Questions tagged [jupiter]

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

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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 ...
Poseidon of Milos's user avatar
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 ...
U. Windl's user avatar
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4 votes
1 answer
84 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 ...
user177107's user avatar
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1 vote
0 answers
91 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 ...
Arjun's user avatar
  • 1,256
2 votes
0 answers
92 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 ...
Joe Horwath's user avatar
1 vote
1 answer
116 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 ...
Mr Saw's user avatar
  • 13
3 votes
2 answers
101 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 ...
Elhammo's user avatar
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3 votes
1 answer
395 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 ...
Francesca Bahr's user avatar
0 votes
0 answers
63 views

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 (...
Smarty's user avatar
  • 61
3 votes
1 answer
95 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?
Kazon's user avatar
  • 587
2 votes
2 answers
262 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 ...
user98816's user avatar
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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?
Astrodhan's user avatar
  • 341
2 votes
2 answers
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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 ...
Agent Smith's user avatar
5 votes
1 answer
138 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&...
uhoh's user avatar
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2 votes
0 answers
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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 ...
Sid Mitchell's user avatar
4 votes
2 answers
197 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 ...
Rudra Singh's user avatar
2 votes
0 answers
68 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 ...
Prince Pugs's user avatar
5 votes
2 answers
522 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.
User13122015's user avatar
-3 votes
1 answer
430 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 ...
Muhammed Safvan's user avatar
2 votes
1 answer
205 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) ...
Dimitri Morvaine's user avatar
3 votes
1 answer
192 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 ...
InfinitySwordofDiamond's user avatar
1 vote
0 answers
126 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 ...
InfinitySwordofDiamond's user avatar
3 votes
1 answer
166 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 ...
Elhammo's user avatar
  • 1,087
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 ...
Elhammo's user avatar
  • 1,087
2 votes
0 answers
69 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 ...
Elhammo's user avatar
  • 1,087
10 votes
1 answer
215 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 ...
user2944352's user avatar
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?
Elhammo's user avatar
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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 ...
Victor Stafusa - BozoNaCadeia's user avatar
0 votes
1 answer
81 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 ...
Dhruv Nayak's user avatar
2 votes
1 answer
158 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 ...
Elhammo's user avatar
  • 1,087
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 ...
Kamal Aujla's user avatar
2 votes
1 answer
57 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 ...
Dhruv Nayak's user avatar
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?
bmp's user avatar
  • 23
3 votes
1 answer
186 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 ...
user177107's user avatar
  • 2,669
18 votes
3 answers
4k views

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 ...
r.e.s.'s user avatar
  • 323
4 votes
1 answer
163 views

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 ...
Snack Exchange's user avatar
2 votes
1 answer
104 views

Can you distinguish a transit from an eclipse when observing Galilean moons?

If I look at Jupiter through a small telescope (or binoculars) while Io is overlapping Jupiter, is it possible for me to visually distinguish a transit from an occultation? For example, maybe there's ...
prideout's user avatar
  • 203
1 vote
1 answer
244 views

Can I use 75mm Plano convex lens to build telescope [closed]

I want to see Jupiter with moon. So am planning to build telescope. Can I use 75mm Plano convex lens with 1000mm focal length?
Girish Wadkar's user avatar
6 votes
2 answers
464 views

Can Jupiter's rings be seen with the naked eye by an astronaut nearby? How difficult would it be?

Maybe a basic question, apologies. I understand that there would be different answers depending on how far is "nearby", depending on how inclined our orbit is, and what is our alignment with ...
we'll see's user avatar
  • 325
-4 votes
2 answers
200 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 ...
Constantthin's user avatar
0 votes
1 answer
96 views

The Kuiper Belt and Oort cloud [closed]

How come the comets and asteroids in the Kuiper belt and Oort cloud are kept in a gravitational field and they don't get pushed and pulled by the planets around them? I get why comets in the Oort ...
Anonymous RU's user avatar
1 vote
1 answer
168 views

Would a Jovian calendar be based on the Jovian sidereal year or tropical year? [closed]

According to many places online, Jupiter's tiny axial tilt makes it have no seasons, and its huge size eliminates any variance possible due to its orbital eccentricity. All these considered, what ...
איתי מרלוב's user avatar
0 votes
1 answer
136 views

How long is a mean Jovian tropical year in Jovian solar days?

Many sources say that Jupiter's year lasts 10,475.8 Jovian days. When I calculated to see if that's correct With the data NASA had published, I found out it's the measurement of a Jovian sidereal year....
איתי מרלוב's user avatar
12 votes
2 answers
3k views

Is Jupiter warming the Earth? (Earth, Sun Jupiter system)

If Sun-Jupiter baricentre is outside the Sun, does that mean the Sun is orbiting around that point too right? Then the Sun shouldn't be nearer to the Earth at some point during the Sun-Jupiter orbit (...
Enrique's user avatar
  • 267
1 vote
1 answer
54 views

If Jupiter's day length increased from the current 9 hours to 100 hours, would the weather become more or less violent?

Would average windspeeds increase or decrease if day length increased substantially on Jupiter? Is windspeed in Jupiter's atmosphere primarily driven by solar energy differentials between night and ...
Techneon's user avatar
2 votes
1 answer
120 views

Jupiter's asteroid-like moons and planetary-systems around sub-brown dwarfs

Is it likely that any of Jupiter's small moons were formed in orbit around Jupiter or are they all captured asteroids? I thought of this question because I wondered whether the planetary-system of a ...
sno's user avatar
  • 1,432
26 votes
3 answers
7k views

Is Jupiter's Red Spot "locked in place" or does it move around?

A person could be forgiven when looking at Jupiter's Red Spot storm for concluding that it doesn't move. That it's geologically locked in place. But is it? I know it's a stretch to use the phrase &...
JBH's user avatar
  • 552
0 votes
3 answers
865 views

How big can a planet get, with respect to its star for it to sustain life? [closed]

Earth is 108 times smaller than the sun in terms of its diameter while Jupiter is 10 times. Assuming Jupiter was located such that it could sustain life, theoretically how big a planet can get with ...
Abhay Bhai's user avatar
1 vote
1 answer
88 views

How much real time was compressed into this 10 second long timelapse Hubble video of Jupiter's aurora?

The HubbleESA video Timelapse of Jupiter’s auroras is discussed in the ESAHubble page Timelapse of Jupiter’s auroras and includes the identifier heic1613a. However ...
uhoh's user avatar
  • 31.3k
3 votes
2 answers
271 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 ...
Avid_Cloud's user avatar

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