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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 continued monitoring of the Voyagers probes been in danger of being discontinued, and if so, how many times?

I assume the continued monitoring of the Voyager probes has been part of the annual NASA appropriations and authorization, NASA Appropriations and Authorizations: A Fact Sheet, for example. Have there ...
Bob516's user avatar
  • 6,999
17 votes
2 answers
2k views

HST can apparently operate in one-gyro mode, if need be. Why was the Compton Gamma Ray Observatory de-orbited when it lost one of its three gyros?

If HST has been reduced to 2 fully functioning gyros, I read that they plan to turn off one gyro and run in single-gyro mode to save the second functioning gyro. The Compton Gamma Ray Observatory had ...
Peter Milne's user avatar
1 vote
0 answers
33 views

Has NASA published any information that better quantifies the mass budget requirements for "back to the moon ... this time to stay"?

I'm interested in those elements of their plans that will help me to estimate a yearly mass budget, such as how many crew at a time, how long will they stay each time, how often they will be rotated ...
phil1008's user avatar
  • 6,098
4 votes
1 answer
258 views

Unable to find Incident Report for aborted launch of first Shuttle flight

There is an amazingly well writen report on the aborted launch of the first(?) shuttle because the computers did not sync up. I remember reading this report and it being fascinating and prescient ...
Edgar H's user avatar
  • 143
23 votes
5 answers
8k views

What is SpaceX doing differently with their Falcon 9 so that it doesn't cost as much as the Space Shuttle?

SpaceX has been launching and reusing their Falcon 9 for very cheaply quite often. Even though it is quite revolutionary, it is isn't the first time a rocket has been reused. The Space Shuttle side ...
User1's user avatar
  • 360
10 votes
1 answer
1k views

How much will NASA save by shutting down the Chandra X-Ray Observatory?

Dr Patrick Slane, director of the Chandra X-ray Center, has sent A Letter to the Chandra Community explaining that NASA plans to close down the Chandra project due to budget constraints. NASA say that:...
Dave Gremlin's user avatar
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3 votes
3 answers
195 views

Why is NASA waiting until Artemis V to bring a rover?

Crewed moon rovers will be a 55 year old technology by the time Artemis III and IV launch, and historically they greatly increased the amount of time lunar astronauts could spend doing science instead ...
qazwsx's user avatar
  • 986
0 votes
1 answer
172 views

Does Raptor rocket engine of SpaceX include a cracker or fuel conversion system to crack the hydrocarbon fuel into its constituents?

In the Raptor rocket engine, where is the hot turbine exhaust gas transferred, when gaseous fuel arrives from the heat exchanger? Does the Raptor rocket engine include a cracker or fuel conversion ...
Lakshay's user avatar
  • 11
3 votes
3 answers
2k views

Why didn't NASA launch communications relay satellites outside the asteroid belt to communicate easily with interstellar satellite?

I came across with nasa's voyager and other interstellar satellite, just thought that if they build a relay satellite which situated outside asteroid belt or nearby to Saturn & Jupiter, to ...
Ashay baghele's user avatar
10 votes
2 answers
1k views

How were the control surfaces of the Space Shuttle designed to withstand the forces of reentry?

Perhaps the most critical part of the Shuttle's flight is the communications blackout phase of reentry, when atmospheric plasma is directly interacting with the vehicle's heat shield. As I understand ...
ijustlovemath's user avatar
11 votes
3 answers
2k views

An alternative architecture for a mission to Mars

This image, which is supposed to represent the current architecture of the mission to Mars by NASA, raised a wave of emotions. People find it too long and complicated. But is it really possible to ...
Saturn V's user avatar
  • 1,335
2 votes
1 answer
132 views

How to make a velocity(time) XYplot graph in NASA's GMAT R2022?

I'm wondering how to design a graph in NASA's GMAT (Version R2022a), which shows satellite's linear velocity on time or on altitude from primary body (Earth). When I open the XYplot design window ->...
Asni's user avatar
  • 23
7 votes
1 answer
281 views

Is the Falcon 9 or Falcon Heavy allowed to launch nuclear material?

Certain missions, like the various NASA Mars Rovers (Curiosity, Perseverance, Opportunity, etc.) contained either RTGs for power generation or RTHs for heating purposes, and these contain nuclear ...
Dragongeek's user avatar
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0 votes
1 answer
83 views

Difference between UTCGregorian and A1ModJulian or UTCModJulian in GMAT?

I have a question related to this question. I have computed several propulsive maneuvers required for GEO orbit acquisition using the Target feature of NASA GMAT 2022a and saved them to a maneuver ...
patowski1981's user avatar
1 vote
0 answers
101 views

What are the prelaunch procedures that astronauts follow before the launch?

What procedures do the astronauts follow, like the suit-up procedures and communication checks that happen before the launch. And how will the astronaut's family meet the astronauts prior to the ...
Ranjith's user avatar
  • 11
1 vote
0 answers
104 views

Aspiring to Build a Space Rover from Scratch – Where to Begin? [closed]

What fundamental concepts, beginner-friendly resources, or online courses would you recommend for someone starting with little to no background in robotics? At first, I want to build a an autonomous ...
Md Ghufran Fazal's user avatar
39 votes
4 answers
13k views

Before we build a Mars colony, why don't we build a 100% self-sustainable test colony in the Antarctic?

Before we go to Mars, why don't we build a sealed dome self sustaining colony in the Antarctic? One that can heat itself, recycle all materials, water and waste. Grow enough plants to produce oxygen ...
Bretton Ferguson's user avatar
3 votes
1 answer
312 views

Where can I find the video of Apollo 16 floodlight mistaken with a UFO?

So, a few years ago (2004) NASA showed that a picture of a supposed UFO captured by the Apollo 16 astronauts through the window of the Command Module was in fact the floodlight protruding from the ...
Swike's user avatar
  • 2,501
0 votes
0 answers
172 views

Live_ISS_Stream stopped?

so I've come across this video, 11 hours of ISS transmissions during 2021 ASAT incident by Russia. The description says the footage was archived from this IBM stream site, so I've looked to see if it ...
user52175's user avatar
3 votes
1 answer
379 views

Why is ISRO planning to launch Aditya-L1 if NASA has already launched the Parker Solar Probe?

If both the ISRO’s Aditya-L1 and NASA’s Parker Solar Probe have almost the same key objectives, then why is ISRO planning to launch Aditya-L1? Is there a specific reason or purpose for this decision?
Bunny Mos's user avatar
12 votes
1 answer
1k views

What was the Modified Apollo option for a potential LEO transport?

In this website (scroll to the bottom), it mentions that ” Nixon’s advisors and NASA officials shifted their attention to developing a new transportation system to low Earth orbit. Options included a ...
Blue Skin and Glowing Red Eyes's user avatar
2 votes
0 answers
76 views

Is there a labelled equivalent of the NASA 4K moon texture files?

Does anyone know whether a labelled version of the NASA 4k moon texture files exists with the same projection? I would like to be able to overlay and switch between the photographic versions, and a ...
tomh's user avatar
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5 votes
1 answer
249 views

"Received power" on NASA's DSN web page

Out of curiosity, the "received power" shown for a spacecraft on NASA's "DSN now" web page 1 - is that at the receiver, or at the antenna? I'm looking at one of the antennas now ...
ELaw's user avatar
  • 51
22 votes
4 answers
4k views

How do space probes find their way and how much fuel do they use to travel?

How do space probes find their way, for example, to explore dangerous planets like Jupiter or Saturn that have powerful magnetic fields? Do scientists control it from stations in NASA or they have a ...
C.F.G's user avatar
  • 329
1 vote
0 answers
59 views

Using NASA Horizons with Celestrak Socrates's TLE CDMs?

Has anyone succeeded with getting a list of Collision Data Messages (CDMs) from nice sites like Celestrak in order to feed them into NASA Horizon's ephemeris computation service. These would include ...
user avatar
0 votes
1 answer
163 views

Turbo code used in New Horizons - encoding coefficient?

I know that New Horizons uses turbo code with r=1/6 for space communication1, however I don’t know which is the encoding coefficient, because I din’t think it could be 6, it seems it high. Could you ...
Spaceman's user avatar
6 votes
1 answer
100 views

Were there any submissions to NASA's solicitation for 'Lunar Surface Site Preparation' studies in 2022?

Prompted by a now deleted question about practicalities of operating a SpaceX Starship from unprepared terrain on the moon I found this 2022 solicitation for studies around 'Lunar Surface Site ...
GremlinWranger's user avatar
1 vote
1 answer
86 views

NASA CAPSTONE Radiation shielding

What solutions in radiation shielding or radiation effect mitigation were made on the NASA CAPSTONE mission? Specifically, anything related to radiation shielding is of interest. I'm having trouble ...
Benjamin Åkerlund's user avatar
1 vote
0 answers
117 views

Is it planned to have the NASA astronauts from the Artemis 2 mission fly again to the moon?

Just recently, NASA announced the astronauts who will fly to the moon (Which is pretty AMESOME!). Is it planned to fly them on another Artemis mission or are the Artemis astronauts only flying once ...
The Rocket fan's user avatar
4 votes
1 answer
495 views

How does SpaceX get through regulatory issues so quickly?

"Regulatory" isn't the right word, but I don't know what is. For example, SpaceX seemed to be able to prove to NASA's satisfaction that they were sufficiently safe to use for crewed launches ...
fectin's user avatar
  • 1,019
3 votes
0 answers
239 views

How is this estimation so off?

Based on the recent NASA's DART mission, I wrote some code to calculate the satellite's distance and relative velocity based on the the size of Dismorphos (the target asteroid) on the camera frame. ...
808kalli's user avatar
5 votes
2 answers
1k views

After SLS, what is the next rocket building project for NASA?

I know that ESA is working on a new reusable first stage booster. Does NASA have similar plans?
Star-SpaceX's user avatar
7 votes
1 answer
1k views

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 ...
David's user avatar
  • 1,001
30 votes
3 answers
7k views

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 ...
The Rocket fan's user avatar
-4 votes
2 answers
226 views

Can Nuclear Pulse Propulsion (Project Orion) accelerate a 100,000 ton M-type (metallic) asteroid to a LEO? [closed]

Project Orion: specific impulse in the range of 6,000 seconds. For example – Starship Interplanetary (SpaceX): Max Fuel (after refueling at orbit) - 1,950 ton Fuel left after arriving at NEO asteroid –...
user avatar
2 votes
1 answer
195 views

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 ...
iL0g1c's user avatar
  • 21
2 votes
1 answer
272 views

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/...
Prasanna B's user avatar
6 votes
0 answers
89 views

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. ...
WarpPrime's user avatar
  • 3,125
2 votes
1 answer
348 views

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 ...
Logimite's user avatar
0 votes
2 answers
807 views

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 ...
James Tosky's user avatar
1 vote
1 answer
540 views

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 ...
Allure's user avatar
  • 309
5 votes
1 answer
182 views

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.
user avatar
5 votes
1 answer
234 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 ...
Amedeo Felix's user avatar
2 votes
2 answers
233 views

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 ...
Deko Revinio's user avatar
  • 1,474
0 votes
1 answer
389 views

Can DART/Dimorphos impact be seen with naked eye?

Can today's DART/Dimorphos impact be seen with naked eye?
fdkgfosfskjdlsjdlkfsf's user avatar
6 votes
1 answer
2k views

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?...
M. Pedro's user avatar
  • 461
0 votes
3 answers
307 views

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 ...
The Rocket fan's user avatar
2 votes
1 answer
847 views

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?
M. Pedro's user avatar
  • 461
3 votes
1 answer
2k views

What happened to the Apollo moon rovers? [duplicate]

I wonder, what happened to the moon rovers? Were they left behind or brought back?
Deko Revinio's user avatar
  • 1,474
0 votes
0 answers
41 views

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 ...
DialFrost's user avatar
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