Questions tagged [nasa]

Questions pertaining to activities of the National Aeronautics and Space Administration, a United States government agency that deals with space exploration and research.

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Has the ISP been published for NASAs new rotating detonation engine demonstrator?

Nasa just announced successful testing of their new rotating detonation engine: https://www.nasa.gov/centers/marshall/feature/nasa-validates-revolutionary-propulsion-design-for-deep-space-missions I ...
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Were any of the Apollo astronauts smokers and did that cause any problems?

Onboard the Apollo capsule, the astronauts probably weren’t allowed to smoke because of the risk. Apollo 1 blew up because of a small spark in a pure oxygen environment. Even though NASA changed the ...
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Artemis 1 Low Earth Orbit 16 Nov 2022

As per data the apogee is at 1806 km and changed perigree at 185 km. Thus the orbital period works out to 105 minutes. Assuming perigree raise manoeuvre was at apogee the time taken from apogee to ...
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Can Nuclear Pulse Propulsion (Project Orion) accelerate a 100,000 ton M-type (metallic) asteroid to a LEO? [closed]

Project Orion at NASA was canceled mostly for political reasons (the Nuclear Test Ban Treaty in 1963). Project Orion: specific impulse in the range of 6,000 seconds. For example – Starship ...
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NASA GMAT ver. R2020a installation issue (Windows)

I have several questions regarding how to install NASA GMAT ver. R2020a into Windows. I'm installing it onto a Win10 PC with 16 GB RAM. Meaning, when I downloaded ver. R2016a, there was an included ...
3 votes
1 answer
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How would I calculate the resulting orbit of Dimorphos around Didymos A after the DART mission?

I have been trying to find a way to calculate how the DART mission affected Didymos A, independent of NASA's findings. I found one answer to this question, but it was as if they ignored Didymos A and ...
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Main engine gimballing in Saturn V

The first stage of Saturn V has 5 main F-1 engines, but only 4 of the outer engines can gimbal and the engine at the center was fixed (Source : https://youtube.com/clip/...
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How do spin-stabilized rockets conduct gravity turns?

I was reading this NTRS document about a spin-stabilized solids-only small launcher. The paper mentions that the proposed design (called 428A) will be spin-stabilized during launch and gravity turn. ...
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1 answer
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Impact of Fortran in NASA space programs in modern technology?

I was doing some research on the technology behind the Apollo missions and was quite intrigued by how they made the code given the technical limitations of the time. Do any of you know the ways in ...
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2 answers
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The costs of a single SLS solid fuel rocket booster

Why didn’t Nasa cluster four solid fuel shuttle boosters around an Atlas V booster. The thrust would be substantially more than that of the SLS, with no fueling problem on the launch pad. It would be ...
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What is the point of the Artemis program when we had Apollo? [closed]

Considering that NASA evidently already know how to land astronauts on the Moon (thanks to Apollo), what is the point of the Artemis program? For example, the just-launched Artemis 1 is 1) uncrewed ...
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Why use a fetch copter instead of a fetch rover?

Since the success of helicopter Ingenuity, the ESA rover for fetching samples was cancelled in favor of a helicopter. Why was that? What are the advantages.
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5 votes
1 answer
219 views

Why is the American space program launch site based in Florida and not closer to the equator?

Why is the American space program launch site based in Florida and not closer to the equator? How about taking the ESA as an example and building a launch site on say American Samoa? Much closer to ...
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2 answers
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Why does NASA underestimate their own missions? [duplicate]

This question may be a little vague, so I will explain what I mean by this. Most major NASA missions have had a "Mission Life Expectancy". But I've found 8 times out of 10, the spacecraft ...
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Can DART/Dimorphos impact be seen with naked eye?

Can today's DART/Dimorphos impact be seen with naked eye?
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Why does JWST make images of planets from solar system?

NASA has already made images of planets from the solar system before. So why is NASA/ESA making images of planets from the solar system by using the JWST instead of exploring unseen parts of universe?...
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If Artemis 1 fails, will it be the end of the program?

The Artemis 1 flight was meant to happen years ago. The program is really expensive and the SLS is not reusable. Other companies like SpaceX or Blue Origin are doing things in a much cheaper and ...
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1 answer
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Why was JWST cancelled in 2011?

I saw this table in this section: In the third column from the bottom, it says "Proposed cancel": Why so?
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What happened to the Apollo moon rovers? [duplicate]

I wonder, what happened to the moon rovers? Were they left behind or brought back?
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Most accurate method to find exoplanets?

NASA has found thousands of exoplanets in space using their powerful telescopes. How exactly does NASA do so and what is the best method? I'm assuming that NASA uses some sort of sensor to detect ...
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Why are there so many visible cables on the exterior of the ISS?

Looking at the modules of the ISS every one of them (the Russian ones in particular) seems to be covered by silver and white cables, wires and pipes on the outside. Some of them have been added later ...
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GN&C and more examples for 42 NASA tool

Anyone knows where to find some further examples about 42 applications and examples, mainly relative to GN&C and small satellite Earth missions ( also constellations in case...)? In the repo ...
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When was Apollo 11 scheduled for July 1969?

I recently read on Wikipedia about Apollo 8's interesting schedule history. Basically, a lunar orbital mission was supposed to be an F mission for 1969, with the LEM tested in lunar orbit. But they ...
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Does the post Apollo 13 roast mixtape still exist?

The debriefing party at the Hofbraugarten was merciless, beginning with a parody of the mission. The tape prepared by the Apollo 13 backup crew and the CapComs was not for the thin-skinned. The parody ...
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Why did Spirit (MER-A) lose a wheel?

I was watching a documentary called Expedition Mars: Spirit and Opportunity (It's really good, I recommend it, you can find it on Disney+) and it said Spirit lost control of its frontmost right side ...
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Is there any way to predict if the ISS will lose its signal or to know it directly?

I am currently working on a project by using the ISS livestream: https://video.ibm.com/channel/iss-hdev-payload But sometimes there is a loss-of-signal and it displays a screen that breaks the ...
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Does NASA have any rocket options to replace ISS segments?

Roscosmos has announced their ISS partnership will end in 2 years This might have been seen as an indication that the new administration at Roscosmos was in a more cooperative mood. Any such hopes ...
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What kind of hardware and software does the James Webb space telescope computer use?

What kind of software, operating system, database, processor, architecture, antenna used for communication back to Earth, basically what computer does it use.
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Why didn't JWST include any sensors capable of blue and green visible wavelengths

JWST wavelength sensing starts at 600nm, corresponding to red/orange visible light, and then into the IR. It seems there is no sensor or filter included below 600nm meaning that green and blue light ...
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What is the orange material seen within the window frames of the Columbia Shuttle?

I'm seeing this orange material within the windows of Columbia shuttles -- any thoughts on its precise function? The ISS's Cupola also contains similar international orange bands, though they seem ...
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1 answer
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Why did NASA release JWST image of SMACS 0723 one day before the scheduled time?

A few hours ago, NASA released JWST image of galaxy cluster SMACS 0723 one day before the scheduled time: President Joe Biden unveiled this image of galaxy cluster SMACS 0723, known as Webb’s First ...
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How to calculate Earth to Sun distance given NASA DSCOVR j2000 coordinates

I am using NASA EPIC api to fetch daily earth imagery. Along with the images it also gives certain data regarding the position of certain bodies like sun, earth, moon and satellite itself. These ...
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What is that black thing in center of every star in this JWST image?

I circled that black thing in this image with blue color: The image above, which NASA released on Wednesday (July 6, 2022), represents 32 hours of observing time from JWST's Fine Guidance Sensor.
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Are first official science images of JWST are most far distant images ever taken by space telescope?

In JWST, it says: NASA has scheduled the first official science images release event for Tuesday, 12 July 2022 at 10:30 am EDT/usa. Are first official science images of JWST are most far distant ...
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What percentage of humans could execute the job of astronaut if given the opportunity? [closed]

Becoming an astronaut is notoriously difficult, with something on the order of 0.01% of all applicants getting picked for the job. To a large extent this is inevitable as only a dozen people per year ...
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Are these latest anticipated images of JWST released to public?

I came across this line from here: These latest anticipated images (around 10-20 predicted) however are said to be so beautiful that Associate Administrator for NASA’s Science Mission Directorate, ...
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How long does NASA take to post process JWST images?

My question came from this comment. How long does NASA take to post process JWST images?
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Does NASA already have James Webb Space Telescope's 1st science photos with them?

From this link, it clearly says: The main image release event will take place on July 12 at 10:30 a.m. EDT (1430 GMT). Does NASA already have James Webb Space Telescope's 1st science photos with ...
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1 answer
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Draper Labs' Control Moment Gyroscope Spacesuit

Back in 2013/2014 Draper Laboratory announced that they were designing and testing a "spacesuit jetpack" that employed control moment gyroscopes (CMG) to allow astronauts to preform EVAs ...
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Installation procedure for NASA's Evolutionary Mission Trajectory Generator (EMTG)?

I am doing trajectory optimization, and want to use NASA's Evolutionary Mission Trajectory Generator (EMTG) software to investigate dates for various trajectories. However, this software does not come ...
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Earth to Mars Transfer using GMAT

I saw a couple of people mention here that in order to change the epoch date from the given Mars transfer example on GMAT I would need to change and re-optimize initial conditions. How would I do that?...
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1 answer
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Space Suit for Artemis, why two contracts instead of only one?

NASA has selected two companies to make spacesuits for its Artemis moon program and future International Space Station (ISS) missions. Teams led by Axiom Space and Collins Aerospace (with ILC Dover ...
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NASA GMAT Hardware in the Loop testing

We are currently evaluating various Mission Analysis & Simulation tools, one of which is NASA's GMAT (2020). One of our requirements is for the tool to support HITL testing. However, i am unable ...
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Why "quiet cruise" of a spacecraft would cost NASA 30 mln $ a year?

The 2022 Planetary Decadal Survey (Chapter 22) states that "quiet cruise" phase of an interplanetary spacecraft will cost about 30 million dollars a year for NASA. "Quiet cruise" ...
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Why doesn’t NASA build its rockets using graphene?

Graphene would be a great material to build a rocket out of. Graphene is extremely thin. One single atom thin layer of graphene can withstand 15 000 000 pascal . A square meter of this material only ...
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Why is most of mission control in Houston? [duplicate]

They were already making a mission control at Cape Canaveral, and then decided to move some, but not all, of it to Houston. Why? Wouldn't it make more sense to have the entire mission control in one ...
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What is the purpose of having a planned hold during a countdown for a rocket launch? [duplicate]

NASA had many with the space shuttle, ULA always had a planned hold at T-4 minutes, and yet other launch providers like SpaceX don't. What is the purpose of a planned hold, and why do some launchers ...
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How many lives have space agencies saved? [closed]

Either the agencies themselves, lives saved by a satelitte launched by them, or how many people would have died if not for space services. How many lives have space agencies saved?
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Does NASA's Titan explorer Dragonfly have a microscope? How will it observe potential microbial life?

One of NASA's stated goals with the Dragonfly mission is to "study astrobiology, prebiological chemistry, and the potential habitability of an extraterrestrial environment." I would think it ...
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What formation-keeping software does MMS use?

The Magnetospheric MultiScale (MMS) mission is a NASA mission consisting of four satellites arranged (at apogee) in a tetrahedral formation. According to this 2015 source: On Oct. 15, 2015, a NASA ...
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