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 often has the Hitchhiker's Guide to the Galaxy been in space?

I came across an answer saying that a copy of the Hitchhikers Guide to the Galaxy was sent to space in Elon Musks roadster (in 2018). Has the book been in space before that (maybe taken to the ISS by ...
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How are the Archival Samples of water on the ISS handled?

This answer includes this schematic showing the overview of the water processing system on the ISS, found on page 341 (page 375 of the pdf) of The International Space Station - Operating an Outpost in ...
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Is the silica gel used in the ISS recycled?

I read this answer which raises the question of what happens to the silica gel used in the ISS once it has absorbed humidity. The ISS relies on silica gel to absorb humidity from the atmosphere to ...
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What happens to astronaut sweat on the ISS?

Does perspiration from the astronauts aboard the ISS stick to the skin, evaporate or somehow float away from the skin? Is the part of the sweat that sticks to an astronaut's skin kept there until they ...
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How are Kounotori modules unbolted? Who or what does the unbolting?

NASA Spaceflight's Final JAXA H-II Transfer Vehicle bids farewell to ISS says: Following CBM vestibule depressurization, 16 bolts that held the Kounotori 9 spacecraft to the Station were removed in ...
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ISS Docking / Undocking schedule availability

Is there a website or other API from where the ISS planned docking / undocking events could be available? I would also be interested in historical docking undocking events. Thank you very much in ...
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Taking custom software or hardware to the ISS

Before departing to the ISS, astronauts are allowed to pack some personal objects to be taken with them (see other question about packing). What if an astronaut had some self-written software (for ...
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Could the Crew Dragon be used to re-boost the ISS?

In an answer to a related question, Jörg W Mittag wrote the following: But more importantly, handling of the Superdracos is currently rather simple. They are safed after reaching orbit and then never ...
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Can Virgin Galactic's Orbital ship reach ISS

We have all come across theories, concepts proposed missions of orbit tour as a part of space tourism. One such company is Virgin Galactic. I have had read that the SpaceShip2 will have merely 6 mins ...
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What happens to the ISS waste? [duplicate]

How is the waste managed on ISS? I guess there are three main waste types: two human waste (liquid and solid) and various packaging for food and substances for experiments. Are they recycled or sent ...
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How much time it takes for the capsules to descend from ISS back down to Earth?

How much time it takes for the space capsules to descend from ISS back down to Earth? Soyuz, Dragon, Crew Dragon, Cygnus, European ATV and Japanese HTV and any other such craft. From the moment they ...
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Are there really “Dead End” signs on the outside of the International Space Station?

This question currently links to the NASA video Expedition 63 Inflight interview with Yahoo Finance KPRC TV - July 24, 2020 at 07:46 where a few seconds later ...
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Whats wrong with the camera in recent ISS videos?

In recent videos from the ISS, specifically videos after the recent Demo 2 docking, there are what seems to be little particles stuck inside or on the camera lens. I am wondering, is this damage from ...
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Was TORU really used on Salyut space stations

Digging a little bit in history of russian space technology, I stumbled over some inconsistencies regarding the TORU system. TORU (rus. Телеоператорный Режим Управления - Teleoperated Mode of (...
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Specifications on ISS EVA suit cameras

The suits that astronauts use to preform EVA's on the ISS have some sort of "TV camera" with which they stream analog video back to the ISS and then back to Earth so that we can see it on ...
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Would a higher air pressure on the ISS or elsewhere make it easier to “swim” in microgravity?

What if the atmospheric pressure onboard the ISS was 5 atm, 5 times the pressure on Earth and currently on the ISS, while maintaining the breathable oxygen level, e.g. if the additional atmosphere ...
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What is the blue and purple glitter dinosaur above NASA astronaut Robert Behnken in this video?

The NASA video Expedition 63 Inflight with New York Times, Fox News, and USA Today - July 7, 2020 includes NASA astronaut Dr. Robert Behnken, and above can be seen a blue and purple glitter covered ...
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Was the ISS closer to Baja California or California when this ISS press event started? When exactly did it start?

The NASA video Expedition 63 Inflight with New York Times, Fox News, and USA Today - July 7, 2020 begins with NASA astronaut and Expedition 63 commander Christopher Cassidy discussing with an ...
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Any official size for the ISS pizza box?

I still haven't found the official size of the ISS pizza box[1] and a search on the WEB doesn't help: "30 miles deep and 30 miles long around the space station": https://www.vice.com/en_us/...
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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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How often do other space vehicles visit the international space station?

I was surprised to read NASA's statement that This (27 May 2020) mission marks the first time since the retirement of the space shuttle in 2011 that humans will fly to the space station from U.S. ...
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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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