Questions tagged [jupiter]

Questions about the exploration of the planet Jupiter.

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What will be the effect if we stand on Jupiter?

As we all know Jupiter is a gaseous gas giant and it has a large mass, almost twice the sum of all other planets in the Solar system. So, if it happens that we go to Jupiter, and, as we know it does ...
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44 votes
3 answers
9k views

Did the Galileo spacecraft cause a "blotch" on Jupiter after it crashed?

There's this interesting story: Did NASA Accidentally “Nuke” Jupiter? Long story short: On September 21, 2003 Galileo is deorbited in order to prevent eventuality of contamination of Europa. It ...
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33 votes
1 answer
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Why does this image of Jupiter look so strange?

The Universe Today's Yes, This is Actually the Shadow of Io Passing Across the Surface of Jupiter shows several images of Jupiter taken by JunoCam. Why does this image look so strange? Instead of an ...
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32 votes
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Why is Jupiter called a "Gas Giant"?

Jupiter's enormous gravity would turn its atmosphere first into a liquid from a certain depth, and then into a solid further towards its centre. So Jupiter has a solid core, above which is a liquid ...
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24 votes
1 answer
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Can I harvest diamonds from the rain of Saturn and Jupiter?

A recent news article on BBC News indicates that 1,000 tonnes of diamonds a year are being created on Saturn This is like science fact that screams it must be Science Fiction! Assuming the ...
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21 votes
2 answers
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Why will JUICE take 8 years to reach Jupiter, longer than any earlier spacecraft?

Galileo took six years from Earth to Jupiter. Cassini-Huygens took three years to reach Jupiter and six years to reach Saturn. New Horizons took one year to reach Jupiter. Juno was launched in 2011 ...
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20 votes
3 answers
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Why are we interested in visiting the giant planets' icy moons?

I have noticed lately that future missions by NASA and ESA are targeted towards the moons of Jupiter and Saturn. They mention that they might be a possibility of life; the icy moons they are focusing ...
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20 votes
5 answers
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How long does it take for a signal to travel between Earth, and Juno at Jupiter?

How long would it take for Juno's communication to reach the Earth? In other words: what is the time delay between perception by Juno and perception by NASA researchers?
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20 votes
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If colonists burrowed far enough under the ice on Ganymede or Europa, would the ice provide adequate protection for them from Jupiter's radiation?

This is a hypothetical question I'm asking as a SF writer, and the time setting would be approximately 2,250 AD.
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18 votes
1 answer
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Why does NASA's Juno spacecraft only have a one year primary mission?

For many years, Juno has been touted as NASA's "low cost" mission to the Jovian system. As a New Frontiers mission, it is cost capped at only $1 billion. From its launch in August 2011 to ...
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17 votes
2 answers
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How much longer would New Horizons take to reach Pluto without the Jupiter slingshot?

A recent answer by PearsonArtPhoto claims: New Horizons was launched at Solar System Escape Velocity, meaning it could have visited anywhere beyond Earth without stopping. It did visit Jupiter, ...
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If Saturn or Jupiter were in Earth's orbit, would any of their moons be habitable for humans?

The majority of exoplanets found so far are comparable in size to Jupiter or Saturn. Which, as we know, are problematic for human habitation. But their moons have a lot of potential. Some of these ...
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16 votes
1 answer
870 views

Resilience to data transmission errors of the Juno spacecraft

What techniques have been employed for the Juno spacecraft to successfully transmit data packets back to Earth once she's in a polar orbit around Jupiter? Jupiter is a strong source of radio ...
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16 votes
1 answer
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Will Juno record its deorbit?

I'm really interested about the Juno mission launched in 2011. The spacecraft will reach Jupiter on July 4, 2016, in couple days from when I write this question. It will orbit Jupiter 37 times ...
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16 votes
1 answer
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When are there launch windows to Neptune via Jupiter?

I suppose there's a launch window to Neptune by using Jupiter as often as there are Jupiter/Neptune conjunctions, every 13½ years. But which years are Jupiter and Neptune best aligned for gravity ...
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14 votes
3 answers
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Would a Europa lander need radiation shielding similar to Juno?

Jupiter has a very intense radiation field, and thus spacecraft going to study it need heavy radiation shielding, such as Juno's radiation vault. This protects the delicate instruments and ...
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14 votes
1 answer
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How is JunoCam different from a normal CCD camera?

JunoCam has tweeted us! More background from the BBC. It is supposed to have several features that help allow it to work in the high radiation and magnetic fields it will experience during each ...
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14 votes
2 answers
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How will Juno establish existence of solid core within Jupiter and determine its size?

One of the set goals for NASA's New Frontiers Juno mission is studying Jupiter's interior and determining if this gas giant has a solid core and if, how large it is. This is mentioned several times on ...
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14 votes
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Could Jupiter's tidal forces be used to generate energy?

Let's say we have a colony on Europa (or any other Jovian moon really). Jupiter exerts a lot of tidal forces on its satellites. Could this force be used to generate energy for our colonists?
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13 votes
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How unreachable are Jupiter's moons from Mars with the technology developed for going to Mars?

Jupiter's moons in their closest point to Mars (when Jupiter is closest to the sun) are like 7 times the distance between Earth and Mars, and in a return journey they will farther away. Is there any ...
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Are any electrically propelled missions to the outer solar system being planned? If not why not?

In answering this question I discover that a probe capable of $10^{-4}$ G continuous acceleration can get to Europa (starting from LEO) in about 16 months. Assuming I haven't made a mistake in my ...
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13 votes
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What are the implications if Juno finds that Jupiter has a solid core?

Juno has arrived at Jupiter, and will begin taking measurements to determine if the gas giant has a solid core. But what I cannot seem to find is the implications such a discovery would have. This ...
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12 votes
3 answers
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What would happen if an Earth-sized body encountered Jupiter?

As we all know Jupiter is a gaseous planet so what would happen if an Earth-sized object happened to encounter Jupiter? Would Jupiter engulf the object and make it stay at Jupiter's core? Would the ...
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12 votes
1 answer
2k views

What are these features on this moon of Jupiter?

My Google background (supplied by "NASA Image Library") has a picture of Jupiter, along with one of its moons (Ganymede? Io?) in the foreground. What are these two features, that look like a ...
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12 votes
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What is the typical power redundancy built into a spacecraft?

NASA's Juno page says The Juno spacecraft launched aboard an Atlas V-551 rocket from Cape Canaveral, Fla., on Aug. 5, 2011, and will reach Jupiter in July 2016. The spacecraft will orbit Jupiter 32 ...
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11 votes
2 answers
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Will JUNO be able to return any photographs?

Looking at the scientific instruments of JUNO, there doesn't appear to be a camera. Furthermore, no mention is made of any photos being returned in the scientific objectives. Will anything resembling ...
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11 votes
1 answer
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How long did New Horizons take to upload all of its data from the Jupiter encounter?

It's a pretty well known fact among the regulars of this site that New Horizons will take up to 18 months to completely upload the data from the Pluto encounter. When it was at Jupiter, it was much ...
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11 votes
1 answer
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What causes the cracks on Europa to form?

Europa, moon of Jupiter, has a number of large cracks, as seen below. The cracks appear to be associated with a brownish color, while the base surface appears to be a whitish color. What is the cause ...
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11 votes
2 answers
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Have there been any official feasability studies into descending balloons into outer planetary atmospheres?

The Vega program included a balloon floating in the Venus atmosphere. It seems no more balloons have been used on other planets since then. The Wikipedia article on Aerobots mentions JPL feasibility ...
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10 votes
6 answers
707 views

How was Juno's arrival set up to be on the evening of July 4th?

Presumable it is largely a coincidence that Juno arrives at the perfect moment for American pride in NASA's achievements, but not entirely. The video below of the trajectory, released in July 2011 ...
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10 votes
2 answers
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Why are Jupiter's trojans even remotely stable?

The spacecraft Lucy is en route to explore Jupiter's trojan asteroids. Lucy is so named because the trojan asteroids are believed to be fossil remnants from the formation of the solar sytem. ...
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10 votes
2 answers
489 views

Which side of Europa is which?

I understand that Europa is tidally locked* to Jupiter, so there's a Jovianmost longitude on one side and an anti-Jovian longitude on the other. What I can't figure out is which side is which. ...
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10 votes
1 answer
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Does NASA use Newtonian model of gravity for plotting the course of Juno or general relativity?

With the huge mass of Jupiter and its fast, approximately 10 hours daily rotation, there may be substantial twisting of space-time around it. A distortion of such magnitude that may call for ...
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10 votes
1 answer
546 views

What exactly is the interaction that blocked Juno's data downlink near solar conjunction?

According to Space.com's article Juno Phones Home: Jupiter Probe Reconnects with Earth After 8th Flyby, Juno's recent close flyby of Jupiter and data collection happened while Jupiter was too close to ...
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9 votes
1 answer
669 views

Why did Pioneer 11 use a gravitational assist to swing above the ecliptic plane... twice?

This answer to What do the shaded vertical lines in the animation of Gravity assists of space probes, mean? shows that the Pioneer 11 trajectory brought it close to both Jupiter and Saturn, and at ...
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9 votes
1 answer
476 views

A Jupiter-sized star?

TRAPPIST-1 is described as "Jupiter-sized" (comparable radius), although at 8% of the Sun's mass, must be on the order of 100x greater (Jupiter : Sun is about 1 : 1000). This seems paradoxical and ...
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9 votes
1 answer
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Is the far side of the tidally locked Europa moon safe from Jupiter's radiation?

From Wikipedia's Europa (moon); Orbit and rotation: Europa orbits Jupiter in just over three and a half days, with an orbital radius of about 670,900 km....and is tidally locked to Jupiter, with ...
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8 votes
3 answers
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Did the spacecrafts Galileo or Juno use the Galilean moons for a gravity assist before entering Jovian orbit?

Galileo and Juno are the only two spacecraft to have entered orbit around Jupiter. Did either of them use one of the Galilean moons for a gravity brake before in order to enter a stable orbit around ...
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8 votes
3 answers
251 views

When can we (public) expect to see the first optical images of Jupiter from the Juno spacecraft?

As many of us know, Juno spacecraft achieved orbit of Jupiter yesterday (July 4, 2016). Does anyone have an educated guess on approximately when we might see the first optical images from Juno in ...
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8 votes
1 answer
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How did Voyager 1 avoid crashing into Jupiter?

Consider the following video (taken from here): To me it looks like Voyager 1 will crash into Jupiter. Obviously Voyager 1 didn't crash into Jupiter, but at a glance it looks like it will. What ...
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8 votes
1 answer
618 views

What were the circumstances of this impact event on Jupiter in 2012?

I recently came across this video of an impact on Jupiter in 2012: http://youtu.be/5-msU-YVb9E Curious about its origin, I did some research and found that the video was taken at 11:35 UTC on ...
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8 votes
1 answer
274 views

What is the difference in resolution between the cameras in Voyager and Juno?

Both Voyager I and the Juno spacecraft photographed Jupiter (among other things). What is the difference in camera resolution between the two spacecraft? Did we receive larger photos from Juno?
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8 votes
1 answer
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Why does Jupiter have the colors it does?

This was sparked by an interesting conversation in the chatroom. We were discussing how Jupiter, being made of gas, has a lot of color. Looking into it, I found this statement, from Universe Today: ...
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8 votes
2 answers
668 views

Are there any gas giant probes planned that will return images or video?

The Galileo Probe did not include any imaging equipment to return images or video as it descended into Jupiter's atmosphere. Are there missions underway or planned that will include visual data ...
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8 votes
1 answer
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How is gravitational time dilation experienced by spacecraft near Jupiter such as Juno

I understand (I think) that a vehicle on or near a planet with greater mass - such as the Juno probe entering Jupiter's orbit soon- will experience time slightly slower relative to us on Earth. ...
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8 votes
1 answer
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Does Juno use MPPT?

MPPT aka Maximum Power Point Tracking is an active mechanism to collect maximum power a PV cell may deliver. This is typically achieved by varying the resistive load connected to a cell. Juno will ...
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7 votes
2 answers
345 views

What are the gravitational assist effects on the inclination of a probe's trajectory, from passing by Jupiter at different latitudes?

A flyby probe at Jupiter gets its inclination, relative to the ecliptic, changed if it passes above or below Jupiter's equator. How sensitive is a trajectory to this effect? I imagine that there ...
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7 votes
1 answer
481 views

Will Dragonfly flyby Jupiter en route to Saturn?

The table on the "Exploration of Jupiter" Wikipedia page suggests Dragonfly will be the first mission to the outer planets that will not use a gravity assist from Jupiter. Is there a source confirming ...
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7 votes
2 answers
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Why does the Juno spacecraft flyby Earth on the way to Jupiter?

Hohmann transfer to Jupiter is about 2 years 8 months. Juno spends 5 years getting there, almost twice as long. I note that it takes Juno 2 years 8 months to get to Jupiter after the Earth flyby, does ...
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7 votes
2 answers
432 views

SpaceX ITS - going beyond Mars

Let's assume that Elon Musk's plan to go to Mars is a success and there are several spacecraft which regularly go to Mars and back. At this point, how feasible would it be to start exploring the rest ...
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