Questions tagged [jupiter]

A gas giant and the fifth planet from the Sun and the largest in the Solar System.

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Can Jupiter turn into a star if it radiated off enough heat?

Since a star heats up when it radiates more heat (via gravitational compression), and since that's also how protostars turn into stars, I was wondering what are the chances of Jupiter reaching the ...
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Why does Jupiter have so many moons?

The usual explanations one finds just say that Jupiter has a strong gravitational field, thereby being able to catch moons easier, and then they stop there. But this seems far from a satisfactory ...
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How close can Jupiter be to Earth without making Earth unhabitable? [closed]

How close can Jupiter be to Earth without making Earth unhabitable? What's the closest distance possible? Can Jupiter be twice or three or four times as close to Earth as Mars without having any ...
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What is the maximum flux of 1 GeV stably-trapped protons in Jupiter radiation belts?

And in which L-shell? This graph shows a flux of around 50 stably-trapped protons per m2 per sec on Earth, and I have read it's higher in Jupiter but I can't find the value. A source would be ...
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What is the precise internal structure of Jupiter?

I've been trying to find out exactly where the layers of molecular hydrogen, and metallic hydrogen are precisely, inside Jupiter, in kilometres from the centre. Ideally with an error margin of 1-10kms....
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Would an extremely slowly forming star ignite?

Nuclear fusion requires extremely high temperatures and pressures, both of which are crated by the collapse of protostars. But, what if the accretion of matter happened slowly enough that the core ...
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How do I determine the exact distance from Jupiter to the Sun on a specific date?

I've recently needed to determine exactly how far Jupiter was from the Sun on April 25th 2018, when a Hubble image of Jupiter was taken. I'm a beginner in physics and Google searches lead me nowhere. ...
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1 vote
1 answer
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Is the radiation on IO's surface directional?

I know that magnetospheres redirect solar radiation into the poles of a planet, but since IO is in Jupiter's magnetosphere does that mean that solar radiation is redirected across the planets surface ...
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What determines the magnitude of the atmospheric scale height of a planet?

What determines the magnitude of the atmospheric scale height of a planet? https://en.wikipedia.org/wiki/Scale_height says that: "Approximate atmospheric scale heights for selected Solar System ...
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4 votes
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How does Jupiter have two magnetic South poles and one magnetic North pole? Magnetic tripole?

Generation of magnetic field of Earth is relatively well-understood The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and ...
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Is Jupiter really protecting us from collisions with objects?

Many documentaries I see on the Solar System or the planets or the threat of collisions with meteorites talk about how lucky we are to have Jupiter, with its immense gravity attracting asteroids to it ...
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How much energy from the Sun could we get if we use Jupiter as a gravitational or atmospheric lens?

How much energy (watts) from sunlight could arrive to the focal point if we use Jupiter as a gravitational lens? and if we use it as an atmospheric lens by using refraction? How far the focal point ...
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2 votes
1 answer
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Jupiter-sized planet orbiting a white dwarf?

I read this news about a Jupiter sized planet orbiting a white dwarf. It is still puzzling to the scientists that how it remained as a single piece. NOTE: I went through the Astro.SE link given in ...
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How strong are the tides raised by Io on Jupiter relative to the ones raised by the Moon on Earth?

There seems to be 2 ways of calculating tidal forces that are contradictory. Either: By calculating the difference of Io's gravitational acceleration on a point on Jupiter's near side and the ...
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-1 votes
1 answer
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What will be the absolute gravity of Io moon if Jupiter's gravity not in effect? Can GR explain it?

It is noted that the distance between Io moon to Jupiter planet and our Moon to Earth is nearly same. However, the ratio of gravity Earth/Moon is 80.4 times vs ratio of gravity Jupiter/Io is 20276.7. ...
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New orbit of Jupiter after the death of the Sun

When our sun finally ceases to exist as a red giant, 7 billion years from now, the outer layer of the star will get blown off in huge clouds of gas and dust known as planetary nebulae, leaving behind ...
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1 vote
1 answer
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Why is Jupiter's ring system so faint?

Planetary ring systems are formed when asteroids, comets, or any other large objects pass too close to the planet and are torn apart by the planet's gravity [1]. Jupiter is often called the "punching ...
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Why does the shadow of Io on Jupiter look so big?

It has been reported this week[0] that the following image by Kevin Gill is the shadow of Io crossing Jupiter. Why is the shadow so large? My intuition is that Io is much smaller than Jupiter so ...
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Question on Jupiter's Core

A paper published by UC Berkley in 2010 (article about it here: https://www.sciencemag.org/news/2011/12/jupiter-eating-its-own-heart) tested what happens when magnesium oxide (one of the constituents ...
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On the Rømer experiments and the speed of light

In 1676, Rømer determined that the speed of light must be finite. His experiment consisted on observing the eclipses of Io, one of Jupiter's moons, by Jupiter itself. He timed these eclipses over a ...
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3 votes
1 answer
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What are estimated magnetic properties of liquid metallic hydrogen?

I understand that liquid metallic hydrogen isn't easy to produce, or keep it stable on Earth, but can be liquid metallic hydrogen magnetised? Does it have magnetic properties at all?
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Jupiter & Saturn

In his prog. on Jupiter, Brian Cox stated that the complex gravitational interplay, between Jupiter & Saturn, prevented Jupiter from drifting through the Asteroid Belt, and approaching our part of ...
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How much does time-dilation effect our observance of the most massive objects in our solar system?

Disclaimer: I'm kind of a newb, so I apologize if this question is not well formed. Please comment if anything is unclear, and I will do my best to make corrections. Reading this post about time ...
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Is metallic hydrogen an example of exciton?

I know that in exciton an electron is excited and goes from valence band to conducting band leaving an electron hole which is positively charged, soon Jupiter came into my mind and then this question. ...
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Show me how the sky is like in Jupiter (but not mars)

Assuming someone is "standing" on the "surface" of Jupiter (ok, in a stable position deep inside the gas giant's gravity field analog to standing on the surface of a rock planet) where the moons can ...
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Planetary Gravitational Pull

I have read that Jupiter and Saturn apparently have no surface. I have a hard time believing that a ball of gas can have such a strong gravitational pull without any kind of a solid surface. Can ...
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2 answers
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What happens if Jupiter is ignited?

I was wondering, what would happen if there was a large amount of oxygen released into Jupiter's atmosphere, than igniting it? Because Jupiter is 90% gas, therefore being a big fire waiting to happen (...
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3 votes
1 answer
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Why is Jupiter gaseous rather than solid or liquid?

Why is Jupiter made up of gas? If the gravitational pull was strong enough would it compress to form a solid body?
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44 votes
4 answers
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What would happen if Jupiter collided with the Sun?

This question is inspired by a similar one asked on Quora. Let's say a wizard magicked Jupiter into the Sun, with or without high velocity. What happens? The Quora question has two completely opposed ...
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Actual Jupiter seen from the place, will it looks like on the pictures?

Jupiter picture processed by one of citizen scientists Picture above is artificially proceeded by one of the citizen scientists working for NASA. It was composed from monochromatic pictures taken by ...
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Jupiter: Why is there no atmosphere at distance?

Gravitational constant: 6e-11 (meters, seconds, and kg). Jupiter radius: ~ 69,000,000 meters (google) Jupiter mass: $2*10^{27}$. 1 kg, at Jupiter's radius, experiences ~100N of force: $$ F = G *...
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Jupiter's formation

Two days ago i went to a mathematics conference where there was a paper presented on Jupiter's formation via disk-instability model. I know that there are two different theories for the formation ...
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Is there a distinct size limit between planet and star?

This question was inspired by: This recent article about an exoplanet "10 times the size of Jupiter" Prof. David Taylor's website about the "Life and Death of Stars" (in particular, the first page's ...
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Gravity on the surface of Io

Something about this seems a little incorrect to me but I can't quite put my finger on it. The moon closest to Jupiter is Io, with a diameter of $3650$ km and a mass of $8.93 \times 10^{22}$ kg, and ...
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Could a planet with a strong magnetic field exert a diamagnetic force on an orbiting moon?

Here is a question from the world building stack exchange. https://worldbuilding.stackexchange.com/questions/79003/making-a-slow-orbit-around-a-large-gas-giant Requested: a means to have a moon of ...
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6 votes
1 answer
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Let's make Jupiter a star

It is known that Jupiter is mostly made of hydrogen, but that it is not massive enough to start nuclear fusion. In other words, Jupiter is not a star, but could be a star if someone added hydrogen to ...
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2 votes
2 answers
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How many arcseconds the light of a star unfolds in the vicinity of jupiter?

One of the main demonstrations made to test the theory of relativity were the images of the solar eclipse of May 26, 1919, (causing a shift in the positions observed in celestial coordinates of its ...
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2 votes
0 answers
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How much more mass would Jupiter have to accrete to start fusion? [duplicate]

How long would it take? Is it likely in the life of our sun?
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10 votes
1 answer
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Have we measured the rate at which Jupiter is shrinking?

On most websites that I looked at, it says Jupiter is shrinking 2cm/year (for example wikipedia and Quora). However neither of these website say whether this rate is measurable (the latter says it is ...
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1 vote
1 answer
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Effect of gravity on inhabitants floating in the Jupiter atmosphere

In several science fiction mythologies, humans live in artificial habitats in the Jovian atmosphere (Piers Anthony's "Bio of a Space Tyrant" and Ian M Banks "the Algebraist" for example). Assuming a ...
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5 votes
1 answer
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Shoemaker-Levy 9 impact on Jupiter

When the comet Shoemaker-Levy 9 impacted with Jupiter it created a ball of fire 3000 Km high and it left a mark on the surface of the planet that was visible for weeks (source: Wikipedia). How was the ...
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1 answer
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How can the orbit of Jupiter's moons be used to calculate the speed of light? [duplicate]

How can the orbit of Jupiter's moons be used to calculate the speed of light? It seems this was one of the first methods and goes back to 1656.
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How we are able to see Jupiter?

As everybody knows Jupiter is made up of gases and these gases mainly contain hydrogen and helium. Since light passes through gases and does not reflect when shining on them, how we are able to see ...
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1 vote
4 answers
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If planet like Jupiter is massive enough to hold hydrogen with its gravity is it bound to become a star?

I have been reading about Jupiter as of late and reason I am asking is if Jupiter has strong enough gravity to pull hydrogen to itself then it should be only matter of time when it will acquire enough ...
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0 votes
1 answer
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Light speed measured by observing Jupiter moons [duplicate]

The famous discovery that the light has speed measures the times of the immersion and emergence of Io, one of Jupiter's moons. However, I still can't comprehend this. Even when the Earth is further ...
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How can a gas giant be about the same size but six times more massive than Jupiter?

I've just read this article: http://www.sci-news.com/astronomy/science-kepler-432b-new-super-jupiter-exoplanet-02490.html And I wondered how this could be possible? Maybe it's because this gas giant ...
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26 votes
3 answers
4k views

Why do the storms of Jupiter have long life unlike that of Earth?

Recently I saw How the Universe Works. In one of the episodes, concerning Jupiter, they told that the storms on Jupiter can survive many, many, times longer than those on Earth. What is the reason ...
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2 votes
1 answer
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Questions regarding the feasibility of "Jupiter"-like fusion reactor

I was reading this post from this website: Turning Jupiter into a star It basically talks about whether fusion can or does happen in the core of Jupiter. I know Jupiter cannot become a star, but I ...
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23 votes
4 answers
6k views

How did they take photos of Jupiter?

How did they take photos of Jupiter - I mean Jupiter is illuminated and that's a lot of light to produce. Am I missing something, and there was some sort of dark photo technology used, or was there ...
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1 answer
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Would atmosphere of Jupiter blow up if I launched a atomic bomb there? [duplicate]

This is based upon an question I had, since in Jupiter there is no oxygen a simple fire cannot be started let alone even happen due to its temperature. Anyway that being said, If I somehow used a ...
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