Jupiter Definition and 160 Threads

Is there a limit to the smallness for a larger mass to eject? Can a planet eject a grain in orbit, or even a lone atom in orbit?

Even an offhanded remark by some character in a sci-fi story can have major implications. With my story based on a generation ship in the late 25th century, I considered it self-evident that humanity would already have explored most of the planets and moons within the solar system before trying...

https://www.imperial.ac.uk/news/244571/imperial-led-jupiter-bound-instrument-successfully-deployed/ https://www.esa.int/Science_Exploration/Space_Science/Juice https://www.esa.int/Science_Exploration/Space_Science/Juice/How_to_follow_the_Juice_launch_live...

https://phys.org/news/2023-03-massive-giant-exoplanet-tess.html It is one of the most massive and densest exoplanets. For comparison, Mo has a density of 10.22 g/cm3 and Ta has a density of 16.6 g/cm3. I would suspect that some of the density is derived from the high compressive pressure of...

Does Ceres ever transit Jupiter? And if it does, how large of a telescope would I need to see it?

This is much like the "grain of sand" at near speed of light hiting Earth, but now targeting Jupiter with a needle! What if... Any way, which is the correct way to analyze this kind of scenarios? For example, I think than being the speed of the needle near c, is nonsense to think about the...

Last night, on Wednesday, November 9, the KPF team successfully captured a first light spectrum of Jupiter with the next-generation instrument This spectrometer picture of Jupiter has just been taken by the Keck, but I don't understand it. Wiki says Jupter is "89%±2.0% hydrogen" and "10%±2.0%...

In case you didn't see it elsewhere:

Ocean physics explain cyclones on Jupiter https://phys.org/news/2022-01-ocean-physics-cyclones-jupiter.html Moist convection drives an upscale energy transfer at Jovian high latitudes https://www.nature.com/articles/s41567-021-01458-y...

I know that in Earth, an astronaut feels weightless in orbit but actually is not. The astronaut would not feel his own weight until he actually stands on a floor where his feet point towards the Earth as the Normal Force is the perception of weight. So, in Jupiter, where g ~ 25, an astronaut...

Hello PF, I am teaching a general education college-level introduction to "Planet Earth" class that covers a bit of astronomy. This question is in regards to our unit on the formation of the Solar System. Specifically I am confused about the composition of Jupiter and Saturn. This is a figure...

Been noticing this for a few evenings; didn't know it was Jupiter until this evening using https://stellarium-web.org/ (image from this evening). Has been distinctly flashy more than other objects with a slight red flash at the top and a blue flash close to the bottom. Last night I looked with...

Hi! I'm fascinated by the apparent "concentration" of the four large Galilean moons in a barely 1.5 million km "strip", and the vast, "empty" distance to the next moons (moonlets?) Out of a purely aesthetic sense of horror vacui, :wink: I've always wondered if there was at least another Jovian...

I just watched this beautiful video about resonance frequencies and saw a pattern (the pattern at 1:25) , that reminded me of the pole storms on jupiter: Image Credit: NASA/JPL-Caltech/SwRI/ASI/INAF/JIRA Could it be that some resonance frequencies on the pole of Jupiter are the reason why...

Jupiter has large cold satellites, which could be Earthlike. Earth emits more energy than from the Sun from radioactive elements still decaying in the Earth's core. Jupiter also generates energy, perhaps low level thermonuclear activity. Jupiter has a magnetic field like the Sun does...

https://phys.org/news/2020-11-december-jupiter-saturn-planet-middle.html I do not know if we have enough hobby astronomers here, but the above calls for a photo competition. But in any case, don't miss the opportunity if you're a stargazer!

I'm sure I've read somewhere that Jupiter has 99% of the solar system's angular momentum, which shouldn't be the case. However, I can't find a source for this, and any search online for the topic doesn't bring up any science sites. Did I mis-remember?

Just quick question: Could you put space stations (or even other small planets) at any aribitrary orbit or any radius in between Jupiter and Mars? Or, if something attempted to do so, would the orbit be unstable, and the object drift to either Mars or Jupiter? I was reading about Lagrange...

I read (in "The View From The Center") that Jupiter protects the Earth from collision with large space rocks, asteroids, etc. What I can't get out of my mind is that could it also cause collisions. A large rock (initially not heading for Earth) could be put on a different path by Jupiter's...

In a recent Scientific American article, Tammy Ma claims Jupiters core is solid diamond. She claims her work with lasers has demonstrated this. Any thoughts?

Yup, they all appear together pre-dawn on March 18 to the SE. The planets hang out together for a week or so, while the Moon moves on. https://www.news4jax.com/weather/2020/03/16/you-are-missing-planet-palooza-if-you-dont-look-up-the-next-few-days/

Objects fall on Earth at 9.8 m/sec² independent of mass. If gravity is independent of mass why does Jupiter pull an object more than the Earth does? Is that inconsistency within the law or in my perception?

https://www.space.com/nasa-juno-dodges-death-jupiter-polar-storm.html Includes a video.

Pardon the very naive question, but why does the atmosphere in these gas giants seem to have, from a distance, a very clear, sharp and distinctive boundary? When one looks at Earth's atmosphere from space, it seems to have a fuzzy bluish boundary, gracefully vanishing into the black. I read...

If Jupiter is made of gas, how can it maintain its spherical shape without being contained in a spherical shaped container?

Does my wrist watch slows down on planet Jupiter? I know Jupiter's gravity is greater than Earth's gravity.

im confused about this thing, because they said Earth's acceleration due to gravity is independent from the mass of the thing dropped

Romer measured speed of light using moon's of Jupiter but he got value with a error of 26%. Is anyone did same experiment in modern era? And what value they got?

Why wouldn't a brown dwarf grow in radius if it started to gain mass?

By Kenneth Chang July 18, 2018 On Tuesday, scientists led by Scott S. Sheppard of the Carnegie Institution for Science announced the discovery of a dozen moons around Jupiter, bringing the total number orbiting the solar system’s largest planet to 79. Next to the famous moons that Galileo...

I ask because I feel a mission to Europa as something much more interesting than landing on Mars because of its obvious potential astrobiological implications. And I suspect that drilling through Europa's ice is never going to happen just by sending some sort of robotic drilling rig alone and...

This article suggests that exoplanets are the same size and have equal orbital spacing ,so what is different from our solar system. https://www.sciencedaily.com/releases/2018/01/180109141918.htm An international research team led by Université de Montréal astrophysicist Lauren Weiss has...

Homework Statement I have the following variables: f = .93 m f(e) (eyepiece) = .0082 m distance toJupiter pj = 588 E^9 diameter of Jupiter dj = 139822 E^3 Find the height of the image of Jupiter created by the objective lens of a telescope. Homework Equations M = -q/p q = f Where M is the...

First let me make clear that I am not a student in Physics. I have a BA in Anthropology and a BS in Computer Science. My only background in Astronomy and Astrophysics is as a fan. The sort that has watched lots of Discovery Channel-likeTV shows over the years. I'm now 61. The reason that I...

Ever since the first Pioneer spacecraft sent back closeup photos of Jupiter's Great Red Spot ("GRS") back in 1978(?), I noticed the GRS looks like a wave-cloud. There is a thick lip of wave-cloud on one side of the GRS, caused by air sweeping over an enormous volcano, it then bends around on...

I read the Jupiter is so big that it doesn't really orbit the sun. Is that true?

Homework Statement This question involves parts of other questions, so I will state the relevant parts and essentially what the question is asking. It is from Kibble Classical Mechanics, Chapter 4, Question 22. If more information is needed I will provide. We have a satellite that orbits the...

Hi, I would be interested in the position and the "appearing" of Jupiters red spot over many decades. Here the first question is: What would be the best coordinate system? Jupiters axis of rotation is very stable. So the latitude would be very interesting in my eyes. But: How do we define the...

With the upcoming rendezvous of the Juno spacecraft and Jupiter I would like to begin this thread as a place for discussion on the variety of topics this mission is sure to produce. The instrument payload and orbital profile should produce a great amount of Data that will rewrite a lot of what...

Homework Statement One of Jupiters Moons runs on a circle with the radius r1= 420000km in T1=1,77d. How big is Jupiters Mass? Can you calculate the Mass of the Moon with this as well? γ = 6,672*10-11m3*kg-1*s-2 (gravitational constant) Homework Equations I used following equation...

Two amateur astrophotographers in Europe separately photographed what appears to have been an asteroid impacting Jupiter, at least one using a low-intermediate level telescope: http://www.foxnews.com/science/2016/03/29/did-asteroid-slam-into-jupiter.html?intcmp=hphz06 Confirmation pending...

Hello everyone, I have a question about nuclear fusion. The simplest form of nuclear fusion is the fusion of 4 hydrogen atoms into 1 helium atom. Jupiter has a mass close to 1.9 * 1027 kg and around 90% of its mass consists out of hydrogen -> 0.9 * 1.9 * 10 27 = 1.71 * 1027 kg. I know that it...

Homework Statement Hi! I need help with a problem regarding the corotational speed en energies for oxygen ions around Jupiter. I'm stuck Homework Equations See below The Attempt at a Solution I know that the maximum magnetospheric plasma density is about 1000-50000 cm^-3. I also know that...

Homework Statement THe sun has a mass of 1.99x10*30 kg. Jupiter has a mass of 1.90x10*27 kg and a mean radius of orbit around the sun of 7.78x10*8 km what is the speed that Jupiter travels in its orbit around the sun? Homework Equations fg=(Gm1m2)/d*2 fc=(4pie*2mr)/T*2 The Attempt at a...

I would think that precession of the equinoxes occurs only if the planet is at least partially rigid. Since Jupiter is gas and liquid, it would not experience precession of the equinoxes. Is this right?

I watched a program that said that some of Earth's past climate change was due to variations in Earth's orbit and precession due to the the gravitational perturbations caused by Venus and Jupiter. Why would that be so? I know that the orbits of the planets are eliiptical generally and they...

Homework Statement Io and Europa are two of Jupiter's moons. Io orbits Jupiter at a distance of 421,000 km in a time of 1.769 days. Europa orbits Jupiter at a distance of 671,000 km in a time of 3.551 days. Compute an average mass for Jupiter. Homework Equations a=v^2/r...

1 Jupiter year is 11.86 Earth years. The rate of change of the Earth-Sun-Jupiter angle is the difference between Earth and Jupiters angular speeds: ##\frac{1}{365}\big(1-\frac{1}{11.86}\big)\frac{\text{revolutions}}{\text{day}}## The time between the closest and farthest distances between...

When we see an official description of Pluto's "diameter" it is given without the atmosphere. The official diameters of the gas giants seem to include many layers of gaseous atmosphere. Is this difference merely a convention? Or is there a good reason for treating e.g. Pluto differently than...