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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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How does this ISS vision-testing instrument work? What exactly is being measured, and how?

This tweet by Surrey Satellite engineer Enguerran Petitfils says Astronaut Serena Auñón-Chancellor Examines Her Eyes via NASA https://ift.tt/2NmEt6k What is this device exactly, how does it work,...
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This image of the Space Shuttle is truly beautiful, but is it real?

I saw this image in the Infobae article La NASA probará un paracaídas para posar naves espaciales en Marte ("NASA will test a parachute to place spaceships on Mars"). The image looks plausible to me, ...
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Is this window zenith-facing? (ISS docked Soyuz) If so, how directly?

Pursuant to the question Does the ISS have zenith-facing windows? to which the conclusion (in my opinion) is that there may be a window that provides an oblique view that might include the zenith if ...
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How many leaks have been fixed on the ISS, roughly?

Leaks come in all sizes. Very small ones might be ignored or remain undetected, slightly faster ones might be identified and dispositioned; if they are slow and going to remain stable, they might not ...
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What is the big hole next to the 2mm hole that caused the 2018-08-30 Soyuz MS-09 / ISS leak?

The small hole in this picture is being reported as the cause of the ISS leak. What is the large hole next to it on the perpendicular surface? The one that appears to have been drilled by an amatuer ...
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What are these antenna-like structures seen in Oleg Artemyev twitter video?

Russian Cosmonaut Oleg Artemyev's Sept 3, 2018 tweet has a narrated video of Earth from the ISS, at the time over the Nile river. The video is also in YouTube (below). At the bottom of the screen, ...
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How does automated docking work and why isn't it used more often?

It seems on every flight to the ISS for either people or just cargo, there is always a big deal over manual docking, lots of back and forth over comms, pinpointing the right spot, slowing down in a ...
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How could the 2018-08-30 Soyuz MS-09 / ISS leak be so slow?

The leak reportedly led the ISS to lose 0.8 millibars of air pressure per hour, which is both big considering what was at stake and low for a 2-mm hole when the outside is near to complete vacuum. Am ...
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Did NASA “publish”, then “delete” this and other photos of the ISS leak?

A tweet by @NASASpaceflight (Chris B - NSF, "Managing Editor of NASASpaceFlight.com" says: ISS Leak summary: First thought was MMOD strike. Then NASA released pics. Lots of people: "Hmmm,...
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How far/much time could an appendage extend outside of the ISS before succumbing to severe damage?

I was reading the question asked here in regards the Alexander Gerst's patching of a small (5mm) hole with his thumb temporarily. This got me wondering, if his thumb was only fine because the majority ...
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Was Alexander Gerst the first man to touch space with his bare skin and live?

On August 30, 2018, a hole was found in the Soyuz Orbital Module on the ISS. Astronaut Alexander Gerst initially plugged it with his thumb, meaning a part of his bare skin touched space. I can't find ...
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Is telerobotic surgery logistically feasible in orbit?

A recent comment said telerobotic surgery might be used in space, a follow up comment said that multiple minute light delays would complicate it. But I wonder if just the fact that being in orbit, ...
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Do Astronauts have their appendix removed?

A recenct article on the BBC news got me wondering about Astronauts in the ISS. technically they are fewer miles from the closest hospital, but the transportation is bit more complex. Imagine that ...
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What is astronaut Alexander Gerst signaling with this hand signal?

In this AP/WISN news item Air leak at International Space Station temporarily plugged by a thumb they show a file photo of German astronaut Alexander Gerst at the Baikonur cosmodrome, making what ...
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August 30th 2018 Soyuz leak, any dangers for re-entry?

On August 30th 2018, Soyuz MS-09 had a leak that was fixed by the ISS crew (source). Does the leak/fix have any consequences on using the Soyuz for returning to Earth? Would the fix hold the stress ...
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Is there, or has there ever been anything remotely like an electron microscope in space?

I'm guessing Cmdr Hadfield's tweet is only showing an old file photo, but electron microscopes can be quite handy and complement optical microscopes, at high or even low magnification as shown here. ...
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I'm not sure if what I've seen is the ISS or not

Can the ISS be seen clearly with the naked eye at dawn? I think that it passed over my location, and I barely saw the 4 solar "wings" as well, but I'm not sure of the last part, because people say ...
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Would a lower LEO ISS orbit really have a shorter eclipse duration than a higher one?

This comment says Lower orbit also mean shorter ones; for observations (one of the ISS missions) it is an advantage. It also have shorter night times (ie smaller batteries).. and the likely ...
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Does the ISS still “need” to be at around 400 km?

The video Why is the International Space Station 400 km above the Earth? first mentions that there are fairly hard limits at 300 km (due to imminence of reentry) and 700 km (loss of protection from ...
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Does ISS get a surplus of oxygen or water?

[overhauling the question to get rid of misconceptions, which were irrelevant anyway] In the balance of input/output of the system ISS is, I spotted something that looks like build-up of stockpile of ...
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Are there any examples of a reduced-gravity sporting event or match being played in space?

I created the reduced-gravity-sports tag because I see it as both technically/scientifically interesting, and likely to be really big in the future. So now I'd like to ask: *Are there any examples ...
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Why did the Chinese put the Tiangong-2 so high?

The most obvious answer is that they don’t want to deorbit the station shortly, but why? Some calculations with the TLEs and SGP4 show the following Tiangong-2 / ISS close encounters: ...
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International Space Station consumables shelf life duration

Most of ISS crew consumables are designed for a long store period. I couldn't find any info - what are shelf life durations for the consumables? What are typical shelf life in ISS storage for: ...
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Will Astrobee be the second time that an autonomous, mobile robot will use ROS in space?

The question ROS is running on the Robonaut, but is the Robonaut running on the ISS (post 2015)? asks about Robot Operating System or ROS. In the Art Technica video Talking Space and Robots with NASA'...
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How will Icarus aboard the ISS track bird migration?

The question Is it possible to see animals from space? has several answers, and they are all based on optical imaging. In this answer I describe and show images from the First count of individual ...
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What psychological issues do astronauts experience during spaceflight that are caused by spaceflight?

What psychological problems or issues do astronauts experience during spaceflight, that are caused by microgravity, background "white noise" or other unusual environments that astronauts in space are ...
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Music played in space

Besides the Curiosity rovers's rendition of Happy Birthday and Chris Hadfields guitar playing aboard the ISS, is there a list of music played in space live (robots playing music counts too)? Note: ...
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What are the chances that the ISS transits the moon as seen from your house (or headquarters)?

In this answer I tried to do a simple probablistic estimate on the distribution of the ISS's ground track passes over Earth's equator. Recently there is a photo of the ISS passing over SpaceX ...
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How does the ISS Transit Finder website get the position of the ISS so accurately?

The recent Petapixel article How to Shoot the ISS Flying Across the Face of the Moon gives a lot of detailed, helpful advice for photographing transits of the ISS across the disk of the Moon. For ...
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Information on ISS orbit?

Does anyone know the ascending node and periapsis for the ISS? This is for a MATLAB script. I cannot find it on the internet and figured that this would be a good place to ask.
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Fluid loading protocol, what's it and what's it for

In the book Endurance: A year in space, a lifetime discovery, there is a paragraph as follows: Then I hear Terry’s voice, breaking in midsentence, as if he were here with me: “. . . pills for the ...
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What would be needed for ISS to function in lunar orbit?

Not only the Chinese are rather unimpressed by the concept of "Lunar Gateway", which is summed up as a much smaller ISS in the Moon orbit. It made me wonder - wouldn't it be better to move ISS into ...
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Are the cubesats deployed from the ISS always directed “nadir and retrograde”?

@Tristan's answer to What are the orbital mechanical consideration behind hand-launched nanosatellites from the ISS? includes: If you launch nadir and retrograde, you will put the object into a ...
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Fish in space: what were the results?

I've been interested in the Japanese experiment on the ISS involving raising fish in space, but in all my reading the results seem a bit ambiguous/conflicting (depending on source). What are the ...
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Was anything special done for the Cygnus OA-9 launch to give it so much extra fuel?

The Cygnus OA-9 mission has had plenty of extra fuel to burn! While docked at the ISS, it burned for a while to raise the ISS' orbit. This may have been more of a demonstration and token altitude ...
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Is this ISS artwork old but accurate? Was there a radiator that looked like this once?

Along with today's NPR.org news article NASA Needs Backup Plan To Maintain U.S. Presence At Space Station, Watchdog Says there is a big of ISS artwork of the ISS. The caption says: International ...
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Is there internal diagram of Zvezda or information about the internal size of Zvezda?

I found a diagram of Zvezda showing the external features, but I can't find one showing the internal features. Does an easily obtainable diagram exist?
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How is Dragon-v2 prepared for being docked for months at ISS?

The Dragon spacecraft is being certified for manned spaceflight. If it's to replace Soyuz, though, it will have to serve as an escape pod for the crew. The current delivery missions are proving its ...
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What is the ESA Grip experiment, and why does it require Alexander Gerst to be strapped into it?

The text of this 14-June-2018 astronews.com tweet translated into English via google says: IMAGE OF THE DAY: Today's picture of the day shows the German ESA ...
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Are there free insects in the ISS?

Are there free insects, living and breeding in the ISS, not part of an experiment? I am not asking about an occasional escaped single fruit fly, Nor am I asking about insects contained in a enclosure ...
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ISS mass gain or loss due to meteoroids, solar wind, and other particles?

A few questions about the mass of the ISS (1, 2, 3) have got me thinking about mass change of the ISS due to natural processes. The ISS has quite a large area exposed to space, and is subject to both ...
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ISS' change in mass over time; might there be a fairly high cadence plot?

This answer shows that the mass of the ISS has changed by about 27,000 kg in the last three years. ...
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295 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 ...
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How hard do you have to throw something off the ISS to make it deorbit?

During Expedition 41 Reid Wiseman and Alexander Gerst replaced a failed pump on the outside of the ISS. I am guessing they took the broken pump back inside the ISS and returned it to earth in one of ...
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Has the ISS ever not had a lifeboat?

The International Space Station typically has one or more (manned) spacecraft docked. This is obviously to ferry crew to and from the station for each of the Expeditions. The Soyuz currently fulfils ...
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What nodes were used to send a NASA selfie from Antarctica to the ISS?

The November 29, 2017 NASA video Future-Proofing the Interplanetary Internet says: In a recent demonstration of the technology, NASA sent a selfie from Antarctica to the space station, making ...
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What GEO relay satellite will the ISS use for end-to-end optical communication with a ground station?

This LEMNOS page on NASA's Explorations and Space Communications site says: The Integrated Laser Communication Relay Demonstration (LCRD) Low-Earth Orbit (LEO) User Modem and Amplifier Terminal (...
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Plans for ISS crew to enter Crew Dragon?

Are there any plans for ISS crew to enter the Dragon V2 while it is docked during the upcoming Crew Dragon Demo 1 mission?
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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? ...
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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 ...