Questions tagged [jupiter]

Questions about the exploration of the planet Jupiter.

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4
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1answer
214 views

Did Juno do a plane change circa October 2019? If so, by how much?

There are several reports in the news that the Juno spacecraft executed a very long propulsive maneuver so that it wouldn't pass through Jupiter's shadow. Apparently it would be in dark so long that ...
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186 views

Is a ballistic Jovian capture using the Galilean moons possible from interplanetary entry?

While spacecraft like Galileo and Juno did use gravity assist to supplement their insertion burns, as answered here, is it possible to enter Jupiter's orbit without a capture burn?
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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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1answer
66 views

Would it be possible to use a electrodynamic tether or similar device on or within Europa to generate electricity from Jupiter's magnetosphere?

I was reading about the idea of using an electrodynamic tether to generate electricity for satellites in Earth's orbit using the planet's magnetic field, generating electricity but gradually lowering ...
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Does Juno's UVS have any chance to spot Europa plumes?

JIRAM has recently been proven to be useful to monitor the volcanic activity on Io, from a considerable distance. Europa Clipper will have an ultraviolet spectrograph which be pretty much a copy of ...
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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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1answer
414 views

Is this the first photo of Jupiter's ring(s) from deep space?

The BBC news article Juno peers below Jupiter's clouds includes several very interesting images from the Juno spacecraft. The one below is a photo of Jupiter's faint ring. The article says: One very ...
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499 views

Juno's original orbit around Jupiter - is this apsidal precession? If so, need expression

Below is a plot of Juno's originally planned orbit around Jupiter, extracted from JPL Horizons. It's shown in J2000 ecliptic coordinates, centered on the Jupiter barycenter. It turns out the orbit is ...
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1answer
154 views

Why does Jupiter not appear flat at zero phase angle like the Lommel-Seeliger law says?

Jupiter appears to approximately follow Lambert's cosine law as it looks darker towards its limbs when viewed from the same direction as from where the Sun shines on it. Here an image from the article ...
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629 views

What would happen if an object larger than Jupiter hit Jupiter?

What would happen if a large non-gaseous body, equal to or greater than that of Jupiter hits with Jupiter? My assumption is the larger body (name it as A) will have a large gravity and a large mass ...
8
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361 views

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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277 views

Flyby puzzler; starting from Earth, how many times can you use Jupiter flybys in one century?

Is there any limit to how many times you can increase velocity by repeated sling shot manoeuvres? and its answers have got me thinking, and that's always dangerous. Suppose you have a durable RTG-...
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Is there believed to be sharp boundary between Jupiter's liquid and metallic hydrogen layers and is there much convection and flow between them?

If it's not known, is it reasonable to assume that some Jupiter-like exoplanets might have well separated liquid and metallic hydrogen layers given moderately different temperature and mass? Author: ...
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Did JUNO adjust it's orbit in order to fly over Clyde's spot again?

Phys.org's Juno returns to 'Clyde's Spot' on Jupiter says: The feature is informally named for amateur astronomer Clyde Foster of Centurion, South Africa, who discovered it in 2020 using his own 14-...
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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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Why is NASA proposing an EMEJ (MEGA) trajectory for Europa Clipper instead of EEJ?

A launch service request was recently put out for Europa Clipper to do a flyby of Mars on its way to Jupiter. How is that a better trajectory than an EEJ, similar to Juno? Launch Vehicle Performance: ...
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Why is it that harmful for astronauts and technology to get too far into Jupiter's magnetosphere? Shouldn't it rather be protective?

Jupiter's radiation belts make it impossible for astronauts to stay on Io, Europa and Ganymede over extended periods of time, as well as getting too close to Jupiter at all. I wonder how close would ...
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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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2answers
556 views

Where does Io's sulfur come from?

This answer on Movies.SE collects some fascinating facts about the sulfur-dominated surface and atmosphere of Jupiter's moon Io. But it made me wonder where all the sulfur comes from in the first ...
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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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What's the slot region of Jupiter's electron radiation belt?

This is the slot region of the earth: https://www.sciencedirect.com/science/article/abs/pii/S0273117799005141
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How close a crewed spacecraft could orbit Jupiter?

How close could a crewed spacecraft orbit Jupiter? I read that Juno was as close as 5,000 km from Jupiter's top clouds, but I'm wondering about a spacecraft with humans inside (provided it's protected ...
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238 views

Why is there no plan for a Venus orbiter by ESA or NASA?

A rather complete-looking Wikipedia List of solar system probes enumerates only a few proposed future missions to Venus: Reading popular science magazines suggests that it would make sense to go ...
6
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752 views

Can a planet or other large body be a superconductor?

From Wikipedia on superconductivity of metallic hydrogen: In 1968, Neil Ashcroft put forward that metallic hydrogen may be a superconductor, up to room temperature (~290 K), far higher than any ...
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Gravity assist from Jupiter if leaving Callisto?

If I spacecraft was leaving Callisto to return to Earth, would there by any situation where it would use a gravity assist from Jupiter to increase its velocity?
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Was the gravity assist at Jupiter the most dangerous part of the New Horizons mission?

In terms of success of the mission, was the Jupiter fly-by the time when problems with the flight path was most likely to happen? Was the odds of failure at that point ever studied? If so, what were ...
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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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1answer
180 views

Would a spacecraft landing on Io need a heat shield?

Io is Jupiter's only moon with a considerable atmosphere. Its atmosphere is extremely thin (up to 40 nbar) which obviously is too thin to use a parachute. However a spacecraft would maybe need a heat ...
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Obtaining Europa's samples from Callisto. Possible to identify them? Worthwhile?

A lot has been discussed about the possibility of panspermia between Earth and Mars, and how compact systems such as Trappist-1 can be more prone to that. Here on Earth, we have identified numerous ...
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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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1answer
217 views

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 ...
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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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Have gravitation multipoles of Jupiter and Saturn beyond J2 been measured or at least estimated? At least the zonal harmonics?

This excellent answer has me wondering if there are any measurements or estimates of gravitational multipole moments of Jupiter or Saturn beyond J2. Here is what I found for J2 (in unitless form) in ...
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1answer
267 views

What would happen if Jupiter became solid like Earth and condensed to the size of Earth? [closed]

I just want to know, hypothetically, what if Jupiter was solid and condensed to the size of Earth. What would it look like? Would it's characteristics (gravity, orbit, rotation, etc) stay the same, or ...
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1answer
699 views

What does it take to survive the radiation on the surface of Ganymede?

Out of the four Galilean moons of Jupiter, unfortunately only Callisto is at a safe distance from its parent planet that the radiation is low enough so one is able to colonize it. Io is totally ...
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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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564 views

Is Mercury's orbit still considered potentially unstable (in the very long term)?

The subsection Mercury–Jupiter 1:1 perihelion-precession resonance in the Wikipedia article Stability of the Solar System links to the article Solar system could go haywire before the Sun dies in the ...
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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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3answers
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Why didn't the Galileo spacecraft take an image in Jupiter's upper atmosphere?

When the Galileo probe was crashed into Jupiter it could have made an image from what is considered the "surface" (level of Earth-like atmospheric pressure) of Jupiter or the atmosphere more below or ...
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1answer
118 views

Could we use the atmospheres of planets like Mars or Jupiter to separate xenon from them to replenish the engines?

Could we use the atmospheres of planets like Mars or Jupiter to separate xenon from them to replenish the engines? I mean, touch the atmosphere of Mars and separate Argon and Xenon for ionic engines, ...
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1answer
102 views

Would a space rocket launching from Ceres in a path to Jupiter be faster relatively to the sun than one launching from Earth?

Suppose you have a space rocket which when launching from Earth its speed relatively to Earth it's 11 km/s. For what I've read in another topic in Space SE, the orbital velocity of the planet where a ...
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1answer
128 views

Can mineralogy maps be made without dedicated instruments? MAGIC at Callisto

While we are still waiting for the official Discovery finalists announcement, and it's perhaps a bit premature to be discussing the proposals, I've been thinking about the exciting MAGIC mission to ...
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How does the dynamics of the Jupiter and Saturn system make them be well suited for low-energy transfer?

Many papers mention that the compact and complex dynamics of the Jupiter and Saturn systems makes them ideal low energy transfer. My question is how? How does the dynamics of the Jupiter and Saturn ...
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Could electrodynamic tethers power long-term unmanned satellites around the Sun, Jupiter, or Saturn?

Assuming you have the budget to research electrodynamic tether powered unmanned satellites, and you had a cheap way of getting them in to earth low earth orbit, would they be able to use electricity ...
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1answer
506 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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1answer
331 views

How exactly did Jupiter change Ulysses orbital plane from nearly ecliptic to polar?

Ulysses spacecraft trajectory is truly amazing. Utilizing gravity assist from Jupiter it was sent into polar orbit around the Sun. I can understand gravity assist concept, I can also (intuitively) ...
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1answer
568 views

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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1answer
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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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How far can a piece of spacecraft go, where the signal still reaches planet Earth?

Right now, we don't know the distance of which the spacecraft can go but at the moment, we can go to Jupiter, but the signal takes a long time to reach back to planet Earth.
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How does not orbiting Europa maximize Clippers coverage of Europa for a given radiation dose?

According to the BBC's Nasa confirms ocean moon mission: Europa's orbital path takes it deep into belts of intense radiation that surround the giant planet. This radiation fries spacecraft ...