Newest Questions
19,853 questions
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Movement of space craft vehicle
I further explain with the exact question in a detailed as follows The initial (3-2-1) euler angles yaw, pitch and roll of a vehicle are (alpha, beta, gamma) = (40,30,80) deg. Assume the body angular ...
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Movement of space vehicles
Why the euler angles or any other methods which are being used to find out the movement of spacecraft using iterated rather than integrated to find yaw, pitch, roll of the spacecraft?
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On the HOPE (human outer planet exploration) proposals are there any details on how the interior of the lander for Callisto would be laid out?
I understand it’s outdated but I’m asking this out of curiosity. I’ve found this link for the exterior but nothing on the interior. https://www.projectrho.com/public_html/rocket/realdesigns3.php
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Maximum "emergency" speed of an astronaut moving on the moon
As part of their redesigned moon campaign, NASA announced plans for a pressurized Moon rover (p. 22 of the PDF). Its proposed maximum speed would be 3.5 km/h, pretty exactly the speed of a regular ...
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What are these straps on these common pressure suits?
Several popular space suits designs feature a strap running from the crotch up to the collar.
American Advanced Crew Escape Suit
Soviet/Russian Sokol(-KM)
It's tied to a pulley that hangs off a steel ...
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Where can I find video of someone struggling to get into the Lunar Module with a rope?
I am reading One Giant Leap by Charles Fishman, which recounts some aspects of the history of the Apollo program. A considerable portion of chapter 7, "How do you fly to the Moon?", is ...
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More information on an electrical outlet on the Lunar Module Descent Stage?
While once again looking into What is this beige, pill shaped object on the back of the Apollo Lunar Module? I came across the December 1967 Grumman Lunar Module Subsystem Assembly and Installations ...
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Mathematics prerequisites for GNC engineers focusing on trajectory optimization and non-linear spacecraft attitude control
I am a graduate student starting research in Spacecraft Dynamics and Control . My primary focus is on trajectory optimization and advanced attitude control .To build a solid theoretical foundation, I ...
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Canted Antenna for spacecrafts
I am designing a 6U CubeSat with a canted turnstile antenna for reception since the payload includes an SDR. I couldn’t find clear resources on how to properly build and simulate the antenna mounted ...
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How do Mars colonization plans address 0.38G being insufficient for healthy human development?
If humans plan to live on Mars long-term, how do proponents address the fact that Mars gravity (0.38g) is likely insufficient for healthy human development?
There's been a lot of excitement lately — ...
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If an object orbits closer to the sun than Mercury, what is the upper bound on its size?
For the sake of this question, exclude artificial objects (which, as far as I know, is just the Parker Solar Probe).
As far as we know, Mercury is the closest object to the sun. There is certainly not ...
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Micrometeoroid shielding for radiators? Is this a thing at all?
Shielding against hypervelocity impacts is a thing, like a whipple shield. Easy enough for many things, like various habitat modules.
But radiators are required to be very large in size, particularly ...
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What are examples of part task trainers that are in building 9 at JSC?
I know the main focus of this particular building is mockups but it also includes ARGOS , POGO and the precision air bearing floor in addition to part task trainers.
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What are advantages of putting a display on a glove instead of in a helmet head up display?
https://www.intelligentliving.co/new-spacesuit-glove-can-control-robots/
This EVA glove which is currently in development would allow astronauts to control moon rovers and drones on mars by hand ...
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Holding the liquid engine nozzle in horizontal condition
During horizontal transportation and tilting of rockets with cluster engines, The engines may sag and nozzles will touch each other. Since the control actuators are not powered how the nozzle is kept ...
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Reliability vs. Recycling efficiency trade-offs in closed-loop life support for Artemis-Class Missions
For long-duration crewed missions beyond low Earth orbit, what are the documented trade-offs between closed-loop Environmental Control and Life Support Systems (ECLSS) recycling efficiency and system ...
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How is torque from the Pistol Grip Tool managed to prevent spinning the astronaut?
https://videos.space.com/m/jV72gOBX/pistol-grip-tool-developed-for-hubble-servicing-mission-2?list=eV3atOv7
Astronauts on the ISS routinely use a Pistol Grip Tool PGT during EVAs. It is a variant of ...
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Why doesn't differential radiation pressure cause objects in space to spin faster and faster forever?
Imagine an asteroid, or a piece of space debris. In the general case, it is unlikely that the solar radiation pressure it is exposed to will be perfectly balanced across its surface. In the extreme, ...
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Any plans to use the pistol grip tool or anything like it on surfaces of say the moon or mars?
Or its purpose for drilling and driving fasteners exclusive to ISS or gateway EVAs? Is it a specialized instrument that is strictly Hubble and ISS specific?
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Is it correct that rocket reuse is much more difficult for the upper stage than the lower stage?
Whilst looking at comparisons of various launch vehicles, both actual and conceptual, one thing that was repeated over and over is the idea that returning to Earth from orbit is the hardest part of ...
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Any information on the number of NBL runs , ARGOS runs and amount of time in field geology sites during training for lunar surface EVAs?
I want to know the ratio between ARGOS (active response gravity offload system)and nbl (neutral buoyancy labratory) time. I know 1/6 negative weigh outs are much more challenging and water drag is ...
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What is known about the extent of the damage to the Columbia shuttle wing prior to re-entry during the STS-107 mission?
Various news reports in the months/years after the loss of Columbia say that the foam strike during STS-107 created a hole in the shuttle's wing.
But the Columbia Accident Investigation Board report ...
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Engineering Challenges of Lunar Power Distribution: Managing Power Transformers in a Vacuum and Radiation Environment [closed]
As plans for long-term lunar habitation (such as the Artemis program) progress, the need for scalable power distribution—likely involving AC microgrids—becomes critical. However, standard terrestrial ...
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Where is training for the Space Station Remote Manipulator System conducted?
And what building or buildings are robotics workstation trainers in in Houston or does it vary there between part task trainers and the mission simulation environment?
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Calculation of TLE-like elements from osculating state vectors
I have simulated a time series of state vectors for a geostationary satellite, and I would like to calculate corresponding TLEs for this satellite. The simulation includes perturbations from Earth’s ...
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Identify this NASA project
My grandfather was an Aerospace Engineer within the Air Force (often working for NASA) from 1957 to 1982. I have this group photo of him, presumably on a NASA project, with his collaborators standing ...
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Why are the landing legs on the proposed Starship HLS so small?
A more stable design would be landing legs that extend outwards from close to the top of the cylinder and have a brace bar that locks in place once they are fully extended.It would like kind of like a ...
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What will Curiosity do when it no longer has any quartz cups for solid sample evolved gas analysis?
The Curiosity rover's SAM instrument has 74 cups available in which to do certain experiments. Nine of these are for "wet chemistry" experiments and 59 are for "dry" experiments; ...
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Has anyone had a thought about what humanity's policy should be about artificial light on the Moon? [closed]
For circa 4 or so billion years life on Earth has looked up at the funny, or awe-inspiring, thing in the sky called the Moon. Every 28 days or so it's always been "new" and then gradually ...
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What happens to SLS boosters when they are expended in the ocean?
I understand that the SLS solid rocket boosters and core stage are designed to be expendable, and will crash into the ocean at terminal velocity. Presumably, when that happens, it results in a large ...
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Could a conventional rocket design be used for SSTO if the payload was proportionally very small?
Most designs for SSTO (single-stage-to-orbit) launch vehicles that I have seen are not what you would call "conventional" rocket vehicles; they usually have wings and/or air-breathing ...
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What robots are planned to be used on the lunar surface during the Artemis program?
And what are their purposes? I only know about one that is part of a new rover in the form of a robotic arm to collect samples.
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Do the orange Artemis IVA suits include parachutes?
I know they did for the shuttle but do the Artemis derivatives also have them?
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Why is the Falcon 9 rocket's gas generator exhaust outlet covered with wire mesh?
Image from https://www.thespacetechie.com/octaweb-structure/
From this image, we can see the exhaust outlets of eight gas generators (the center one's location is unclear). It's visible that the ...
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Does NASA have any plans to replace the T38 with anything else?
If yes what other aircraft will they replace it with. I understand it is critical for space flight readiness training but is aging. Or will it be retired without a replacement due to something about ...
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Any information on what suit qualification runs for lunar surface EVAs are like?
I know for microgravity EVAs outside the ISS this first NBL run focuses on translation and the body restraint tether , foot restraints and the pistol grip tool. What does it look like for partial g ...
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Is there research to indicate that high CO2 levels confer radiation resistance?
I am reading Endurance by Scott Kelly. I came across a passage I found surprising. In Chapter 5, he spends a while discussing the highly elevated CO2 levels on the ISS, and talks about their CO2 ...
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Looking for steps to create a CubeSat from scratch [closed]
My university professor wants to create a CubeSat and hopefully one day launch it. I am working with him on it and we are starting from scratch. I have been looking all over the internet on how to ...
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Gravity assist influence planet velocity
I have found the physics proof that shows the module of the vectorial velocity speed variation of gravity assist for a planet at rest is at maximum twice the initial speed of the probe.
However i’m ...
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What was used to lift the Apollo capsule off the moon and how come it took less energy to get back to earth
It took tons of fuel to leave earth from gravity and the speed of which it spins and travels thru space, big tanks of fuel and jet packs to direct it to the moon why it didn't need all that to return ...
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Resolving the 6.57 kg Propellant Discrepancy in SEDS-2 Mission Data: Work-Energy Theorem vs. COAM [closed]
Note: This question seeks a technical explanation for a specific numerical discrepancy in a NASA mission report (NASA-TM-108453) and is grounded in the Work-Energy Theorem. It is not a request for ...
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Why is Chandrayaan-3 described as the first mission to land in the Moon’s south polar region despite landing at ~69° S latitude?
Chandrayaan-3 is often described as the first mission to achieve a soft landing in the lunar south polar region.
However, the Vikram lander touched down at approximately 69° S latitude, which seems ...
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Why didn't NASA have cameras monitoring the re-entry of STS-107 Columbia?
I was recently rewatching the mission control footage from the re-entry of Space Shuttle Columbia during STS-107:
At the 12 minute mark in the recording, you can see the ...
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Would Voyager missions be realistic without gravitational slingshot?
I understand that a fair amount of the velocity of Voyagers are based on gravitational slingshot effect. For example, this Wikipedia animation shows increase from 13 km/s to 24 km/s after utilizing ...
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Why does a Falcon 9 have 3 "streamers" when launching?
A Falcon 9 launched from California last night, visible in Arizona:
Why does it have 3 "streamers"? What exactly from the exhaust is illuminating the air?
When the 🚀 got high enough ...
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Impact of closing the library at the Goddard Space Flight Center
The U.S. government is apparently closing the NASA Goddard Space Flight Center Library.
What is the impact on the space community, including but not limited to the contributors here? I understand that ...
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Is placing a termic shield of 3 million kms2 in L1 doable in the near future? [closed]
A termic shield of 3 million kms2 in L1 could block 3% of light arriving to Earth by creating a light shadow, and it would drop 3-,4,5% global temperature. SpaceX says it wants to build Starfactory ...
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Feasibility of maintaining a spacecraft near Sun–Earth L3
I am evaluating a conceptual space-weather monitoring architecture using spacecraft at Sun–Earth L1, L4, and L5. For completeness, I considered adding a spacecraft near the Sun–Earth L3 point. I am ...
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Switching to Earth-centered satellite trajectory propagation using JPL ephemerides
With the holidays coming up, I have some free time and would like to continue working on an orbit propagator I’m developing in Python.
Current setup:
Planetary and lunar positions are taken from JPL ...
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Could a Falcon 9 easily be fitted to carry a nuclear payload?
I'm not familiar with ICBM design. Could a Falcon 9 serve as one pretty easily? If so, what limitations would a Falcon 9 ICBM face compared to existing ICBMs?
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