Questions tagged [jupiter]

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

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Space travel to Jupiter and Gravity Assist slingshot [closed]

I'm writing a Sci fi script in the vein of Solaris/2001 Space Odyssey and have a particular question around how a ship near Jupiter that's very close to being out of fuel could use the remainder of ...
3 votes
1 answer
61 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
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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
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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
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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
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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
196 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
92 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
287 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
749 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
4k 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 ...
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Visibility of solar flaring region from Jupiter

I numerically calculated the following numbers. The geocentric longitude of the Sun on 25 November 1999 at 00:00 UT was 243.52 degrees (numerically calculated with an error of 1 degree). On this date (...
1 vote
2 answers
299 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
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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
264 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
210 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
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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
3k 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
195 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 ...
4 votes
2 answers
135 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
175 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
137 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
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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
61 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
175 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
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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
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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
503 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
409 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
188 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
122 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
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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
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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
68 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
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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
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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 ...
2 votes
1 answer
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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 ...
0 votes
1 answer
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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
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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
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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 ...
2 votes
1 answer
92 views

Will Jupiter's days speed up?

Jupiter has so many moons, and those moons have a gravitational pull on it. Does that mean, that over time, the length of Jupiter's days will get shorter?
2 votes
1 answer
145 views

If Earth was a moon of Jupiter orbiting at the same distance as Metis (Jupiter's innermost moon), then how much lighter would a 100 kg person feel?

Metis is Jupiter's innermost moon, orbiting at a semi-major axis of 128,000 km. If Earth were to magically replace Metis, then how much lighter would a human weighing 100 kg be? There's no need to ...
7 votes
2 answers
707 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/...
18 votes
3 answers
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What is this 877-year cycle in the orbits of Jupiter & Saturn, and this multimillion-year cycle in the lunar orbit?

The book The Theory That Would Not Die (by Sharon Bertsch McGrayne, 2011) states the following on page 28: He [Pierre-Simon Laplace] used other methods between 1785 and 1788 to determine that Jupiter ...
4 votes
1 answer
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The orbital period of Jupiter and Europa billions of years later

We know that the Sun gets so big billions of years later and the Earth will get destroyed. What will the orbital period of Jupiter (Sun-Jupiter system) and its moon Europa (Jupiter-Europa system) be ...

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