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Questions tagged [pioneer]

The Pioneer program was a series of United States unmanned planetary exploration missions from 1958 to 1978.

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Why is Voyager/Pioneer so slow compared to Parker Solar Probe?

Deep space probes should be the fastest ones, due to incredible distances they are supposed to travel. AFAIK, Parker Solar (PS) will reach more than 600 000 km/h, incredible. On the other hand, ...
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Why didn't the Pioneer probes maintain communications with Earth as long as the Voyagers have?

The Pioneer Missions. March 26, 2007 PIONEER 10 SPACECRAFT SENDS LAST SIGNAL - After more than 30 years, it appears the venerable Pioneer 10 spacecraft has sent its last signal to Earth. ...
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Unknown Moons and Planetary Flybys

I’ve a question for any trajectory experts out there: The Pioneer and Voyager probes discovered new moons during their flybys of our four giant planets (and indeed rings). These didn’t come as much ...
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Can we talk to Pioneer 6?

My question is relatively simple in the essence that it takes few words to ask, but scientifically may be a nightmare. In 2000, the Goldstone Deep Space Communications Complex sent a message to ...
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Pioneer spacecraft anomaly [duplicate]

Has the possibility of the "Pioneer Anomaly" as caused by currently inadequate conceptual models of gravity been put to rest by explaining it as caused by on board thermal radiation ? What is the ...
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Did New Horizons also demonstrate the “Pioneer Anomaly”?

In this short but very helpful answer @MikeH provides a link to this short item published in Nature:"...and farewell to the Pioneer Anomaly" which is well worth reading! It references a Physical ...
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How are precision trajectory measurements made of trans-Neptunian spacecraft?

This question asks if Voyager suddenly encountered unexpected gravity from an unseen object, how would it be detected, and there are several answers. For the farthest probes - those now farther from ...
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Why has the Earth's motion carried it out of view of Pioneer 11's antenna?

According to The Pioneer Missions, my emphasis, The Pioneer 11 Mission ended on 30 September 1995, when the last transmission from the spacecraft was received. There have been no communications ...
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Why was radio contact with Pioneer lost earlier than with Voyager?

Why was radio contact lost with the Pioneer probes much earlier than with the Voyager probes? The Voyagers were launched only 4 years after the Pioneers, yet the Voyagers are projected to last into ...
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Why didn't Pioneer 11 visit Uranus/Neptune, and why didn't Voyager 1 visit Pluto?

The following image from NASA shows the flight paths of Pioneer 10, Pioneer 11, Voyager 1, and Voyager 2, as well as the positions of the outer planets. It seems to me that with a little tweaking of ...
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Any evidence for a KBO fly by from one of the Voyagers or Pioneers?

Pioneer 10 was about 80 AU when contact was lost in 2003 and both Voyager 1 and 2 traveled more than 100 AU and they are still operating. This put those 3 probes for years in the range of Kuiper belt ...
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What significance did Pioneer 10 & 11 have?

The images taken by Pioneer 10 and 11 were of much lower quality than those of later planetary probes. I wonder if this is representative also for their other instruments. For example, they don't seem ...
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Delta-v of deep space maneuvers in deep space missions like Voyager or Pioneer

What are typical delta-v for deep space maneuvers, used by deep space missions to outer planets or for "interstellar missions" ? For example, Voyager 1 now has 17 km/s speed relative to the Sun. What ...
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Is there any way to communicate with Pioneer 11 through Voyager 1 or 2?

The position of Pioneer 11 is between Voyager 1 and 2, that means Pioneer 11 is closer to Voyager 1 and 2 than to Earth. According to the Wikipedia article on Pioneer 11 we lost communication with it ...
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Could radiated heat propel space-craft in outer space?

The comment chain on What is the feasibility of launching a probe to Sedna? indicates RTG thermocouples decay. With the passage of time the thermocouple may even have the ability to transduce an ...
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Is there any way to find and track Pioneer 10, 11, and Voyager 1, 2?

The space probes Pioneer 10, Pioneer 11, Voyager 1, and Voyager 2 are the first man-made devices to have escaped from our solar system. The main problem they face is the lack of power source in them. ...
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Where are the upper stages for the Voyager/Pioneer stages?

I was reading this question, and was trying to remember an article I read many years ago. It seemed the article was indicating that there is a chance that one of the boosters from one of these ...
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Where are Pioneer 10, 11 and the Voyagers ultimately headed?

Pioneer 10, Pioneer 11, and the two Voyagers are all headed out of the solar system. Has anybody extrapolated where they will all end up (if at all)? Is there a graphic that depicts the direction of ...