you see new ...
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3answers
7k views

Why won't they recover the Falcon 9 from CRS-14?

According to the upcoming livestream of SpaceX CRS-14 (resupply of ISS): SpaceX will not attempt to recover Falcon 9’s first stage after launch. Why not? Wasn't that the whole point of (among ...
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1answer
155 views

Were there special circumstances leading to these astronauts' spacewalking 5 days after arrival at the ISS?

@This answer describes two cases where astronauts performed space walks less than six days after arriving at the ISS; Timothy Kopra (Expedition 46) Andrew Feustel and Richard Arnold (Expedition 55) ...
2
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1answer
163 views

What's the soonest after ISS arrival that an astronaut has gone on a spacewalk?

I've just read in the New Jersey Herald: Two new arrivals at the International Space Station went spacewalking Thursday less than a week after moving in. NASA astronauts Drew Feustel and Ricky ...
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0answers
71 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 ...
17
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3answers
4k views

Why does the ISS need thermal blankets if the Sun is hot?

If space is cold at 2.7 Kelvin and heat can't escape in a vacuum then why is the ISS wrapped in space blankets if the sun is hot?
3
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0answers
173 views

Why did Columbia never visit the ISS? [duplicate]

According to Wikipedia, there were sixteen Space Shuttle missions to the ISS before the loss of Columbia; of these, six each were by Endeavour and Atlantis, four by Discovery, and none at all by ...
12
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1answer
2k views

Why is there a need for getting rid of ISS trash using the empty ATV and similar vehicles

Why is trash from the ISS sent down in some of the cargo vehicles. Would it not make more sense to dump it overboard in the downward + retrograde direction (as described here) and use reusable cargo ...
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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 ...
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2answers
363 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 ...
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0answers
238 views

Common Berthing Mechanism Dimensions

I've found detailed information on the International Docking Standard, enough to start work on a detailed CAD of the mechanism. (http://www.internationaldockingstandard.com/download/...
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2answers
538 views

How long does trash jettisoned by hand from the ISS fall before burning up on reentry?

NASA proposed a policy for the jettison of trash from the ISS space station. This article notes that a recent ISS space station spacewalk by Russian cosmonauts involved one man jettisoning by hand a ...
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1answer
276 views

Have astronauts gotten sick on EVA?

In lots of science fiction, people have EVA suits which automatically preform First Aid or administer temporary medical help (such as painkiller injections) so that they can get themselves to a safe, ...
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1answer
3k views

Why does the ISS cupola have Interior Protective Sliding Windows

As shown in the center right part of the picture, the International Space Station cupola has an interior sliding window frame, maybe detachable, such as cameras among other instrumentation. Note that ...
3
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1answer
227 views

How much would it cost to replace the ISS if we started the effort in 2018?

To the extent that the numbers can be untangled, how was the cost of the ISS distributed in categories such as launch, hardware, and R&D? Since the retirement of the ISS is in the offing, I'm ...
2
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1answer
141 views

How to dock space-craft to the ISS?

ISS is orbiting the earth at a speed of 7.66 km/s. It's a really very high speed. So how does a spacecraft that is trying to dock achieve it? Do both spacecraft move at the same speed and in same ...
2
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1answer
114 views

Power requirements for NASA's Variable Power Laser Welding Torch

NASA uses a Variable-Power Handheld Laser Torch for their welding in space operations and fixing things in orbit. I've got several questions about this system. Is this system currently available/in ...
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2answers
285 views

When astronauts or cosmonauts get seated in the spacecraft, are they actually sitting up or lying down?

This might be more of a physics question. If it is, I'll post it in the physics site. If the spacecraft is vertical, wouldn't the astronauts be seated in a lying position so that the G forces do not ...
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1answer
6k views

Why does the ISS have so much pressurized but uninhabitable space?

From this answer I learned that the International Space Station has over 900m3 of pressurized volume. However, the same answer points out that the inhabitable volume is under 400m3. It seems odd to me ...
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2answers
632 views

Why does NASA use freeze-dried food for the ISS?

I watched a short documentary on youtube how NASA workers shop in a supermarket or order products, then get meals like spaghetti cooked at their facilities to be freeze-dried and vacuum-sealed for the ...
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2answers
414 views

Was this large pieces of “space junk” just released from the ISS in the “nadir and retrograde” direction?

According to Space.com's 02-Feb-2018 article Cosmonauts Break Russian Spacewalk Record During Space Station Antenna Repair: The cosmonauts spent the day replacing an electronics box for a high-gain ...
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1answer
1k views

Do ISS astronauts notice, or experience symptoms of elevated CO2 levels? Do they wear monitors regularly?

A recent (Sept. 2017) news item on the company website of Gas Sensing Solutions Innovative sensor technology assists NASA with vital wearable CO2 monitoring equipment caught my eye. A section of the ...
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4answers
27k views

Why does the ISS have to be destroyed?

ISS might be destroyed soon, de-orbiting for a controlled reentry into the Pacific Ocean. Why isn't simply pushed away from Earth to an outer stable orbit (not sure if it's possible) or even into an ...
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1answer
346 views

For a given amount of fuel, what is the best de-orbit profile for the ISS?

Reading this question, what is the best way to make sure most of ISS (or any other large object planned to be destroyed in the atmosphere) will burn and break into relatively small pieces in the ...
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1answer
367 views

What is this object outside the ISS that looks like a loudspeaker?

Things in space are not always what they seem. The question Why does there appear to be a 180-degree stereo microphone array outside the ISS? makes that clear. What is this object shown to the right ...