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
225 views

ISS location identification; estimate size and direction of astronaut acceleration puzzler

note: This question addresses the same video and phenomenon described in this answer (which I found after posting this) but here I'm asking for an analysis of the trajectories of the test masses (the ...
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What is the orbital boost acceleration of the ISS?

How much acceleration does the International Space Station experience during its orbital adjustment boosts? How much thrust and for how long? Bonus question: what is the highest acceleration that the ...
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why do astronauts in the ISS still use wired microphones?

While I watched the DM-1 hatch opening, I noticed that astronauts use the wired microphone to talk to Huston. It was particularly strange seeing that even because during hatch opening, they were ...
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How do ISS astronauts “get their stripes”?

This answer shows two astronauts on a spacewalk outside the ISS. The caption reads: Rick Mastracchio as EV1 (red stripes) and Mike Hopkins as EV2 (no stripes) leaving the airlock during US EVA-24 (...
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What are these green text/line displays shown during the livestream of Crew Dragon's approach to dock with the ISS?

During the livestream of Crew Dragon's approach to docking, at 6:24 a laptop display is shown with lots of green text and a camera view of the International Space Station. What's going on?
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What is Crew Dragon approaching in this picture?

Crew Dragon (without a crew) just docked to the ISS for the first time last night. Most of the news reports on it are using the below photo. I thought it was supposed to dock to the Harmony module's ...
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How are airborne particulates monitored on the ISS? Are they distinguished at all by size and/or type?

The question What kinds of activities, experiment and, procedures done on the ISS must be done in chambers vented to space? links to and quotes from this answer to the 3D Printing SE question How is ...
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What kinds of activities experiment and procedures done on the ISS must be done in chambers vented to space?

This answer to the question in 3D Printing SE How is 3D printing done in space? says The first big space-specific issue is actually air quality. You can't just open a window to air out the molten-...
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How is the atmosphere in the pressurized housing of ISS' HDEV cameras managed? Outgassing addressed?

This answer says: The ISS live feed uses the cameras of the HDEV experiment. This is a group of four cameras in a pressurized housing attached to the outside of the ISS. A hermetically sealed ...
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What are the consequences to breaking the ISS?

Suppose a relatively minor space faring government or a private company had permission to dock with the International space station. But then, due to their incompetence they caused a major problem. ...
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189 views

How does SpaceX plan to obtain Oxygen in Mars?

In the ISS they obtain Oxygen from water through electrolysis. I guess this could be possible in Mars if they land near a large water source. NASA in the other hand, it's working for ways to obtain ...
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Can they isolate individual modules on the ISS?

In the event of a leak, in the cupola for example, can they isolate individual modules of the ISS?
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159 views

When reading “the writing on the wall” in the ISS, which way is up?

This answer to the question Is there really no difference between up and down in ISS? says: ISS does have a sort of 'up and down', deliberately created as part of the design. All the modules ...
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What's the shiny triangular feature on this Progress vehicle?

Picture from here What's the shiny, slightly curved triangular plate with rails above it? A larger version, cropped from here, thanks to a comment by ohsin.
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Why do the ISS' Thermal Rotary Radiators need to tilt?

This answer shows the first image below of a vintage view of the ISS. Only one of each triplet of thermal radiators is extended from each TRRJ. The ISS' solar panels articulate to modulate the ...
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Heat balance of the ISS: breakdown?

Is there available breakdown of the heat balance of the International Space Station? In particular: How much heat is produced? by direct warming by sun by warming of solar panels (heat for the ...
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Why are the big solar panels on the ISS orientated away from the Sun? [duplicate]

While looking at this picture below from another question I notice all the panels are not facing the Sun. Why is that?
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What are these stacked panels on the ISS in this image?

I found this image of the ISS in a folder on my computer. I don't know the exact source but a reverse image search shows it in many different websites. Unfortunately I can't pin down a date. What are ...
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How do astronauts keep their devices dry?

In these videos astronauts are drinking and playing with water. We can see water droplets floating away to the surroundings. Do these droplets affect the machines in any way? What do astronauts do to ...
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How are the payload limits of robot arms on the space station determined?

I have just been wondering how the payload limits for the arms on the ISS were determined. Any back of the napkin calculations to explain these? In that vein, I could not find any information on the ...
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8k views

Was water ever taken outside a spacecraft?

Has an astronaut (or cosmonaut) taken water out of a spacecraft to see if it boils or freezes?
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Would a space station be able to watch a world wide cataclysm and how long would the crew be able to survive for? [closed]

I know there is other questions with similar concerns about there being any protocols in pace if the crew of space station were to witness a world wide cataclysm and the survivability of the crew if ...
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Is the cupola, on the inside of the ISS, cold or warm to the touch?

Does the temperature of the surface of the cupola vary when the ISS is in Earth's shadow, compared to when it is on day side of the Earth? Is it cold to the touch when the ISS in the shadow?
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Which country borders are visible from space?

You can see the borders of North Korea with China and South Korea at night from the ISS since unlike their neighbours, they have almost no light. That got me thinking, which other country borders (of ...
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What is a brake handle on the ISS crew equipment carts?

Outside the International Space Station, there is a device called a brake handle on the crew equipment carts. I couldn't imagine that device, what is it and what is it for? I found it in the book of ...
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155 views

How does SpaceX's Dragon get to the ISS?

How does SpaceX's Dragon capsule get to the ISS? Does Dragon use the onboard Draco thrusters in order to raise its orbit to the station or does the second stage of the Falcon 9 perform the majority of ...
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Is the ISS in danger of the outer radiation belt?

Is the ISS in danger of the outer radiation belt? I know that the ISS is in the low earth orbit and that it briefly passes through the base of the outer RB, but it is actually in danger? How does the ...
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ISS reboost cost

The most updated data available at spaceflight.nasa.gov show that on day 361 there was a reboost: IMPULSIVE TIG (GMT) M50 DVx(FPS) LVLH DVx(FPS) DVmag(FPS) IMPULSIVE TIG (MET) M50 DVy(...
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Can I text on my cell phone from the ISS to Earth?

We know from Can we detect the cell phone, satellite phone, or walkie talkie of someone walking on Mars from Earth? that cell phone signals on Mars are potentially observable on Earth. I am not an ...
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114 views

How Is The Quest Joint Airlock Operated?

I have searched and searched and cant seem to find any media whatsoever that explains or outlines exactly how the airlock is operated. What exactly is the process you go through to open it, do you ...
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126 views

What's the largest screen for watching videos on the ISS?

There are many laptops on the ISS, for controlling non-critical things and for personal use during free time. Even at least one iPad. Are these the largest screens available? If the crew wants to ...
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How often has (or how common is it for) the ISS's orbit been propulsive lowered intentionally?

The question Which engine worked the hardest to keep the ISS in orbit? laments the tireless efforts to keep the ISS from falling from the sky by regularly executing propulsive orbit-raising maneuvers. ...
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Which engine worked the hardest to keep the ISS in orbit?

The ISS has spent two decades fighting drag caused by its large size and huge solar panels pushing through the tail-end of Earth's atmosphere only a few hundred kilometers above its surface. Question:...
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How long could a spacecraft be attached to ISS?

I've recently noticed how the "Design life, when docked to Space Station" parameter, varies across some of the modern spacecraft that are capable of docking to ISS these days: H-II Transfer Vehicle - ...
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Where is the hole now? (ISS/Soyuz spacecraft hole)

Gizmodo's Report: ISS Hole Drilled From the Inside, Cosmonaut Says has made me realize I've lost track of the hole. It was in the part of a Soyuz spacecraft docked to the ISS wouldn't contain the crew ...
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What's up with the “Apollo” computer on the ISS? How is it being used?

There's a high performance computer on the ISS (HP "Apollo" HPC). How is it being used? Is it there just to check the hardware in the low/modest radiation environment of the variety found in LEO with ...
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441 views

With six spacecraft currently docked at the ISS, how could Santa (or anyone else) deliver presents?

This ISS tweet says: Three days after launching from Florida the @SpaceX #Dragon cargo craft was installed to the Harmony module at 10:36 a.m. EST. There are now six spaceships parked at the ...
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How many capsules have visited the ISS more than once?

How many capsules have visited the ISS more than once? Just that. But if the number is very small, then their IDs or any commemorative markings they might have would be a bonus.
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What is the delay of the YT live stream for ISS?

On YT, we can see a live stream from ISS. What is the delay here (given you have a modern high speed internet access)?
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What optical design is used by the GEDI's receiving telescope and how is the secondary held in place?

GEDI is a sophisticated LIDAR instrument now on its way to the ISS. Once installed, it will use powerful laser pulses (10 mJ, 242 Hz) from several lasers to map height in 3D, collecting multiple ...
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How will Robotic Refueling Mission-3's liquid methane tank remain full for six months without any boil off?

Space.com's Lasers, Crystals and 36,000 Worms Will Ride a SpaceX Dragon to Space Station says: To fly on those journeys, astronauts might have to someday harvest fuel from the surface of the moon ...
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Why was there a miniature bread on the ISS?

In the NASA images and video library there is a image of a miniature bread floating in ISS node 1 (expedition 34 in 2013). Unfortunately I wasn't able to find any information on the experiment or ...
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Were shuttle and ISS spacewalks always done with two astronauts?

Even if only one astronaut is needed for an EVA, it makes sense to have a second suited up and outside in case of an emergency. Was there ever any exception to this number (e.g. 1 or 3) for the space ...
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Has the monthly average skin temp of the ISS increased during its years in orbit?

Is there a source of monthly average sun-side maximum temperatures during its (ISS) years in orbit?
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Is microgravity “known to” increase bacteria's tendency to acquire foreign genetic material and become metal & antibiotic-resistant?

The RT article Mutant superbugs menace future space station expeditions – NASA ends with: Microgravity is known to increase a bacterium's tendency to acquire foreign genetic material and to become ...
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Iron powder reaction in chlorate candle [closed]

When a sodium chlorate candle is ignighted, the iron powder is burned to allow the oxygen to be released with the reaction 2NaClO3 → 2NaCl + 3O2 The iron powder is not included in this equation, and ...
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What is this huge, red, blinking light structure on Earth seen from the ISS in this video?

The video ESA video Progress launch timelapse seen from space is of course striking for many reasons. However there is a strange, blinking light structure on Earth that's quite puzzling! I've added ...
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ISS Destiny Module inner wall: thickness set by internal atmospheric pressure or by mass density needed for meteor shielding?

In their 2006 paper Christiansen et al. describe the "stuffed Whipple shield" wall of the ISS's Destiny Module. The outer skin, the Whipple shield's "bumper" layer, is a thin layer of aluminum (alloy ...
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Is there an inventory of what is on the ISS?

I saw this tweet, and thought it was kind of funny. The ISS doesn't seem very big, so to find something like that seemed a little unusual to me. Mostly because it seems like there would be someone ...
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What are the causes of these episodes of faster than average altitude loss by the ISS?

@Cristiano's question No reboosts for the ISS shows the plot below. I don't have the original source. I've added some annotations including four arrows to indicate what looks like short periods (a day ...