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Can SpaceX Starship Be laid on it’s side?
https://space.stackexchange.com/questions/45193/can-spacex-starship-be-laid-on-it-s-side
Published: September 18, 2025 02:59
SpaceX is building Starships at a good tempo and may finally build them faster then they scrap them. The Falcon 9s have always been stored horizontally and erected at the launch pad. I’ve never seen a Starship in anything but a vertical configuration. Has…
Why don’t two of these Astronaut Candidates have logos on their blue flight suits?
Published: September 18, 2025 01:14
One has the NASA logo on her flight suit and another has the CSA logo on her flight suit while others lack these logos. Why is this? Are they separate flight suits from any training other than water survival or from public appearances? from…
What is the composition of training in the SVMF?
https://space.stackexchange.com/questions/69860/what-is-the-composition-of-training-in-the-svmf
Published: September 18, 2025 00:35
I know the majority of astronaut training takes place in the space vehicle mock up facility. How is it broken down in what they train for in mockups of ISS modules? How is it broken up between the janitorial aspect of being astronauts , interfacing with…
Can you swim in space?
https://space.stackexchange.com/questions/8073/can-you-swim-in-space
Published: September 18, 2025 00:32
My wife shared this picture with me today: Adorable, but it got me thinking about that trope - swimming in space. I've seen it before, mostly in cartoons and not live-action shows, the latter of which tend to have either more realistic space stations…
What is the point of having both ARGOS and the nbl?
https://space.stackexchange.com/questions/69923/what-is-the-point-of-having-both-argos-and-the-nbl
Published: September 17, 2025 21:12
ARGOS stands for Active Response Gravity Offload System. It is a specialized robot that can offload all your weight or a certain portion of it to simulate weightlessness or lunar or Martian gravity out of water. What is the point of keeping the NBL with…
What was the "shear wedge" used on the Tethered Satellite System?
Published: September 17, 2025 20:42
While reading reports on NTRS, I found this one: https://ntrs.nasa.gov/citations/20160005655 It discusses a problem with an under-designed bolt in the Tethered Satellite System, which needed to be modified to fly. The solution (bottom of page 2) is a…
What if any other timelines do ISS astronauts train for outside of emergency scenarios?
Published: September 17, 2025 18:57
https://www.tiktok.com/t/ZTMJFKMno/ This video shows Saturday housekeeping including vacuuming out vents , removing stains and disinfecting high touch surfaces. Is there a timeline of other housekeeping or for routine station operations outside of…
What exactly makes it difficult for astronauts to walk immediately after landing after extended stays in space?
Published: September 16, 2025 23:06
Photos and videos of astronauts returning from the ISS being taken out of their capsule show them being mostly lifted out by hand and lowered into chairs, where they rest for a little while, then they are taken to what looks like a recovery tent for a…
How much time do astronauts spend in the SVMF vs the SSTF relative to each other during their training before an ISS expedition?
Published: September 16, 2025 19:17
I understand the SVMF is where they have very high fidelity mockups but don’t train for software much but that’s where they do train for emergency drills and housekeeping for example while the SSTF is where they train for the software but the simulators…
Could we use the moon for a slingshot effect?
https://space.stackexchange.com/questions/22737/could-we-use-the-moon-for-a-slingshot-effect
Published: September 16, 2025 03:45
The slingshot effect or gravity assist maneuver produces a boost on the speed of the object which attempts to approach a planet head-on at a speed V while the planet is moving directly toward us at a speed U (both speeds defined relative to the "fixed"…
Why were the images from DART encode in a way that cropped the last one the way it did?
Published: September 16, 2025 03:10
The last image from DART only includes about the top ⅒ of the image, but that portion of the image is in full quality. That suggests that the image encoding/compression is mostly a raster encoding. Off hand this seems to me like a rather odd choice. It…
Would it be practical to redesign the SLS - EUS with the Raptor 3 Vacuum, replacing RL10 engines? [closed]
Published: September 15, 2025 20:40
The SLS - Exploration Upper Stage (EUS) is currently powered by a single RL10 engine. Theoretically, NASA might decide to explore the feasibility of mounting EUS on top of the SpaceX Starship. But the launch tower for SpaceX does not support liquid…
Would it be practical to redesign the Falcon 9 second stage to be used on top of the SpaceX Super Heavy? [closed]
Published: September 15, 2025 18:09
I am changing the original question in order to try to salvage my blocked SE profile. I have several questions that I am unable to ask. If Falcon Heavy and Falcon 9 use the same second stage, and let's assume there is an urgent need to try to fit a…
What resources are available for identifying a particular Space Shuttle launch?
Published: September 14, 2025 14:23
I recently bought a jigsaw puzzle under the Eurographics brand, which features a space shuttle launch. Here is a photo of the same puzzle, from an eBay listing: I am curious which launch this is from. I haven't been able to make a clear identification.…
What is the actual Gravity Assist Equation to calculate Output Velocity
Published: September 14, 2025 07:15
I would really want you to help me, if you have the time of course, it has to do with an equation I have been struggling with for 2 years to find it. The equation I want to find is the one used to calculate the Output Velocity of the Satellites Voyager 1…
Would it be more viable to process moon rocks into Helium-3 on the Moon than doing so on Earth?
Published: September 14, 2025 03:07
Helium-3 is a substance that is very useful for nuclear fusion, which can generate a lot of power. Unfortunately we don't have a lot of it on Earth, but on the Moon it can be processed from basic moon rocks. Say that we figured out a way how to mine large…
Why should the non-reusable version of Starship's second stage weigh 20 times more than Falcon 9 second stage?
Published: September 13, 2025 23:06
The Falcon 9 without a reusable second stage can get to LEO the payload of 22.8 metric tons. The Falcon 9 upper stage (the second stage) has a dry mass of approximately 4,000 kg SpaceX's Starship (second stage) currently can bring 35–50 metric tones of…
Have there been any studies on how age affects suitability for space flight?
Published: September 13, 2025 21:48
In other words is there an ideal age for astronauts? Might younger or older people have any advantages as astronauts?
Why do we think that reusable second stage is a step forward?
Published: September 13, 2025 21:02
The Falcon-9 without a reusable second stage can get to LEO the payload of 22.8 metric tons. The Space Shuttle could carry 29 tons of cargo. SpaceX's Super Heavy first stage, redesigned, with added Rocket Lab's "Hungry Hippo" fairing system, could…
Is it true that women might make better astronauts than men?
Published: September 13, 2025 20:38
https://www.nationalgeographic.com/magazine/article/space-travel-four-ways-women-are-a-better-fit-than-men#:~:text=Women%20are%20generally%20smaller.,suited%20for%20long%2Dduration%20missions. This link describes reasons related to reduced metabolic heat…
Why don’t two of these ascans have logos on their blue flight suits?
Published: September 13, 2025 18:39
One has the NASA logo and another has the CSA logo while others are blank. Why is this? https://www.flickr.com/photos/nasa2explore/49238766778/in/album-72157698260056092
Why no proposals I’ve seen for in transit greenhouse modules
Published: September 13, 2025 17:08
Though I do see ideas for them being used to grow vegetables on say mars or the moon. https://www.nasa.gov/science-research/lunar-martian-greenhouses-designed-to-mimic-those-on-earth/ for example. But no one seems to have any ideas that involve using them…
How umbilical detaches from payload fairing with such a great accuracy just before launch?
Published: September 13, 2025 15:56
We know fairing needs cooling system to cool down spacecraft placed inside of it. The air-con system uses GSE unit to provide cool air thru flexible duct to maintain fairing inside temperature. But it must be automatically detach just before launch. Is…
Are EVA suits bulletproof?
https://space.stackexchange.com/questions/69899/are-eva-suits-bulletproof
Published: September 13, 2025 14:11
I know they include Kevlar or something like it and are designed to stop micrometeoroids. Would they stop bullets?
Why do female astronauts need shoulder surgery less often than men?
Published: September 13, 2025 14:01
https://www.quora.com/Are-space-suits-comfy/answer/Sophia-Helene-Mees-de-Tricht?ch=17&oid=32122028&share=2216febb&srid=C044h&target_type=answer This answer on quora says that women are much less likely than men to require surgical intervention due to EVA…
To what extent can a rotary detonation rocket engine (RDE) engine’s exhaust be “gimbaled” (trust vector control) by control of propellant flow?
Published: September 13, 2025 05:59
Rotary detonation rocket engines produce a helical detonation wave which travels around a cylindrical combustion chamber before exhausting out the (nozzle-less) nozzle end. Fuel is fed into the head end of the combustion chamber from a multiplicity of…
Why don’t rotating detonation engines ignite detonation waves in both directions which then self-extinguish when they meet?
Published: September 12, 2025 23:47
Rotating detonation engines (RDE) https://en.wikipedia.org/wiki/Rotating_detonation_engine are annular and symmetric. At ignition, the detonation front propagates in both directions. When they meet 180* later, they should extinguish as they attempt to…
For an electric pump rocket engine like the rutherford engine, is it possible to place the main valve upstream of the pump?
Published: September 12, 2025 16:46
For electric pump rocket engines like the Rutherford engine, the propellant flow/pressure can be easily controlled by the motor, and the main valve can only play a switching role. So is it possible to put the valve upstream of the pump, so that the…
Due to scaling factors of cryogenic insulation, is there a size limit below which TNR rockets have no advantage over chemical rockets [closed]
Published: September 12, 2025 16:01
The Isp of all rockets is limited by the exhaust gas temperature and molecular weight of that exhaust gas. Thermal nuclear rockets’ (TNR) exhaust gas temperature is limited by the same metallurgy which limits chemical rockets’ temperature. The Isp…
In the long run, will Thermal Nuclear Rockets outpace chemical rockets like Starship due to scaling factors?
Published: September 12, 2025 02:55
The Isp of all rockets is limited by the exhaust gas temperature and molecular weight of that exhaust gas. Thermal nuclear rockets’ (TNR) exhaust gas temperature is limited by the same metallurgy which limits chemical rockets’ temperature. The Isp…
How fine was RCS thrust control on the Apollo SM?
https://space.stackexchange.com/questions/69753/how-fine-was-rcs-thrust-control-on-the-apollo-sm
Published: September 11, 2025 20:41
I've wondered about how the Apollo spacecraft could rotate to a specified roll angle (for example) and remain there. I know there were two dead bands available, 5 degrees and a much smaller value that I have forgotten. Say they wanted to rotate by firing…
Has any planetary lander used the paratrooper’s lowering line technique to manage impact?
Published: September 11, 2025 04:38
Paratroopers sometimes use a lowering line to land heavy gear before they land themselves. They can release a heavy pack of durable gear on a tether at a few hundred feet altitude. The pack hits fast and hard. The jumper has a few seconds to decelerate…
Mars Air braking and Landing
https://space.stackexchange.com/questions/69875/mars-air-braking-and-landing
Published: September 10, 2025 01:16
Could it be possible to design a landing vehicle with an indestructible jettison supply package. Fire this at the ground to reduce the speed of the inbound manned vehicle. Changing the inbound trajectory and aiming for the Aganippe Fossa using the…
How did Von Braun calculate in 1953 that a rocket would have to be 3Ă— taller than the Empire State Building to reach the moon?
Published: September 10, 2025 00:32
How did Von Braun calculate in 1953 that a rocket would have to be 3× taller than the Empire State Building to reach the moon? He wrote in Conquest of the Moon (1953), p. 14: It is commonly believed that man will fly directly from the earth to the moon,…