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Questions tagged [jupiter]

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

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3 votes
0 answers
42 views

Grand Tack Hypothesis and Nice model

The two models describe the evolution of the solar system at different timescales, but both result in the current location of Jupiter. Are they compatible with eachother? Could the Grand Tack be the ...
0 votes
1 answer
2k views

Maximum and minimum masses and sizes of giant planets?

What are the minimum & maximum masses and diameters of giant planets? Minimum end of the scale Earth has mass of 1 Earth mass and a mean radius of 6,371.0 kilometers, and thus a mean diameter of ...
2 votes
0 answers
56 views

Would Jupiters magnetosphere and radiation belts protect an atmosphere on a Jovian moon in the heaviest radiation environment, or erode it?

Assuming the Jovian moons had atmospheres early in their life, would Jupiters magnetosphere help protect those atmospheres from erosion by solar radiation, or would the radiation in the magnetosphere ...
4 votes
2 answers
211 views

Are there areas within Jupiter's magnetosphere without powerful radiation?

I know Jupiter has powerful radiation belts, but I'm wondering if there are places within the magnetosphere that are relatively calm. I'm asking about Jupiter (a gas giant we know) because I'm curious ...
10 votes
2 answers
386 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 ...
-4 votes
1 answer
115 views

What would happen if a huge planet like Jupiter or Saturn was (or could be) terraformed? [closed]

Even if these planets could be terraformed, it is very unlikely for this to be done in the future, if planets like Mars or Venus were terraformed. What would happen if Jupiter or Saturn could be ...
13 votes
1 answer
1k 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 ...
16 votes
2 answers
3k views

Why was Jupiter so bright; is it the "phase"?

When I was walking in the evening (2023-12-30) in the south of Germany (roughly 49°N 12°E) I noticed a single bright object in the sky, and (not being an astronomer) I wondered what it might be. So I ...
4 votes
1 answer
122 views

Could the magnetic field of Earth protect life from Jovian radiation if it was a moon of Jupiter?

While the genesis of this question derives from a hypothetical scenario, the question itself (whether Earth's magnetic field is strong enough to withstand Jupiter-strong radiation) isn't, so I hope ...
1 vote
0 answers
92 views

Why Saturn has more Moons than Jupiter? [duplicate]

Why does Saturn have more moons than Jupiter, I know the grand tack hypothesis suggests Jupiter migrated from 3.5 au to present orbit but given that Jupitern is more massive meaning a larger ...
2 votes
0 answers
100 views

What are the orbital periods Jupiter, Saturn and earth?

What are the highest accuracy (and hence precision) orbital periods of Jupiter, Saturn and earth in units of days. Note have Allen’s Astronomical Quant(Cox1991)/ Wolfram-α / Wikipedia / 3ea. don’t ...
1 vote
1 answer
123 views

Identify the bright object to the left of the moon

I'm seeing the sky at 23:00 on September 29, 2023, from the east of Algeria's point of view. To the left of the moon, there is something very bright. I need to confirm if it's Jupiter? (My camera ...
22 votes
6 answers
10k views

How big would the asteroid belt planet be?

As I understand it, the asteroid belt exists because the gravitational force of Jupiter prevents the asteroids from accreting (is that a word?) into a planet. If, however, Jupiter didn't exist and ...
-4 votes
2 answers
207 views

What is Jupiter's apparent magnitude as watched from Uranus?

Saturn's apparent magnitude from Uranus is +3.228. Jupiter orbits closer to the sun than Saturn. Can we therefore expect Jupiter’s apparent magnitude from Uranus to be dimmer than Saturn's, or is it ...
3 votes
2 answers
112 views

Could a super Jovian planet have mild radiation belts?

Will a large gas giant always have powerful radiation belts or could a milder radiation environment exist even around super Jovian planets? I know Jupiter’s radiation belts are so strong due to a ...
3 votes
1 answer
524 views

Why do planets just look like a dark ball in my telescope

I bought a Matsukov Cassegrain many years ago and now wanted to dust it off and use it. I had two young kids at the time so couldn't really find the time. Last night Jupiter and Saturn were both ...
7 votes
2 answers
791 views

When will the next series of mutual eclipses of Jupiter's moons begin?

When I was young (I won't tell you when) I saw one of the four Galilean moons of Jupiter suddenly disappear while watching through a small refractor. It wasn't a coincidence, I'd seen the prediction ...
8 votes
1 answer
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 ...
9 votes
4 answers
5k views

Planets looks like normal stars when I see them using telescope

I've been trying to see planets using my 114 mm (aperture) f=900 mm telescope. For the moon, I got very good quality pictures, but when I try to see planets they just appear to be as if I'm looking at ...
1 vote
2 answers
313 views

"What was that spot in the sky?" - How to identify satellites

Yesterday, May 22nd 2017, I removed the telescope from its dusty box1 and decided to watch Jupiter. After about 2 minutes of observation I spotted something across the sky [X-files music in background]...
3 votes
1 answer
104 views

How accurate is the Sudarsky Scale today?

How accurate is the Sudarsky scale of gas-giant classification today? Do the different classes still exist, and look roughly the same?
3 votes
2 answers
276 views

Are these Jupiter's moons?

Sorry for the huge picture), anyway, as you can see, there are 2 specks of light on either side of the upper planet which is likely Jupiter as the lower one is clearly Saturn-shaped. I was going ...
2 votes
2 answers
341 views

At what point above Jupiter is the gravity Earth-like?

Jupiter is a massive planet. We get it. However, we have also heard that, since it has such a huge radius, at different elevations it is possible to experience different levels of gravity. We hear ...
23 votes
3 answers
5k views

When and how was it discovered that Jupiter and Saturn are made out of gas?

Was it due to appearance only or spectroscopic methods were used? Venus also has a thick cloud cover, how was it determined to be a rocky planet?
11 votes
4 answers
5k views

Can magnetism escape a black hole?

I know light, and practically nothing but gravity can escape a black hole. My question is: can magnetism escape a black hole? A couple things that convince me it can are: Jupiter's magnetic field ...
4 votes
4 answers
5k 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.) ...
2 votes
2 answers
219 views

Effects of other planets on life on Earth

I've heard this often in the media, that the gas planet Jupiter has a significant effect upon life on Earth - by, the say, drawing asteroids & comets to itself, many planet-killer are destroyed as ...
5 votes
2 answers
141 views

How to read Babylonians' tablet that were used to track Jupiter's movements?

There is a science news article on how Babylonians used geometry to track Jupiter’s movements. Here is an image of cuneiform tablet which shows Jupiter's movements. (source: sciencenews.org) From a ...
3 votes
1 answer
223 views

How dark are eclipses of Jupiter's moon by the planet?

On Earth, an eclipse of the Sun (by the Moon) can get pretty dark, but not as that dark as a regular night. Usually it would look like civil twilight at maximum darkness. This is primarily because of ...
5 votes
1 answer
140 views

What are these bumps on Europa?

The surface of Europa is famous for all the criss-cross lines thought to be cracks in the ice above a water ocean that somehow re-freeze. But in the photo below I also see a lot of raised "bumps&...
20 votes
5 answers
33k views

What would the effects be on Earth if Jupiter was turned into a star?

In Clarke's book 2010, the monolith and its brethren turned Jupiter into the small star nicknamed Lucifer. Ignoring the reality that we won't have any magical ...
2 votes
0 answers
63 views

Boise ID 6:55pm 2 lights in a row brighter than Jupiter -disappeared [duplicate]

Ok there is another question like this from a month ago. I am in Boise Idaho, and at 6:55 PM MST Nov 15, 2022, two lights brighter than Jupiter were about an inch to the north and east. The two ...
4 votes
2 answers
214 views

How Well Can I See the Surface of Jupiter Using Natgeo 76/700 EQ Telescope?

I have been trying to see surface features on the disk of Jupiter with my Natgeo 76/700 EQ1 but it does not appear to be too clear. So I was wondering: What kind of image I should expect from this ...
2 votes
0 answers
69 views

Why did Jupiter spiral into the inner solar system? [duplicate]

We know over 4 billion years ago, Jupiter was created and started to head into the inner solar system until Saturn pulled Jupiter back out. In fact, we wouldn’t be here if Jupiter stayed inside the ...
8 votes
1 answer
1k views

How does the Sun orbit the Sun-Jupiter Barycenter?

I got the Orbital Elements of Jupiter around the Sun, which describe how it orbits relative to the "fix" Sun. Jupiter Semi Major Axis (AU): 5.20336301 Eccentricity: 0.04839266 Inclination to ...
5 votes
2 answers
556 views

What is the infrared self-luminosity value of Jupiter and Saturn?

I'm looking for these data to apply them to the Kelvin-Helmholtz mechanism but I can't find the values. Or at least if there is an order of magnitude compared to the solar luminosity.
-3 votes
1 answer
445 views

What were the two bright dots that showed up near Jupiter and vanished after seconds? [closed]

I saw two bright lights near Jupiter and I’m pretty sure that it wasn’t just an airplane. It had almost the same level of brightness as Jupiter, and I was wondering what it could be. Can anyone ...
2 votes
1 answer
224 views

Could we use the future dead core of the sun with Jupiter to create another sun?

5 billion years from now the sun would be dead and the solar system would be in darkness. :( But what if in 5 billion years humans would be advanced enough to move the dead iron(EDIT: I meant carbon) ...
1 vote
0 answers
137 views

What is the brightness and size of Jupiter from the Galilean moons, the closest moon, and the farthest moon?

From the Moon, Earth would appear 4 times larger than the Moon seen from Earth, and the magnitude of a "full earth" is around -17. However, Jupiter from the Galilean moons appear much larger ...
10 votes
1 answer
219 views

What causes the halo in JWST's new image of Jupiter?

Then new JWST image of Jupiter shows a small halo on the right side of the planet. What's causing this feature? I figure it could be that the planet is simply overexposed (or moving slightly during ...
3 votes
1 answer
167 views

Could a super-Jupiter exoplanet in the habitable zone have an axial tilt?

I’m wondering if a massive planet (maybe 10 times the mass of Jupiter) in the habitable zone of a G type star could have an axial tilt similar to earth or if gravitational forces would erode the tilt ...
7 votes
1 answer
1k views

Why does Callisto only have eclipses every 3 years?

I don’t understand why Jupiter only eclipses Callisto in three year periods separated by three years. I get that the reason Callisto doesn’t always have eclipses is because of the combo of Jupiter’s ...
5 votes
0 answers
69 views

What are the typical emissions of Jupiter's Aurorae?

I'm looking for some solid measurements of the full range of emissions from the Aurorae on Jupiter. I've found partial sets of data in the past which are most easily summarized here. As you can see, ...
2 votes
0 answers
77 views

If Ganymede had a thick, Earth-like atmosphere, would the surface be protected from Jupiter's intense radiation?

Obviously, this is a totally hypothetical, alternate version of Ganymede, since it would also need to have more mass and a stronger intrinsic magnetic field to hold onto a substantial atmosphere. But ...
18 votes
4 answers
7k views

If Jupiter is a gas-giant then why don't its features change?

A naive question. When we look at Jupiter, we see that its features didn't change largely over many years, for instance, the red-spot. If it is composed of gases and liquids, then why aren't the ...
34 votes
1 answer
6k views

Why do Jupiter’s moons have so much water?

Why do Jupiter’s moons have so much water by mass? Did all the bodies in the solar system start out with this much water and the planets closer to the Sun simply lost it to space?
7 votes
5 answers
3k views

Are we sure solar cycle is not related to the orbit of Jupiter?

Are we still debating the relationship between Jupiter and solar cycle? If not, what is the common or mainstream opinion about this topic? Or in other words, have we disproved the solar cycle is ...
0 votes
1 answer
84 views

Where can I get a step by step guide to use CASA for obtaining a radio image of a planet like say Jupiter?

I intend to use CASA for processing ALMA data for Jupiter and obtain a proper radio image for Jupiter. However, is there any specific step by step guide for the same just as is the following for TW ...
10 votes
3 answers
3k views

What are the black spots/blobs in JWST Jupiter's images?

Consider these two recent JWST images of Jupiter: Europa is shown as the black circle. In the second image, Europa's shadow can be seen near Jupiter's big red spot (white in the image, since it is in ...
2 votes
1 answer
59 views

How and where can I get the continuum and/or FITS data for Jupiter and Saturn from ALMA, GMRT and VLA Telescopes?

I intend to process and analyze the radio images and emissions from Jupiter and Saturn. I wish to get data from ALMA, GMRT and VLA Telescopes. Requesting you to please guide me as to how do I access ...

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