Questions tagged [voyager]

The Voyager program is an American scientific program that launched two unmanned space missions, the probes Voyager 1 and Voyager 2. Although they were designated officially to study just the planetary systems of Jupiter and Saturn, the space probes were able to continue their mission into the outer solar system, and they are expected to push through the heliosheath in deep space.

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What was the mass flow rate of the Titan IIIE stage 1 during the voyager 1 launch

I am doing a project and I cant seem to find an exact value for the mean mass flow rate of the Titan IIIE booster during stage one of the voyager 1 launch?
owinius's user avatar
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How beaten up would Voyager 1 be in 40,000 years?

How much damage would there be, both physically and to the computers, memory etc, upon arrival to Gliese 445 in 40k years by radiation and interstellar debris?
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Creating an animation short and need orientation info

I'm creating a short film celebrating Voyager 1's progress out of our Solar home. I would like to be as accurate as possible. Question: What is the craft's normal orientation as it travels? Is the ...
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6 votes
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Why did Voyager not use error correction coding for uplink?

Error correction coding was used for downlinked Voyager data, but why not for the uplink direction (if I'm correct in thinking it wasn't)? According to Edelson et al. 1979 "Voyager ...
Larry Gilman's user avatar
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Was there a close call for Voyager 2's extended mission due to lost uplink during the Jupiter encounter?

In Uplink-Downlink (2001), Douglas Mudgway says: "[The Jupiter radiation environment] . . . resulted in loss of the uplink connection with the [Voyager 2] spacecraft on the day after encounter. ...
Larry Gilman's user avatar
6 votes
1 answer
274 views

How does NASA ensure nobody else communicates with probes? [duplicate]

We often hear about how various parts of Voyager have been turned off or on, or how course corrections have been made. How does NASA know that nobody else on Earth can send instructions to a probe? It ...
Marnanel Thurman's user avatar
14 votes
1 answer
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How likely is it that the Voyager spacecrafts haven't yet been damaged by micrometeoroids?

Both Voyagers have been traveling at over $60,000$ km/h for well over four decades and still seem to function properly, taking into account the slowly dropping power and warmth available from their ...
Tfovid's user avatar
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What is the beam width of the antenna of Voyager 2?

There is a communication pause with Voyager 2 since July 21, the antenna points 2 degrees away from Earth. A series of planned commands sent to NASA’s Voyager 2 inadvertently changed the antenna ...
Uwe's user avatar
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Is there someone continually monitoring the Voyager spacecraft?

I just finished watching The Farthest, a great documentary about the Voyager spacecraft, launched in 1977 and still operational today. It got me wondering about those people shown in the documentary ...
Stu Smith's user avatar
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3 answers
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What changes to Voyager could have been made? [closed]

If during the planning and construction of the Voyager missions they knew what we know now, what changes to the missions would have been most helpful in augmenting the science obtained?
user277093's user avatar
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Will NASA abandon the Voyager spacecraft?

according to sindibad (a website) the voyager space mission is coming to an end. How long until this happens. according to the website, NASA wants to end the mission while the probes are still ...
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Mathematical description of the flight trajectory parameters of voyager 1

I would like to run in some simulation software an end-to-end simulation replicating the flight of voyager 1. I am somewhat conversant with GMAT that I think would have this capability or perhaps ...
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How would I or who/what could help me find the trajectory of an "Extended Grand Tour" spacecraft, without having to take a long course on the subject?

(As forewarning, the most integral details of this question are bolded.) For context, I have been writing an alternate history involving the accelerated development of spaceflight technology for over ...
Grant Hartlage's user avatar
7 votes
1 answer
229 views

What is wrong with Voyager 1 attitude data telemetry? Is there a test version of the computer available?

There is a problem with Voyager attitude data telemetry. While the spacecraft continues to return science data and otherwise operate as normal, the mission team is searching for the source of a ...
Uwe's user avatar
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Where in the constellation Camelopardalis is Gliese 445?

Gliese 445 (Gl 445 or AC +79 3888) is an M-type main sequence star in the northern part of the constellation Camelopardalis. In about 38,000 years Voyager 1 will make its closest approach to it. ...
Alan O'Rourke's user avatar
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What was the avg temperature of Voyager 1 before it warmed up it’s cameras for the ‘Family portrait’ photo in 1990

In 1990, it took Voyager 1 three hours to warm up its cameras for the Family Portrait photo looking back at our solar system. What was the temperature of the camera before the warm up, or at least the ...
Alan O'Rourke's user avatar
14 votes
2 answers
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What were the speeds of Pioneer 10 and Voyager 1 when Voyager overtook it in 1998?

On the 14th of February 1998 Voyager 1 passed Pioneer 10 to become the most distant human-made object in space, 10.4 billion kilometres from Earth (69.4 AU from the Sun). What were the speeds of ...
Alan O'Rourke's user avatar
4 votes
1 answer
224 views

What type of galactic orbit will the Voyager probes have?

I know that they will eventually get close (within 10,000 light years) of our solar system, but will the orbit be circular or elliptical, around how much eccentricity, what would be a reasonable ...
Starship - On Strike's user avatar
3 votes
1 answer
464 views

How does the signal strength from the Voyager probe change with distance?

How does the signal strength from the Voyager probe change with distance? Where I can find this data?
user1785960's user avatar
4 votes
0 answers
427 views

Are circuit diagrams available for the Voyager spacecraft telecommunications systems?

I'm particularly curious about the coherent transponder mode where the outgoing transmitted signal is phase-locked to the incoming received signal (prompted by @uhoh's recent question). This is a mode ...
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By when can we pass by Voyager 1?

I am just curious to know if there is any estimation, no matter how rough it could be, about when another human artifact can go farther than Voyager 1 with respect to the Earth; years, decades, any ...
Mehdi Abbassi's user avatar
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1 answer
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If Voyager 1 were to return to the Earth now, how much "younger" it would be than its replica displayed at JPL's Von Karman Auditorium?

Just out of curiosity, based on Einstein's special relativity theory, if Voyager were to return to the Earth now at the same average speed at which it flew to its current position, how much "...
lemonincider's user avatar
1 vote
2 answers
235 views

How many watts of electricity are available for systems during a Mars transit?

The 40+ year old Voyager probes have three Radioisotope Thermoelectric Generators (RTGs) currently producing 249 watts, losing around 4 watts per year. They began with 470 Watts. The Curiosity Rover's ...
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What happened to Voyager 2's tracking loop capacitor? How did it get damaged? What is it for? What's a tracking loop anyway?

On 23-Aug-2021 Voyager 2 tweeted: DSN antenna DSS-43 at @CanberraDSN is starting a 300 min listen to hear the echo of a command tone sent up to me 35 hours ago. This will define the "Best Lock ...
uhoh's user avatar
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2 votes
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If the Kuiper belt is only about 50 AU thick and Voyager 2 is 153 AU away then it has to be in the Oort cloud?

Kuiper belt is 50 AU thick....correct? Oort cloud touches Keiper belt....correct? Neptune is 31 AU away. That means Voyager 2 at 153 AU is beyond the Kuiper belt So where is it??
clarence baker's user avatar
12 votes
3 answers
563 views

What image compression algorithm did the Voyagers use?

Recently, Reed-Solomon error correction codes were discussed: How is stacking oranges in 24 dimensions related to receiving and decoding signals from the Voyagers? Whilst the craft were between ...
SE - stop firing the good guys's user avatar
4 votes
1 answer
286 views

If the Voyagers' lowest playback speed is 7200 bits per second, how can it transmit to Earth at only 160 bps?

How to calculate data rate of Voyager 1? mention's Voyager's data rate is currently 160 bits per second, and clicking on a recent entry in the Voyager DSN Tracking Schedule on the Voyager Mission ...
uhoh's user avatar
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Did the Voyager spacecraft use a Golay, a Reed-Solomon and/or a Hamming code for data transmission encoding for error correction? (Need clarification)

The now-famous answer to How is stacking oranges in 24 dimensions related to receiving and decoding signals from the Voyagers? is worth stopping now here and going back and reading first. Okay welcome ...
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What Voyager spacecraft hardware performed transmitted data coding in such a complicated way? Did ground decoding use “a big monster filling a rack”?

The now-famous answer to How is stacking oranges in 24 dimensions related to receiving and decoding signals from the Voyagers? is worth stopping now here and going back and reading first. Okay welcome ...
uhoh's user avatar
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How is stacking oranges in 24 dimensions related to receiving and decoding signals from the Voyagers?

I was listening to Sphere Packing Solved in Higher Dimensions; A Ukrainian mathematician has solved the centuries-old sphere-packing problem in dimensions eight and 24. and reading the transcript ...
uhoh's user avatar
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How to get the Voyager Golden Record music?

This link https://voyager.jpl.nasa.gov/golden-record/whats-on-the-record/music From NASA lists the tracks in the Golden Record sent to outer space. Has anyone come across an easy way to actually ...
Sergiy Lenzion's user avatar
12 votes
2 answers
604 views

Can ESA control the two Voyager spacecraft?

This is such a dumb question. There are many space organizations. Let's take ESA for this case. Given the two Voyager spacecraft are transmitting a weak radio signal to the Earth, can ESA command and ...
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Just how much "dumb luck" was reaching the space age during the "Grand Tour" opportunity? Would we have been SOL 1050 or 2100 years before/after?

@OscarLanzi's answer to Why is the gas giant grand tour interval 175 years when the synodic period of Uranus and Neptune is 171 years? is an excellent answer describing a subtle situation; each pair ...
uhoh's user avatar
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21 votes
2 answers
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What is the ninth planet on this image from the Voyager Golden Record?

Looking through the content of the Voyager Golden Record, I came across these two images: schematic of the solar system, part 1 schematic of the solar system, part 2 The first nine circles obviously ...
otterstorm's user avatar
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162 views

How much do the Voyagers' attitudes drift over time? How often are their thrusters used for attitude control?

@Hobbes' answer to Voyager 1's tape recorder and other angular momentum management issues says: There are no reaction wheels on Voyager [...] Voyager is not spin-stabilized. It used thrusters for ...
uhoh's user avatar
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1 answer
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Where is Voyager 1 now (2021)?

I remember seeing that Voyager 1 is currently in interstellar space and will continue to move indefinitely. I however could not find the reference of where (in the vicinity) Voyager 1 is now. Is it ...
GENIVI-LEARNER's user avatar
37 votes
3 answers
12k views

Why do exploration spacecraft like Voyager 1 and 2 go through the asteroid belt, and not over or below it?

I understand the risk of hitting an asteroid is small, but I'm wondering if there's a reason spacecraft usually stay on the main Solar System orbital plane.
amorimluc's user avatar
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What is the bandwidth (in hertz) of the Voyager 2 radio receiver?

Does anybody know the bandwidth of the Voyager 2 radio receiver's front-end? I know that the current data rate of the receiver is of order tens of bits per second, and I have one estimate of 18 Hz. ...
John's user avatar
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8 votes
3 answers
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When will Voyager 2 overtake Pioneer 10 as the 2nd most distant spacecraft from the Sun?

As of November 2020, Pioneer 10 is the 2nd most distant spacecraft from the Sun and Voyager 2 is the 3rd. However Voyager 2's heliocentric velocity is significantly higher than Pioneer 10 and it seems ...
user177107's user avatar
5 votes
1 answer
315 views

Why is the gas giant grand tour interval 175 years when the synodic period of Uranus and Neptune is 171 years?

The "Grand Tour" path Voyager 2 took, flying past Jupiter-Saturn-Uranus-Neptune, repeats every 175 years. As the original paper by Gary Flandro puts it: Earth – Jupiter – Saturn – Uranus – ...
SE - stop firing the good guys's user avatar
11 votes
2 answers
671 views

Why does the Sagan-Drake pulsar map have a circle (negative/blank) near the center?

(click to enlarge, source: WikiMedia) If you look carefully near the center, each of the pulsar line segments have a gap at a specific radius. I can't find any mention of the meaning of this. Any ...
BenJ's user avatar
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1 answer
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Are there any accurate velocity plots of all spacecraft that achieved escape velocity from the solar system? (Pioneers, Voyagers, & New Horizons)

The answer to this question provides a seemingly accurate plot of the velocity of Voyager 2 over distance along with the heliocentric escape velocity. Are there similar graphs for the other 4 ...
user177107's user avatar
7 votes
2 answers
3k views

How can I view the Voyager golden record images?

As a human, I'm mildly interested in seeing for myself what message we have sent to some hypothetical aliens. This NASA page displays 48 of them: https://voyager.jpl.nasa.gov/galleries/images-on-the-...
SE - stop firing the good guys's user avatar
29 votes
4 answers
5k views

Could one of the interstellar probes discover Planet IX by accident?

Could one or some of the spacecraft sent beyond the Kuiper belt discover (or even disprove) the hypothetical Planet IX? That doesn't necessarily mean coming so close you'd recognize the planet in ...
Giovanni's user avatar
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17 votes
2 answers
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Why was the imaging quality of the Voyager probes *much* better than the Pioneer probes despite being launched only 5 years later?

Pioneer 10 and 11 launched in 1972 and 1973, respectively, whereas both Voyager probes launched in 1977. I do expect the imaging quality to improve in 5 years but the difference is a bit too much. ...
user267545's user avatar
2 votes
3 answers
4k views

Why haven’t we landed probes on Neptune, Jupiter, Saturn and Mercury with onboard cameras?

Why haven’t we landed probes on Neptune, Jupiter, Saturn and Mercury with onboard cameras? Voyager 1 and Voyager 2 were sent out in the 70’s, with 70’s technology, is there technology available that ...
Kamaal's user avatar
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1 vote
1 answer
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Why is the highest speed that Voyager 2 achieved from the Jupiter gravity assist not at perijove?

I plotted some data of the speed of Voyager 2 for various times (around the Jupiter flyby) and noticed that the highest speed that Voyager achieved was not at perijove and was wondering why this might ...
Alexander Ivanov's user avatar
2 votes
0 answers
104 views

Where can I find the specific details of a gravity assist space mission?

0 I am writing a research essay where I need to know the specific details of a gravity assist mission such as Voyager 2's flyby of Jupiter for example (but any mission would work as long as it is a ...
Alexander Ivanov's user avatar
19 votes
2 answers
3k views

Where will the Pioneer, Voyager and New Horizons spacecraft be after one galactic orbit?

After the Pioneer, Voyager and New Horizons spacecraft complete one orbit of the Milky Way (in approx. 230-250 million years or one "galactic year"), how close will they then be to our solar system? (...
Charlie's user avatar
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11 votes
2 answers
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Which wears out faster on RTGs; the R's or the TG's? (the radioisotopes or the thermocouples)

Below this answer to Are there any safe-to-launch alternatives to RTG's for outer solar system exploration? I saw the comment: ...the Voyager RTG cores are still putting out plenty of heat. The ...
uhoh's user avatar
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