Jupiter Definition and 160 Threads

Must a "Hot Jupiter" be relatively young? A large proportion of exoplanets so far discovered are "hot Jupiters," large gas giants orbiting very close (< 0.1 AU) to their primaries. It seems to me that a gas giant orbiting at such a close distance ought to experience significant friction as...

I am having the hardest time figuring out the angular distance between Jupiter and Io, Europa, Ganymede and Callisto! I asked my teacher for help: "How would one find the angular distances between Jupiter and its moons?" and he said: "Do you know the field of view of your telescope? Once...

1. The problem: The moon Europa, of the planet Jupiter, has an orbital period of 3.55 days and an average distance from the center of the planet equal to 671,000 km. If the magnitude of the gravitational acceleration at the surface of Jupiter is 2.36 times greater than that on the surface of...

Just curious how this impact would have happened ? Since Jupiter has no core & is all dense gas. Would the pressure have slowed it down until it just exploded? How did the impacts seen from telescope get so big? Was it the extreme winds blowing everything around? Or was it due to a lot more...

Size comparison of WASP-12b (gray) with Jupiter. http://d.yimg.com/a/p/afp/20100524/capt.photo_1274732261799-1-0.jpg Reference: http://en.wikipedia.org/wiki/WASP-12b" http://en.wikipedia.org/wiki/WASP-12" [PLAIN]http://news.yahoo.com/s/afp/20100524/ts_alt_afp/usscienceastronomy"

Is it simply a cost issue that we haven't sent a probe into the depths of Jupiter that can withstand the pressure, or are we just not capable of engineering something that can handle it? I realize that the pressures are far more immense than they are anywhere on Earth, but it seems like the...

Homework Statement The moon Europa, of the planet Jupiter, has an orbital period of 3.55 days and an average distance from the center of the planet equal to 671,000 km. If the magnitude of the gravitational acceleration at the surface of Jupiter is 2.36 times greater than that on the...

http://www.dailymail.co.uk/sciencetech/article-1277734/Jupiter-loses-stripes-scientists-idea-why.html Interesting little tidbit here..article says amateur spotted it..anyone else notice this? Either way, any ideas on what could cause Jupiter to lose a stripe? I was under the assumption...

ala the sun? Jupiter's upper atmosphere is composed of about 88–92% hydrogen and 8–12% helium http://en.wikipedia.org/wiki/Jupiter considering many nuclear weapons have a fusion stage would the explosion propogate? what would rain on my parade?

Homework Statement What multiple of the energy needed to escape from Earth gives the energy needed to escape from (a) the Moon and (b) Jupiter? Use the Table (link below) if necessary http://edugen.wiley.com/edugen/courses/crs1650/art/qb/qu/c13/fig13-19.gif Homework Equations...

http://www.pluggakuten.se/wiki/images/7/7b/Grav%2C.JPG orbital time is 22 h and 50 min. how can I rcalculate mssan for Io? The mass fore Jupiter is 318\cdot 5,98\cdot 10^24 totally mean distance from Jupiter to Io is: \frac{T^2}{r^3}=\frac{4\pi ^2}{GM}\rightarrow r^3=\frac{T^2GM}{4\pi...

Homework Statement Jupiter is about 320 times as massive as the Earth. Thus, it has been claimed that a person would be crushed by the force of gravity on a planet the size of Jupiter since people can’t survive more than a few g’s. Calculate the number of g’s a person would experience at the...

Is this real stuff? My first reaction was that that must be fake. Somebody just composed some sounds effects, and is making fun of astronomy. I didn't succeed in finding any debunking for that though, from the internet, yet. Then I found this NASA site...

Homework Statement Given that Jupiter has a mass of 1.9*10^27kg, and the sun has a mass of 1.99*10^30kg: a)Calculate the value of Kepler's constant for JupiterHomework Equations k = r^3/T^2 K = G(M+m)/4pi^2The Attempt at a Solution Well since the question only gave me the mass of Jupiter and...

http://www.nasa.gov/topics/solarsystem/features/jup-20090720.html

There is an Asteroid Belt between Mars and Jupiter. I have a few questions about it. Where does it start and end (Radius from the Sun)? Also, the Right Ascensions and Declinations of the extents of the belt or if it is continuous around the sun? I know that some of the larger asteroids...

ok just a couple orbital questions I forget the equation that needs to be used and do not have my textbook with me so if anyone knows the equation for finding orbital speed that would be great! 1. calculate the speed of a satellite in orbit 9.5 x10^3 km above jupiter. radius of Jupiter =...

Hi. Thanks for your help. I have a Bushnell Mak Cassegrain 100mm telescope. I can focus Saturn in pretty clearly, except that I can't find the right eyepiece that would allow me to view the rings to any degree. I can see a moon around it. Also, when I focus in on Jupiter, it looks smaller...

Homework Statement I'm trying to solve a problem related to the solar wind pressure at Jupiter but I'm stuck at calculating the density. It is stated that the solar wind has a density of 5 [itex]cm^{-3}[/tex] and a speed of 400 km/s at the orbit of the Earth, and that it should be assumed...

my problem involves creating a graph of log10(a) vs log10(P) and to calculate the mass of Jupiter from the graph. I have created the graph and it seems to be right since the of the trend line is 3/2. My problem is that I am unsure how to go about calculating the mass from the graph. I...

[b]1. 1. Analytical With the help of `Maths27', formulate the problem of when to launch the satellite, based upon the radii of the orbits of Earth and Jupiter, assuming that both planets have circular orbits and ignoring all potentials except that of the sun. Provide the equations of motion...

Homework Statement Io, a satellite of Jupiter has an orbital period of 1.77 days and an orbital radius of 4.22 x 10^5 km. From this Data determine the mass of Jupiter Homework Equations 4pie^2/GM Kepler's Third Law The Attempt at a Solution I keep getting turned around. I know the...

I know it's not a bright question, but I'd like to know the answer as well. I've read that the high atmosphere of Jupiter contains molecules of Hydrogen (H_2). It is well known that (under Earth atmosphere at least), this gas is highly explosive. I just wonder why the atmosphere of Jupiter...

Ok, so this is a homework question so i assume i put it in this forum (i'm new to this). I have been going over this for the longest time and have no clue on how to solve it please help. The marduk spacecraft will be lifted to low orbit using a traditional chemical rocket Rei=5x10^5 m...

1. Europa was one of the moons discovered by Galileo. It has a mass of 4.9E22 kg and a period of 3.6 days and distance of 6.7E8 m. What is the mass of Jupiter? 2. 3.6 days = 311040 sec F = G m m / r^2 F = Mv^2 / r T^2 = (4pi^2/Gm) R^3 3. I threw the numbers into Kepler's formula and get a...

How might hot jupiters arrrive close in, since gas sufficient for their formation would be seem to be further outward? It might seem to require a 3-body 'solution'. That is, must another gas giant have been in the mix for much earlier stages? Perhaps ejecting 1 giant, and retaining the other in...

Absence of Jupiter... Jupiter instantaneously vanishes. What are some events likely to happen? Accretion of the asteroid belt? How immediately detrimental to Earth would this be?

Water found on distant planet from PhysicsWeb News at 17:01 PM GMT An international team of astronomers has obtained the first convincing evidence of water in the atmosphere of a planet outside our solar system. They came to this conclusion using NASA's Spitzer Space Telescope to measure the...

We debated on it, scientest were divided oner Pluto is a planet. I say I could be a special type. People are thinking it's an escaped moon or a Keiper belt object. I just don't see since Ceres an asteroid is being considered as a planet and it's far smaller. Then there's Jupiter. Aside from...

Homework Statement Finally, develop models for only the four innermost planets and the four Galilean moons by reducing all the orbital radii by a factor that makes the orbital radius of the first planet or moon equal to one. Give possible reasons for the similarities and/or differences in two...

Can someone explain why it happens - on Jupiter? here's a pic http://upload.wikimedia.org/wikipedia/commons/8/8e/Jupiter.Aurora.HST.UV.jpg

Hi! I'm new to Physics Forums and even thought i can't say I know much, I'm interrested at learnig new things. I'm also doing my best to practice my english. I've read you rules and trying to get familiar with them.. Here it goes. I have a question I hope to post in the right Sub-Forum...

I set up my scope on my deck at my new townhouse for the first time last night. It was pretty good, though my scope's tracking was pretty mediocre. First up, Jupiter, with Callisto to the left, Ganymede and Europa to the right, and Io in front, casting a shadow. Next, comet...

Now I know the chance that self ignition of Jupiter has less chances than a snowball has to survive in hell. Have there been however serious studies towards the possibility or impossibility of triggering ignition? If the density (Lawson's criterion) and chemical composition (not too many heavier...

I read a recently launched spacecraft is going to pluto and is swinging around Jupiter to help it speed up. I don't understand much about physics but surely the planets gravity will give as much kinetic energy as it takes away, once the craft is moving away from the planet. How can it...

Jupiter as a Gravitational lens?? I remember reading in a swedish science mag about a planed probe to the solar foci 550 AU from the sun. When there it would use the gravity lensing of the sun as a telescop. But getting a probe out there and the cost of the project seems like to much of a...

Spacecraft voyager 2 (of mass m and speed v relative to the sun) approaches the planet Jupiter (of mass M and speed v_J relative to the sun). The spacecraft rounds the planet and departs in the opposite direction. What is its speed, relative to the sun, after this slingshot encounter, which...

Executive Summary more at - http://www.spaceref.com/news/viewsr.html?pid=12642 Report in pdf - http://ossim.hq.nasa.gov/jimo/JIMO_SDT_REPORT.pdf

http://www.spacescience.com/headlines/y2000/ast08may_1.htm The asteroid, named 216 Kleopatra, is a large object in the main asteroid belt between Mars and Jupiter; it measures about 217 kilometers (135 miles) long and about 94 kilometers (58 miles) wide. Kleopatra was discovered in 1880, but...

I want to measure the rotational speed of Io using a spectrograph, using the doppler formula. Since it is rotating around Jupiter, i have to take the velocity relative to jupiter, but I wonder tough how this is possible when Io is not rotating at an right angle to my observation point. Is there...

To calculate the mass of a binary system, one can use keplers law. P^2= (4*(pi)^2*a^3)/(G*(m1+m2)) To get a more accurate mass I must take into account as many moons as possibe for jupiter. Is it possible to change kepler's law alittle to make it accommodate more than a binary system? ty

At the surface of Jupiter's moon Io, the acceleration due to gravity is 1.81m/s^2 . A watermelon has a weight of 49.0N at the surface of the earth. In this problem, use 9.81m/s^2 for the acceleration due to gravity on earth 1.) What is its mass on the surface of Io? 2.) What is its...

Stuck again with this "not so informational" astronomy book, and we need help with a question. What produced the helium in the Suns atmosphere, Jupiters atmosphere, and the suns core? :cry: can anyone help us?

How would Saturn and Jupiter look in a telescope of 6 or 8 inch aperture at about 200 to 250 power? I've read some extremely varying answers to this on the internet, so I was hoping someone with firsthand observational experience could help me out here. For example, what size would they appear...

http://space.com/scienceastronomy/jupiter_spots_040421.html

http://www.abc.net.au/midnorthcoast/stories/s1057580.htm

Nothing big, just to remind you that Jupiter is really close to Earth, you can see it just right from the Moon; I think that it’s one of most shiny objects on the sky tonight, and nights to come. It just weird you imagine it like the biggest object after the sun in our system, and jet when...

1) It is desired to use an encounter with Jupiter to send a spacecraft on a trajectory which barely escapes the solar system. The spacecraft is launched from Earth onto a trajectory whose aphelion is at Jupiter’ s orbit. Determine how close to the surface of Jupiter the spacecraft must...

Some researchers believe radioactive and tidal heating may form deep reservoirs of liquid water beneath the ice and that life forms may exist there, enduring the extreme pressures and darkness. Oceanographers have found some bacteria living in such conditions in the Earth's black depths...

I had a rather lengthy discussion with two beings which turned out to have been from the Planet Jupiter. At first I did not know they were Aliens. They appeared to be children, maybe in the 7 to 8 year old range as far as their height and initial appearance. The only difference was their...