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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1answer
79 views

Plans for HUD in next-generation spacesuits

A HUD (Head Up Display) allows a computer to display information directly into a user's line of sight and thus allows them to interface with that computer without needing to look at a tablet or ...
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Duration of SpaceX Demo-2 mission

I've read that the duration of the current SpaceX demo mission to the ISS and back is highly variable. It was originally estimated they could be on-board the ISS from 1 to 4 months, and currently ...
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On the ISS what is that frame with a criss-cross of rubber bands?

You can see below a picture of Steven Swanson doing a detailed tour of the ISS. I was wondering what is that frame with rubber bands on the right? It just seems to block access to the racks behind. ...
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What typically gets sent to the ISS?

I'm working on a project that aims to understand what is needed to live in space. I understand the basic concepts and vital items needed, but I'd love to see a direct example of what is already being ...
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What is it like for ISS astronauts to re-adjust to the Earth's gravity?

ISS expeditions last up to half a year, as long as a flight to or from Mars would last. Here I answered to a question dealing with the adaptation of Martian visitors from microgravity to Martian 0.38 ...
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Effects On ISS Orbital Mechanics Resulting From Added Mass Of Dragon Capsule Visit

Does the ISS require any type of orbital mechanics management once the Dragon capsule was confirmed with a positive airlock seal, and the mass of the spacecraft, 2 additional astronauts, and supplies ...
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How, specifically, are ISS audio comm loops “privatized”? For example, in private medical conferences?

The paper International Space Station Medical Operations mentions Private medical conferences (PMCs) are conducted regularly and upon crew request with the ISS crew via private audio and video ...
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Do non-American space travellers train on Dragon capsule as well?

Soyuz is a spacecraft which still uses technologies from soviet era. The Dragon capsule is state of the art with its electronic upgrades. With Russia and US sharing the International Space Station ...
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Do astronauts on the ISS ever secure unpressurized cargo with an EVA to then be brought inside through an airlock?

Spacex's Dragon and JAXA's HTV are currently the only vehicles that can bring unpressurized cargo in addition to the pressurized one inside the vehicle. In the odd event that the ISS urgently needs ...
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What is the specified procedure to follow if there is a fail to create an airtight seal during hard dock?

I was watching the docking process of Dragon to the ISS including both the "soft dock" process, which was then followed by the hard dock involving 2 sets of 6 locking mechanisms. I believe I'm ...
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Do crew movements or movement of other objects ever affect space or Earth observation experiments staged on the outside of ISS?

The ISS serves as a platform for both Earth and astronomical observational instrumentation. Do routine movements of the crew or other objects ever cause problems for these observations through ...
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Do the ISS docking ports require maintenance?

Is it neccessary to maintain the docking ports of the ISS? Inspection, cleaning, lubrication, replacement of worn out parts like O-ring seals? Where are the seals, on both sides or only at the ...
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Are there any differences in docking procedures between ISS and manned capsules vs. unmanned capsules?

The Russian Soyuz has an extensive history in docking with ISS with both manned and unmanned capsules. SpaceX just recently demonstrated manned-capsule docking with ISS with a history of unmanned ...
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Why does opening the Crew Dragon hatch take so long?

What procedures are followed during opening of the hatches of both ISS and Crew Dragon, and why does it take so long?
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What is this diagram shown during Dragon docking with the ISS?

While docking with the ISS, the live stream showed this diagram with a green line starting at the capsule and looping around the area of the ISS. It would sporadically change and loop around the ...
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How do Space Ships dock themselves so flawlessly to the ISS?

Use of sensors and lasers seems obvious, but what all goes into the system that achieves this? What does the process entail? Example includes SpaceX's recent autonomous docking to ISS of Crew Dragon.
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Does Russian mission control still use the callsign “Zarya”, and how did that not conflict with the ISS module?

The Wikipedia page for the Salyut space station claims Initially, the space stations were to be named Zarya, the Russian word for 'Dawn'. However, as the launch of the first station in the ...
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H2 and CO2 ventilated outboard of the ISS, could become ice flakes in the extreme temperatures outside the ISS?

Outside the ISS in the orbital night, the temperature can reach -250 degrees Fahrenheit (-157 degrees Celsius). The ECLSS (Environmental Control System and Life Support System), more specifically the ...
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What happened during this shuttle simulation malfunction involving a failure of a shuttle arm joint while moving the JEF?

This author (cough) begins to relate the details of a particular training incident during simulations for STS-127. However, they very sadly have not finished the tale. Does anybody (cough cough) know ...
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Why was the Sabatier system removed from the ISS USOS?

In 2010 a Sabatier system was added to the Regenerative ECLSS part of the US side of the International Space Station. This system created usable water from hydrogen and carbon dioxide waste gases. A ...
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Where, physically speaking, are CO2, Hydrogen and Methane ventilated on the ISS

My question refers to the location of the Hoses (if I can call it that), which ventilate the by-product of water processing overboard (CO2, H and CH4). I found great sources on how the ISS ECLSS ...
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Where will the fourth crew dragon astronaut sleep?

The ISS currently has a crew of 3, that was brought there on Expedition 63 by Soyuz MS-15. Crew dragon flights will bring 4 astronauts to the iss which means that the ISS will have a crew of 7 on ...
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What exactly is “OMS2 Phase Angle”?

The vertical axis of this plot in this answer to How far apart are ISS launch windows? is labeled OMS2 Phase Angle (deg) and I don't know what that is. It's possible that OMS is related to things ...
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How far apart are ISS launch windows?

Being on an eccentric orbit, I imagine the launch windows are instantaneous (which they are) and different for each launch site whether it be Baikonur, Cape, Tanegashima, or the ESA launch site. How ...
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Why does the ISS occasionally operate with just 3 crew members?

There have many instances where the ISS only has 3 crew members, often for many weeks. This places significant strain on workload and productivity. Why isn't a new crew launched quicker?
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How many spacecraft can dock at the ISS at once?

With CST-100 looking likely to start flying (eventually) and Crew Dragon prepping for a human spaceflight, plus the existing Soyuz program I got to wondering how many craft could be docked at the ISS ...
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ISS: Airlocks between pressurized modules?

The ISS has several airlocks. I was curious about whether interconnected pressurized modules (like Kibo and Harmony) had any airlocks between them in whatsoever. There are two reasons why I think ...
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Have astronauts seen Starlink trains?

Starlink satellites move in the same altitude region as the ISS (on their way up and eventually back down) and are particularly noticeable for weeks after deployment as "trains". Have one of these ...
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At what wavelengths and for what particle types have astronomical objects been imaged or at least directionally resolved from the ISS?

The ISS has an X-ray telescope called NICER and this answer in Astronomy SE (and links therein) explain that it was able to show that there are hot spots clustered near one pole of the pulsar PSR ...
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Zarya means “dawn”. Has it ever faced the rising sun?

The first part of the International Space Station launched into orbit was the Russian Zarya module. When it was connected to the U.S. Unity module a few days later, the ISS was born. Zarya is the ...
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Can you buy land (while) in space?

The question Can you buy land on the moon? does not ask about being on the Moon and purchasing land on Earth, so I thought I'd ask here instead. Can astronauts in space buy and sell property on Earth ...
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Why doesn't Roscosmos launch Soyuz spacecraft with only Russians on board?

Just very curious. There are three seats in the Russian Soyuz spacecraft, and sometimes just one astronaut of the three is a Russian and the other two are either one American and someone from yet ...
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What's is this very CGI looking clip in this NASA video of the Alpha Magnetic Spectrometer installation?

This is the NASA video AMS Time Lapse Installation a time-lapse of the Alpha Magnetic Spectrometer (AMS) installation at the International Space Station. At about ...
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CBM dimensions for docking rings, auxillary umbilicals, and passage are in both active and passive sides

I am trying to 3D print some models for imagined and actual space craft. I was wondering if anyone was aware of technical drawings or other documents that give shapes and dimensions of the elements of ...
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What are the “25 bespoke tools (that) had to be developed” to install a new coolant system for the Alpha Magnetic Spectrometer (AMS)?

The 2020 Jan/Feb issue of the CERN Courier has an astronaut on its front cover and on the next page From the Editor begins: It’s not often that CERN Courier has the opportunity to feature an ...
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Why do rockets launching to the ISS from Florida point at 45 degrees to reach a 51.6 degree inclination?

In the Everyday Astronaut video about roll programs, it was mentioned in passing that in order to launch to a 51.6 degree inclination (to rendezvous with the ISS), the rocket must point at about 45 ...
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Are there any plans for an astronaut's two-year stay on the ISS? If no, why not?

A manned Mars mission would last about two Earth years. However no astronaut was continuously in outer space for that long, the record are Valery Polyakov's 437 days on Mir. If SpaceX wants to send ...
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Why so many laptops on the ISS?

By all reports, there are dozens of laptops on the ISS - more than 12 of them for every crew member. I understand that they are used as control consoles for various equipment that isn't safety-...
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Analytical expression for the ground track of the International Space Station

For a maths task in school, I am investigating the orbit of the International Space Station around the Earth. I understand that when the 3D movement in space is represented on a 2D surface, the ...
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How did the atmospheres of Soyuz, Shuttle, Mir, and ISS compare?

Soyuz and the Space Shuttle each docked with Mir and the International Space Station. When docked, the crew vehicle and station each share a common atmosphere for the crew to breathe. However, how ...
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How much cargo volume is devoted to food

On the ISS resupply missions go up about every 90 days or so. On those resupply missions how much volume and mass are devoted to food for the astronauts? I've found estimates for the mass to be about ...
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How much does the ISS “banana” or flex under the constantly changing conditions of solar heating?

This answer to Do antennae on the ISS have to constantly move to maintain data links? discusses some of the challenges precisely pointing an antenna mounted to the ISS exterior. While the ISSs orbit ...
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Satellite positions online (also historical)

Around 19:30 CET (UTC+1) we saw a satellite over Prague with my friend, and at 19:50 another one. The second one could have been ISS, according to http://www.isstracker.com/historical. But how do I ...
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What did I see just before the ISS but on a different trajectory?

I live at 49.99N, 8.57E. Today we had exceptionally clear skies. I was looking out a window towards the South between 7:48pm and 7:52pm local time (central european) when I noticed a strange light ...
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Can the International Space Station be maneuvered towards the Moon? [duplicate]

Is it possible to maneuver ISS towards the Moon or Mars (rare case in future)?
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What was the first official oath in Space?

CNN's 1,000 Army recruits made history by taking an oath of enlistment from an astronaut in space says: In a US Army first, 1,000 recruits took their enlistment oath Wednesday from an Army astronaut ...
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Chase orbit questions

So my google-fu is failing me so I'm hoping someone can help out here. I've been reading up on chase orbits and how things like the Shuttle, dragon, etc all approach the ISS and I understand the ...
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What parts of the ISS would impact the Earth with a substantial amount of kinetic energy?

There are several posts and comments about the parts of the ISS striking Earth on re-entry. Here is one example Would the ISS actually burn up completely? It's pretty big. No, the Mir was much ...
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If the ISS had an emergency, how long would it take to get a rocket to it?

If there was an urgent need to launch a rocket to the ISS, how long would it take to have a rocket ready to launch? I am trying to understand what factors take up the time to prepare for a rocket ...
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Are there any ISS component failures that could cause irreparable harm to the station?

What component, if any, would cause irreparable harm ("total") the ISS if it were to break or require replacement? If this component exists, when is it going to reach its end-of-life? By "total", I ...

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