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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197
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6answers
20k views

Can I borrow a lunar rover?

According to Wikipedia there are 3 LRVs sitting on the moon, in very well defined locations. Would China, or whomever gets to the moon with a person next, be able to get in and drive around in an LRV ...
23
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1answer
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If I wanted to reconstruct an entire Apollo mission's crewed spacecraft trajectories, what are the key sources of historical data I'd look for?

The last few images in Robert A. Braeunig's Apollo 11's Translunar Trajectory; and how they avoided the heart of the radiation belts are fascinating and a bit perplexing as discussed in this answer ...
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1answer
208 views

When was the idea behind the DESCANSO Book Series first conceived, by whom, and what is its “mission”?

When was the idea behind the DESCANSO Book Series first conceived, by whom, and what is its "mission"? When I'm looking for information on deep space issues including communications and ...
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7answers
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Why didn't NASA use the shuttle to make a profit?

My understanding is the shuttle was designed as cost-effective workhorse, a space-van to ferry cargo up to the ISS, conduct zero-G experiments and put satellites into orbit. So why didn't NASA take ...
13
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1answer
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Did NASA tell the Skylab astronauts to “Stop running around!”?

This answer to the question starts with: This video may help to answer your question. Starting at about 00:24, you can see an astronaut running around the "exercise wheel" of Skylab (an early NASA ...
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2answers
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What's the baseball bat for? (seen in CRS-8 berthing NASA TV broadcast)

Watching the CRS-8 Berthing live broadcast on NASA TV I noticed a baseball bat resting on top of a console in the front left part of the room, so I took some screenshots. Looking closer, it seems to ...
11
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1answer
981 views

What ever happened to the Asteroid Redirect Mission?

In Robert Zubrin's Moon Direct; A purpose-driven plan to open the lunar frontier (found in the Pod Bay) there is a paragraph that says: Essentially, the gateway is a vestigial form of the Obama ...
10
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1answer
673 views

What ever happened with that pressure suit design based on elastic tension in contact with skin?

I remember several years ago seeing a pressure suit design based on carefully engineered elastic material in contact with the skin. Instead of pressure on the skin produced by a pressurized gas, the ...
4
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2answers
678 views

How will the Lunar Gateway go to L2 and L1; how much delta-v is needed?

In a talk to the press which can be heard in the YouTube video NASA Administrator Jim Bridenstine Explains the Lunar Gateway, NASA director Jim Bridenstine says after about ...
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3answers
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How much of an advantage do equator-proximal launch sites provide?

Comparing ESA's Kourou (5° off) with NASA's Cape Canaveral (28°) and JAXA's Tanegashima (30°) launch sites, how advantageous is proximity to the equator? Considering the fact that the ESA and all of ...
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1answer
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Is this really the Saturn V computer only, or are there other systems here as well?

The BBC News article Apollo in 50 Numbers; The Technology shows an image of the Saturn V's computer along with the caption: The Saturn V's computer was probably the largest computer ever blasted ...
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2answers
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Understanding the information contained in the Deep Space Network XML data?

NASA's Deep Space Network activity can be viewed conveniently at https://eyes.nasa.gov/dsn/dsn.html but if you would like data in a more raw XML form, it can be accessed as described in this answer ...
8
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1answer
444 views

What is the function of this array of what looks like mirrors on TESS?

The Mashable.com article TESS is about to become your new favorite NASA mission shows a beautiful photo of the TESS spacecraft in a state that looks like it is nearly ready to launch. There is a ...
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1answer
179 views

Where would one deploy deep space atomic clocks?

Space.com: NASA IS LAUNCHING A GPS SYSTEM FOR SPACE NASA/JPL news: Five Things to Know about NASA's Deep Space Atomic Clock NASA mission pages clock NASA Deep Space Atomic Clock Fact Sheet The first ...
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How much RF transmit power does DSN need to send commands to Voyager?

I recently looked up how weak the Voyager signals are when they get to Earth from the 22 W transmitters (as of September 2013, it was roughly -245 dBm). But that got me wondering how many watts of ...
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2answers
2k views

Why so many STS-61's?

Wikipedia's STS-61 says that it is not to be confused with STS-61A, STS-61B or STS-61C. Why were there so many STS missions where the name included the number "61"?
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2answers
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How did NASA determine the distance and velocity of voyager 1?

According to Wikipedia At a distance of about 125.97 AU (1.884 × 10$^{10}$ km) from the Sun as of September 9, 2012, it is the farthest manmade object from Earth As of 2013, the probe was moving ...
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2answers
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How does NASA get information from space probes?

So I have briefly gone over answers to how things are stored as from this answer: https://space.stackexchange.com/a/2273/1247 but how is the information sent back? I'm thinking of probes like the ...
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2answers
455 views

What event determined the transfer of control from Kennedy Space Center to Houston?

Launches at Kennedy Space Center in Florida were managed by the on-site launch control center. At some point in the mission, authority was transferred to the mission control center in Houston, Texas. ...
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1answer
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How were Frenet frames and Gram–Schmidt orthonormalization used in spacecraft orbit calculations?

I haven't seen the film Hidden Figures yet, but I have read and listened to some dialogue clips in this NPR Review. In it they mention a Frenet frame and the Gram–Schmidt process for ...
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1answer
214 views

What's next for New Horizons?

Five years ago What's after Pluto for New Horizons? was asked, and the answer turned out to be at first 'something in the Kuiper belt if we can find a good candidate' and finally 2014 MU69. But now ...
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3answers
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Curiosity: Why did they “reinvent the wheel” instead of using pressure tires?

Curiosity rover's wheels seem a bit tired and show signs of wear and tear, as reported for example in this Discovery News article from May 22, 2013. This damage only increased since then and wheels ...
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3answers
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What made NASA shut down the Shuttle program?

Recently NASA shut down its Space Shuttle program. Between the first launch on April 12, 1981, and the final landing on July 21, 2011, NASA's space shuttle fleet --Columbia, Challenger, Discovery, ...
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What missions could be done with Orion on Falcon Heavy?

Orion is being developed in tandem with the SLS. But Falcon Heavy is scheduled to fly earlier, early 2015, and be cheaper. So I wonder what kind of missions Orion could do with FH. Could it for ...
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1answer
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What is the principle behind Mariner 4's “Solar Pressure Vanes”? In what case(s) would they be effective?

The image below, found in this answer shows four "Solar Pressure Vanes" on Mariner 4. I've never heard of such a thing. I can imagine that it might have been thought to help favor the spacecraft's ...
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Does the Dawn spacecraft have the potential for an extended mission?

The Dawn spacecraft is scheduled to arrive in initial orbit around Ceres in February 2015 with a final planned orbital change in December to reduce its orbit to a 700km altitude. At present I can't ...
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2answers
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Does NASA hire foreign nationals as astronauts?

I've dreamed about it ever since I was six, and where I live people laugh at me when I tell them about this because for one, no one's ever been an astronaut in my country and two, I'm a girl. But I'll ...
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1answer
193 views

What is the equivalent of Curiosity's “MSL” in the context of Perseverance? What's the official name of the mission? Are the distinctions similar?

Answers to Where does MSL end and Curiosity begin? explain the difference. There was much fanfare for the naming contest for the Perseverance rover, but I don't know what the mission is called. ...
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1answer
131 views

What GEO relay satellite will the ISS use for end-to-end optical communication with a ground station?

This LEMNOS page on NASA's Explorations and Space Communications site says: The Integrated Laser Communication Relay Demonstration (LCRD) Low-Earth Orbit (LEO) User Modem and Amplifier Terminal (...
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1answer
105 views

What's the method behind this TDRS triplet inclination “madness”?

Previous "method to the maddness" questions: 1, 2. The image below is from Why does TDRS 1's inclination evolve so much differently than that of all the others starting in 1995? and I've used it a ...
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1answer
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Why do the Shuttle's external tanks appear to be rusted?

Wikipedia article states as STS-1 at liftoff. The External Tank was painted white for the first two Space Shuttle launches. From STS-3 on, it was left unpainted. I wonder why the ...
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2answers
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What were the “pills” that were added to solid waste in Apollo 7?

In the BBC News Worldservice podcast 10, 9, 8, 7: The dramatic missions that made the Moon landing possible told by retired astronaut Nicole Stott (Expeditions 20, 21, STS-128 and STS-133) after ...
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1answer
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This BBC photo does not show a replica of Vanguard-1, what might it be?

The BBC news article The World's Oldest Scientific Satellite is Still in Orbit talks about the Vanguard program and that Vanguard-1 is still in orbit around the Earth, and near the end shows a photo ...
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2answers
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Apollo Mission Operations Control Room 2 display, what do these numbers indicate?

There are some really beautiful photos in Ars Technica's NASA’s restored Apollo Mission Control is a slice of ’60s life, frozen in amber See also NYTimes' NASA Reopens Apollo Mission Control Room ...
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2answers
422 views

Could InSight lift off and move somewhere else?

InSight used its built-in thrusters for the final stretch of the Entry, Descent and Landing, and the thrusters seem to still be attached. Would it have been at all possible for InSight to lift off ...
6
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1answer
326 views

Balancing Perseverance Mars Rover; couldn't they just “move stuff around a little” rather than add 6+ kg of dead weight?

The NASA News item NASA's Perseverance Mars Rover Gets Balanced says: Just as an auto mechanic places small weights on a car tire's rim to bring it into balance, the Perseverance team analyzed the ...
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0answers
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How many stages will likely be used to bring NASA astronauts to the Moon's south pole and safely back to Earth?

UPDATE: See Space News' NASA tweaks call for lunar lander concepts which links to: FedBizOpps: Human Landing System - Integrated Lander NASA.gov: NextSTEP H: Human Landing System - Integrated Lander; ...
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2answers
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Where is Lucy going? (asteroid mission)

On Halloween (31-Oct-2018) NASA Goddard announced that Lucy has a green light: NASA’s Mission to Jupiter’s Trojans Given the Green Light for Development All I have are these links which are now ...
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3answers
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How did NASA prevent third parties from spoofing Apollo communications?

The Apollo crews transmitted footage to Earth using SSTV, a ham radio technique that amateurs and pirates can use to send similar messages around the world. Did NASA have any technical ...
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3answers
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What would NASA have done if they knew Columbia was catastrophically damaged?

When the Columbia Shuttle broke apart in 2003, it was known after the launch that a piece of foam had fallen and hit the Shuttle. NASA apparently chose not to investigate it as well as they could have....
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3answers
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Why did NASA use U.S customary units?

NASA was using U.S customary units (inches, feet, nautical miles, pounds, tons, US gallons etc.) during the Mercury and Apollo programmes, and beyond. There are significant disadvantages to using U.S ...
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2answers
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Why don't the Space Shuttle's tires explode in the vacuum of space?

According to this NASA article the tires are inflated to 340 psi (main gear) and 300 psi (nose gear). At landing, there is significant strain, but what about in space? Are the tires exposed to vacuum ...
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2answers
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What's the coin on the Curiosity rover?

The image above was taken from the Curiosity rover (I hope). There appears to be a coin in the image. Is that really a coin or some kind of button? Is it really present on the rover? If it is ...
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1answer
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What are these enclosed regions on the Mission Control Center map?

Whilst watching NASA TV over the years, I've often seen the map on the wall of Mission Control:      "Main Screen in the ISS Mission Control Center", by AGeekMom, CC BY 2.0 In ...
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1answer
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Calculations Apollo astronauts were trained to do by hand if loss of guidance computer and/or data & coms link to Earth?

This answer to the question is it possible to navigate space travel with no computer? currently contains the line Yes, as long as you don't care where you end up but I am not so sure this is true. ...
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5answers
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Do we still have all the blueprints to go to the Moon? [duplicate]

The answer to Do we still have all the equipment to go back to the moon? is an unambiguous "no". Most of the equipment went to museums or got scrapped. But do we still have all the know-how? Say, a ...
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1answer
1k views

How were vibrations supposed to be handled in an Ares I?

The basic concept of an Ares 1 consisted of a five-segment SRB and some liquid-fuelled upper stage. The SRB was derived from the four-segment Space Shuttle SRBs. A similar concept was later promoted ...
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5answers
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Why does a rocket engine provide more thrust in a vacuum than in atmosphere?

According to NASA Each Space Shuttle Main Engine operates at a liquid oxygen/liquid hydrogen mixture ratio of 6 to 1 to produce a sea level thrust of 179,097 kilograms (375,000 pounds) and ...
30
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1answer
5k views

What are these membranes at the aft end of the Shuttle that get torn off during lift off?

The link to the Space Shuttle launch video. At 1:30 mark, three circular disks get torn away. It happens immediately after the engine ignition begins. Here is a cropped image of the Discovery after ...
29
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1answer
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Why were there beeps punctuating the voice communications during missions such as Apollo?

Voice communication between ground and spacecraft during missions such as Apollo seemed to be always punctuated by beeps. What was the origin of these beeps? Were they some sort of unavoidable ...

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