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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6
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2answers
447 views

How big are the tidal accelerations within the ISS?

This question asks about placing an object at rest in the International Space Station. But the ISS is a large object, large enough that gravity will vary across it and cause tidal forces that can ...
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1answer
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Do astronauts develop the ability to regularly place an object at rest inside the ISS after extended periods in microgravity?

This image from the ESA prompted the question why the fruits at the bottom left were not floating. An online response claimed after an extended time on the ISS astronauts get used to placing ...
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How exactly is the balance of minerals handled on ISS with the use of reclaimed (demineralised) water for human consumption?

This question and answers to it contain wealth of information regarding recycling of ISS resources, and water is one of them. Water, recycled from water waste, atmosphere moisture and urine, is ...
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ISS Life Support Consumable use rate

At what rate does the International Space Station, (ISS), consume life support resources and other consumables? I'm attempting to calculate long term life supoprt requirements for a system based on ...
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1answer
205 views

Can an astronaut stand at attention in the ISS?

Am I correct in assuming it is near impossible for astronauts to stand still inside the ISS, even if their feet are secured under a blue IVA rail? NASA astronauts Terry Virts' foot under a blue IVA ...
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1answer
154 views

How many spacecraft deployed from the ISS have escaped Earth orbit? Are there plans for any in the near future?

After reading Why did the Ulysses probe reach Jupiter much faster than Galileo? and answers to How many Space Shuttle payloads ended up beyond Earth orbit? and also What's the largest rocket that was ...
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1answer
167 views

What caused the ISS Two Line Element Day of Year problem beginning 12-24-2019?

Does anyone know happened at NORAD or NASA or wherever the published TLEs originate, that caused the ISS TLE wonkiness during the last week of 2019? It did not happen in 2018. What happened? The ...
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2answers
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New Year's Celebration on the ISS

When/what time zone do astronauts aboard the ISS celebrate the new year? Bonus: How many NYE's can astronauts aboard the ISS celebrate, counting only when the new year starts in the time zone they'...
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2answers
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First actions taken after identifying a potentially catastrophic decompression?

Organic Marble gave an answer to my question "Procedures if there was a shuttle decompression in the vacuum of space," precisely as I worded the request. The wording of my question was imprecise so ...
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167 views

Potential catastrophic death on the ISS from mistakes

Other than from decompression and fire, what other ways has NASA or the Russian space program identified unique ways someone on the ISS could die suddenly, in particular from human error with the ...
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What happens between Payload deployment and the ISS docking

When SpaceX is livestreaming their CRS missions they usually end up by separating the payload from the second stage with an altitude at about 200 km. But I am wondering how the payload gets up to the ...
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Building the ISS LVLH frame in ECEF/ITRF coordinates

I am trying to calculate the International Space Station (ISS) LVLH (Local-Vertical-Local-Horizontal) base vectors expressed in the ECEF/ITRF frame at a given time. The point is then to calculate the ...
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How do the Starlink satellites shine?

As we can see the Starlink satellites with the naked eye as they pass by. I was wondering about what makes them visible. Do they have large mirrors that reflect the sunlight making them look as if ...
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1answer
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How do astronauts brew tea on ISS and what brewing temperature is common?

Do astronauts add hot water to a packet that contains a bag with real tea leaves or is it dry tea powder? If they use real tea leaves, what would be the water temperature for the brewing? To get the ...
12
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1answer
463 views

Does the “Tennis Racket Theorem” apply to the ISS? Does it rotate around its intermediate (unstable) axis?

Wikipedia's Tennis racket theorem begins: The tennis racket theorem or intermediate axis theorem is a result in classical mechanics describing the movement of a rigid body with three distinct ...
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ISS cupola window orientation [duplicate]

I understood that ISS window always faces the Earth. Wouldn't it happen if ISS was hypothetically fired in one piece around the Earth (window pointing to Earth at the start) without any further ...
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1answer
81 views

ISS attitude yaw pitch roll conventions. Which one to use?

I found three definitions for the attitude angles of the ISS (yaw, pitch and roll), from three different source. They contradict each other. See the following pictures. For my problem, I have to ...
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1answer
152 views

Were any mammals born in space (or are there any confirmed planned missions to breed them)?

This answer claims rats had been born in space, but link with confirmation is broken. Some pregnant rats were in space, but those didn't give birth in space. This question has good answers regarding ...
3
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1answer
79 views

Besides the (currently down) HDEV, are there other public live video feeds from the ISS?

I am working on spacecraft simulation software, and I would like to validate my ISS simulation that uses ISS-Mimic's code to connect to live ISS telemetry. I already have some early validation done ...
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What happens differently when ISS is inside this red boundary (Russia & Europe & …)?

The question Why are there advertisements in the Russian ISS flight control room? shows the image below. There is a large red boundary that looks like the boundary of the overlap of several circles ...
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1answer
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Why are there advertisements in the Russian ISS flight control room?

I found a photograph of the Russian ISS flight control room: Source: NASA https://commons.wikimedia.org/wiki/File:Russian_ISS_Flight_Control_Room.jpg Below the large screen are several ...
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1answer
121 views

Did NASA ever supply astronauts with canned food?

Looking through information regarding food for ISS, one thing caught my eye: a lot of canned food for Russian cosmonauts (as a side note, they apparently have bread (and crackers!) there too (...
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1answer
482 views

What about Orion ISS missions?

I remember that the Orion spacecraft was a thing when it had its maiden voyage in 2014. Nowadays, all I read about is the SpaceX Crew Dragon and Boeing Starliner, which are both running late. Soyuz ...
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Speculative assumptions about ISS end of life vs. physical limitations

Is it possible to modernize ISS, replace parts one by one and it will still work, or is there a set of components which can't be replaced and will therefore come to a non-extendible "hard" end of life ...
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Will be there no ISS in 2030s according to current plans in 2019?

While it took about 10 years and 30 missions to assemble the ISS, and its end of life is about mid to end of 2020's, is there any plan to plan for a new ISS? Otherwise, the time window might become ...
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Do astronauts on the ISS refer to themselves as standing?

When on the CEVIS,(Cycle Ergometer with Vibration Isolation Stabilization) I'm assuming the astronauts would say they are sitting. When they secure their feet under a blue IVA rail do they say they ...
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1answer
272 views

Door to vacuum on the ISS

Provided I had superhuman strength and the ability to open a door even with one atmosphere working against me, are there any singular doors or windows on the ISS which I could open directly to vacuum? ...
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1answer
193 views

Would ISS raise up with the help of the self-powered ion thrusters?

The solar arrays provide about 100 kW of power, so we can put the two HiPEP thusters providing 1 N (1000 mN) power combined, with the specific impulse as high as 6000–9000. Such an acceleration force ...
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1answer
139 views

Would it be possible to Boost ISS to L1 or Lunar Orbit?

NASA and Russia plan to retire the ISS before 2030, and to launch a new lunar outpost to lunar orbit. This output could then be a gateway to future mission to Mars or the outer solar system. My ...
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When might we get fourteen people in space?

The record for the number of people in space at one time is thirteen, which has been set a few different times (as discussed in this question, this other question, and this article). In order: March ...
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1answer
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Are the EVA suits used in the ISS and in the NBL same or different?

Are the space suits used in the International Space Station (ISS) and in the Neutral Buoyancy Lab (NBL) same or different? They look similar, but they are used in two different media - one in a vacuum ...
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Which type of Power Plug do we use on the ISS?

The following map shows the different types of power plugs and sockets used by countries all over the world: The International Space Station (ISS) is a joint project between five participating space ...
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1answer
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Crew Positioning in ISS during Reboost

Several questions address the reboosting procedure for the ISS. When the shuttle reboosted the station, apparently the entire ISS was modeled on the ground and pre-programmed in, down to the masses ...
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1answer
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How hard was it for the Shuttle to perform attitude control for the entire ISS? Did they have to calibrate?

This answer to the question How was the Space Shuttle Orbiter used for ISS Reboost? describes a procedure I never knew happened. When the shuttle was docked to the ISS it sometimes used its rear ...
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Have there ever been any incidents where something valuable was unintentionally throw out with the trash?

In "What do astronauts do with their trash on the ISS?", a commentor asked the title question and was encouraged to make it a new question, but apparently never did. The linked question is referring ...
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1answer
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How do we use Fire Extinguishers to Control Fire in the Space Station?

In this NASA Webpage for Fire Prevention in Space, it is given that If a fire were to occur on the ISS, the astronauts would become firemen and follow a three-step response system. First, they ...
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1answer
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How was the Space Shuttle Orbiter used for ISS Reboost?

According to this answer, for the question How often does ISS require re-boosting to higher orbit?, During Space Shuttle years, small re-boosts were also performed by the Shuttle Orbiters (...
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1answer
627 views

What is the “space grease” used to lubricate the ISS robotic arm? What are the material considerations for it?

Space.com's Spacesuit Gloves Contaminated During Friday's Historic Spacewalk quotes NASA astronaut Christina Koch (Wikipedia, NASA): "And so," she continued, "of course, a mechanical component like ...
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Why are space tools shiny

I was watching one of the broadcasts of a space walk on the ISS. I noticed the Pistol Grip Tool (Thanks Courageous Potato) looks like its made of polished stainless steel. Why do these tools have ...
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3answers
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How are astronauts in the ISS protected from electric shock?

On Earth, most of the electrical appliances having exposed metal parts, such as electric iron, are grounded, to protect the user from electric shock when an uninsulated-wire accidentally comes into ...
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When will ISS return to approximately the same projected location on Earth's surface?

The ISS sailed over my country, Sri Lanka on the eve of yesterday (14th October), and there was some news coverage on the event. While the reporting wasn't particularly scientific or even factual (I'm ...
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What (if any) replacement parts have been 3D printed on the ISS and then installed?

The Phys.org article Six degrees of nuclear separation contains the following sentence in the introduction paragraph for background Astronauts now print their own parts in space to repair the ...
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Does reflected sunlight from the ISS prevent astronauts from seeing the stars during an EVA?

I'm assuming during an EVA when an astronaut is facing the station reflected sunlight reduces an astronaut's dark adapted vision to the point they can no longer see the stars until either the station ...
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Why doesn't the ISS have more oxygen generators?

According to this article, the O2 reclamation on the ISS is capable of producing about 2kg of O2 per day. However, crews need slightly more than this. What is preventing NASA/Roscosmos/anyone else ...
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1answer
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Colors of the ISS solar panels?

What color(s) does the solar panels on the ISS look like the human eye through either a spacecraft window or helmet visor? The solar panels look a different in different photos. ESA website NASA ...
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1answer
237 views

What protocol is in place if an astronaut kills another astronaut in or around the ISS?

Say one astronaut murders another astronaut in or around the ISS, what would happen? Are there any protocols or instructions about what to do? Calling the space police does not seem like an option.
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Did CNSA astronaut Zhai Zhigang see the ISS during an EVA?

This answer to Has an astronaut ever seen another object in LEO pass by that wasn't mission-related? says: The encounter happened at longer distances ($\sim47\;km$) and the Shenzhou-7 is smaller ...
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Term used to identify the blue bars/rails in the ISS?

The interior of the ISS is filled with blue bars used by astronauts to secure their feet and remain in one place. Does NASA have a term for these?
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1answer
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Do astronauts use their toes to grip with in zero gravity?

Feet and toes are not usually as dexterous as hands and fingers but they can grip and hold things. With training and practice they can be like third and fourth hands. Are there any astronauts who make ...
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1answer
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Tracking the Soyuz MS-15 approaching the ISS with binoculars

Next Wednesday, September 25th, the Soyuz MS-15 will be launched from the Baikonur cosmodrome. I guess the trip to the ISS will be long (6 hrs to 24 hr) as usual. I want to see both the ISS and the ...