Questions tagged [jupiter]

Questions regarding Jupiter, the 5th and largest planet in the Solar System.

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4answers
6k views

How to calculate conjunctions of 2 planets

So, the recent conjunction of Jupiter and Venus seems to have spawned lots of excitement over this "rare" event. But what I can't figure out, is exactly how rare it is. And I've seen such conflicting ...
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0answers
61 views

Question about telescope eyepieces

I have a Celestron 60LCM refractor telescope. It has a 60mm aperture and a 700mm focal length. It came with two eyepieces. One is 25mm and the other is 9mm. They are marked only with their focal ...
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1answer
122 views

Counter clockwise rotation of storms at Jupiter's north pole. What explanations have been proposed?

On Earth, high pressures and low pressures occur interchangeably. So that where two pressure systems intersect, they move the air in the same direction. But as Juno revealed the first observations of ...
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The electron–cyclotron maser emissions from Earth

The first-ever detection of radio signals caused by the electron–cyclotron maser mechanism outside of the Solar System, on Tau Bootis b was recently published (here). This phenomenon causes huge radio ...
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2answers
253 views

Will I be able to see both Jupiter and Saturn at the same time in my Astromaster 114?

I have a Celestron Astromaster 114 Newtonian reflector telescope. The specs: aperture: 114mm focal length: 1000mm focal ratio: f/8.77 I also have a t-ring so I can connect a Nikon camera to it. Will ...
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1answer
1k views

Are the Jupiter-Saturn conjunctions and winter solstice related?

There is conjunction of Jupiter and Saturn on Dec 21. And there is another celestial event on that day the winter solstice. So I'm just wondering that are these two events are related or not?
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1answer
139 views

Lightning in Jupiter's "string of pearls?"

Is there any reason there couldn't be lightning in the storms that make up Jupiter's "string of pearls?" Addendum:I'm writing a science fiction novel, with a ship passing by Jupiter and ...
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2answers
98 views

Why do Jupiter impact events look dark brown?

When a large asteroid impacts a rocky planet, the impact area becomes molten, looking red. However, when an asteroid or other large object impacts a gas giant, like Jupiter, the impact area turns dark ...
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1answer
137 views

Does Jupiter rotate at the same speed at every depth?

Jupiter rotates in less than 10 hours. Its rotation is differential, with the upper layers of the atmosphere spinning a bit faster at the equator than at higher latitudes. Do the inner layers of ...
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2answers
73 views

Why does the Simbad page "A.A. Michelson's Jovian Galilean-satellite interferometer" show data for Betelgeuse?

When searching for things related to How did Michelson measure the diameters of jupiter's moons using optical interferometry? I came across the ui.adsabs.harvard.edu entry A. A. Michelson's Jovian ...
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1answer
124 views

Why Trojans haven't merged into moons

Jupiter's trojans are located in the L4 and L5 Lagrange points. These two points are stable, so why don't all the trojans have already merged into small moons? And since it's not the case, what ...
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2answers
686 views

Why is every year the same number of days despite the gravity in the solar system?

I was just watching a Geoff Marcy talk on YouTube showing how they infer the presence of planets transiting distant stars. The supposed periodicity wasn't always quite regular from what I could see, ...
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0answers
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Celestron 130 EQ astromaster [duplicate]

I brought this 130 EQ telescope and set it up following the manual. I checked collimations and seemed alright, the usual 3 clips with the black solid circle in the middle crisscrossed by the spider ...
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3answers
168 views

Do great spot like features favour appear in south hemisphere?

As we know, both Jupiter and Neptune have great spot like features in South hemisphere, and Saturn has dragon storm in south hemisphere, is it true that great spot like features appear in South ...
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1answer
2k views

What is behind the Great Red Spot's longevity?

On Earth, storms can last a few days. The Great Red Spot on Jupiter is a storm that has been going on for more than 400 years now. What is different on Jupiter that makes it possible for storms to ...
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0answers
44 views

What can Jupiter's spectrograph tell us other than its rotational velocity?

I have data of a Jupiter's image and the spectra of each pixel in the image, and I am playing around to see what I can do with it. I have managed to find Jupiter's rotational velocity by finding the ...
4
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1answer
151 views

Can you see both Jupiter and Saturn (and their moons) in detail during their upcoming conjunction?

In December of this year, Jupiter and Saturn are going to be in a conjunction. Are they going to be close enough that you could resolve both as more than just dots and see their respective satellites ...
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2answers
873 views

What is the period of Jupiter being visible in the sky?

For more than 3 months now, we can enjoy seeing Jupiter in the sky, and this will be the case until end of December. This means that Jupiter move slowly in the sky every day, but it makes me wonder ...
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1answer
197 views

Can Jupiter's nightside be classified as spectral type Y?

As far as I am aware, the latest spectral types that have been assigned are around Y2, for objects like WISE 0855-0714 that have temperatures around 250 K or so. I've also seen several directly-imaged ...
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1answer
94 views

Surface of the Sun, or Jupiter, etc [duplicate]

I keep hearing and reading statements that refer to the "surface of the Sun" (how hot the surface of the sun is) or the "surface of Jupiter" (when the Shoemaker comets hit Jupiter)....
7
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1answer
243 views

Lucky imaging with Celestron 14 - is this result reasonable?

I attempted to do some lucky imaging of Jupiter using a permanent installation (Celestron $14$" SCT + Paramount ME II) and Nikon D5600 attached directly to a Baader Hyperion 8-24mm eyepiece (...
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2answers
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Jupiter with a mobile phone and Celestron Astro FI 102mm Maksutov

My name is John, I am new here and now that I am retired I decided to get myself my first ever telescope, why I never got one before I have no idea...probably too busy. So I thought I would try and ...
3
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1answer
81 views

How far can we detect lightning in radioastronomy?

The wikipedia article on whistlers has this information: Voyager 1 and 2 spacecraft detected whistler-like activity in the vicinity of Jupiter known as "Jovian Whistlers", implying the ...
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1answer
192 views

Will Jupiter eventually stop shrinking?

Jupiter is currently shrinking due to the Kelvin-Helmholtz mechanism. Will this mechanism eventually hold or getting slower? If so, at what size of Jupiter will it stop and why? If not, what will ...
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2answers
633 views

A smudge near Jupiter

I was looking at the Jupiter for the first time today and I have noticed a smudge near it. Could someone explain what it is, please? I was looking online but did not find anything. So I thought that ...
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3answers
646 views

Adiabatic versus convection

I am reading about the interior temperature structure of Jupiter. It says in various texts that there are regions in Jupiter's atmosphere which are well-approximated by a dry adiabatic lapse rate. ...
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3answers
4k views

Why don't the inner moons of Jupiter have tidally-induced volcanism?

Volcanism on Io is caused by the fact that it is tidally heated. There are four moons that are closer to Jupiter than Io with higher eccentricities, yet they don't seem to have any volcanism at their ...
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39 views

Focal ratio importance for planetary viewing

It seems that almost every article online regarding planetary viewing recommends a telescope with a high focal ratio (f/8 or more), for revealing the finer details of the planets. But I find this a ...
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1answer
169 views

Is Jupiter as opaque as it looks?

Although it is impossible to tell what is and isn't false color (aside from the adage that it probably is false). It's inarguable that no picture of a gas giant shows any depth or significant ...
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2answers
505 views

Computing orbit positions of Jovian Satellites / Moons using JPL data

I've been trying to build a model of the solar system in a game. Thus far I've succeeded in placing each of the planets in position using Keplerian elements and formulae from https://ssd.jpl.nasa.gov/...
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1answer
2k views

Why do gas giants have clearly delineated surfaces, whereas the Earth's atmosphere fades into space?

I've just seen this Forbes article. Why do gas giants appear to have clearly delineated surfaces, whereas the Earth's atmosphere fades into space? Is it just a matter of scale? Or is there some ...
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1answer
168 views

Why isn't there a large gap in the number of captured moons Jupiter and Saturn have?

Given that Jupiter is roughly 3x as massive compared to Saturn and is located right next to the asteroid belt, it feels that Jupiter should easily have a larger amount of captured moons. However ...
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650 views

What would Jupiter look like from a Galilean moon?

If I were on a Galilean moon of Jupiter, like Europa or Ganymede, what would the planet look like? (Let's say I'm on a space station that provides atmosphere to make it slightly less unrealistic.) ...
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1answer
228 views

Why does Saturn have a more prominent equatorial bulge and higher flattening ratio than Jupiter despite rotating slower?

It is my understanding that a planet's equatorial bulge is caused by the centrifugal force produced by its rotation, and the faster a planet rotates the bigger the bulge and flattening ratio of a ...
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2answers
10k views

Is Jupiter a failed star?

The elemental make-up of Jupiter is about entirely hydrogen and helium, along with a very small fraction of the atmosphere being made up of compounds such as ammonia, sulfur, methane, and water vapor. ...
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1answer
940 views

How frequently do Jupiter & Regulus have triple conjunctions?

I am wanting to know if the triple conjunction of Jupiter with Regulus in: Sep 10, 3 BC Feb 7, 3 BC & May 8, 2 BC with Jupiter later having a conjunction with Venus in Jun 17, 2 BC has happened ...
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1answer
908 views

Is it possible to see Callisto with the naked eye when it's at its greatest elongation from Jupiter?

A quick search shows that Callisto has an apparent magntidue of 5.65, which would make it easily visible under relatively dark skies. Being the farthest Galilean moon, does it ever get far away from ...
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2answers
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During solar eclipses on Jupiter, can the moon(s)' shadow(s) on the surface be seen from Earth with a telescope?

All of the Galilean moons are large and close enough to Jupiter that they can completely eclipse the sun and allow a solar eclipse to happen. My question is can an observer from Earth, see the moon(s)...
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0answers
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Would magnetic reversals on Ganymede affect radiation levels at the surface?

Currently the intrinsic magnetic field of Ganymede is anti-aligned with respect to the Jovian magnetic field. If this situation changed to become aligned, either due to magnetic reversals of the ...
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3answers
2k views

How often are there lunar eclipses on Jupiter

For the Earth-Moon system, the orbit of the Moon is at a slight incline compared to the plane of the ecliptic. This incline is enough for there to be eclipses roughly twice a year rather than every ...
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1answer
3k views

Size and mass of comet ATLAS (C/2019 Y4)

I read some news about this new comet and some unreliable sources said it is twice as big as Jupiter. I tried to find a reliable estimation of its size or mass, but I couldn't find anything. Would you ...
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1answer
190 views

How much rock has Jupiter "swallowed"?

During its formation approximately 4.5 bya, Jupiter passed through what is now the asteroid belt,gravitationally deflecting some spacewards and some sunwards. Logically, Jupiter, due to its massive ...
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1answer
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Why isn't the asteroid belt affected by Jupiter's gravitational field?

Jupiter's mass is just about a 1000th of the sun's and the asteroid belt is slightly closer to Jupiter than it is to the sun. If the heavier the object, the more curvy space is around it, why isn't ...
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1answer
133 views

If Jupiter would stop rotating, would its atmosphere become homogeneous and single coloured?

Looking at pictures of Jupiter, there are many different colours and patterns. I imagine that the rotation has much to do with this, since there are horizontal "bands" across the planet along the ...
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1answer
176 views

Total rotational angular momentum estimates for Jupiter?

I wrote a quickie answer where I estimate the total rotational angular momentum of Jupiter as about 7E+38 kg m^2/s. However it bothers me because one of the sources gets this number assuming uniform ...
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1answer
58 views

How long do solar eclipses last on Metis?

How long does Jupiter obscure the sun, from the perspective of Metis, the innermost moon of Jupiter? In other words, how long does Metis remain in the shadow of Jupiter? If it varies by time of year,...
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1answer
185 views

Storm on Earth vs. storm on Jupiter?

Why is the storm on Jupiter much stronger than storms on Earth and why don't the storms on Earth get as big as Jupiter's great red spot
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Is there any possibility that a gas planet turns into a star [duplicate]

Since the sun is made of one of elements hydrogen Why Saturn and jupiter doesnt turn into a star since they have a elements of hydrogen ?
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2answers
134 views

If Jupiter were to absorb all other planets in the solar system, would it reach degeneracy pressure?

Jupiter's mass is about the maximum a planet can be before it starts to fuse hydrogen in its core and undergo a massive transformation. Total mass of all solar system objects in question is: here. ...
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40 views

What is the radial dependence of the density of Jupiter or Saturn?

Can anyone point me to the reference where I can find the density of Jupiter or Saturn as a function of the distance from its center?