New Horizons: Jupiter Encounter. Through 2007.

portercc · Mar 15, 2007

Unless they are overexposing to accent volcanic display...I'd rather see both.

3488 · Mar 16, 2007

Hi there. brellis is correct. That was exactly where I got the crescent Io from!!! It is a great image & New Horizons is certainly delivering BIG TIME!! I enjoy doing these images & it gives me a chance to see more in them. Have you looked at the incredible images provided by rlb2? Like me, he sees more detail & features when he processes the Mars Exploration Rover or Mars orbiter images, really no different to the Io images I do here (except for he is very much better than I am, he is a real Pro. I am just an amateur). Look at the Io images that he has contributed on this thead. They are just fantastic. If New Horizons continues to perform as she has at Jupiter, the Pluto system encounter will be a walk in the park!!!!!! -------------------------------------------------------------------------------------------------------------------------------------------------- On February 24, 2007, the LEISA (pronounced "Leesa") infrared spectral imager in the New Horizons Ralph instrument observed giant Jupiter in 250 narrow spectral channels. At the time the spacecraft was 6 million kilometers (nearly 4 million miles) from Jupiter; at that range, the LEISA imager can resolve structures about 400 kilometers (250 miles) across. That may seem large, mission scientists say, but Jupiter itself is more than 144,000 kilometers (89,000 miles) across. "The detail revealed in these images is simply stunning," says Dr. Dennis Reuter, Ralph/LEISA project scientist and a New Horizons co-investigator from NASA's Goddard Space Flight Center in Greenbelt, Md. "Our instrument is performing spectacularly well." LEISA observes in 250 infrared wavelengths, which range from 1.25 micrometers (mm) to 2.50 mm. The three images shown above from that dataset are at wavelengths of 1. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Mar 16, 2007

Below. The Pluto bound New Horizons spacecraft captured this view of the volcanic Jupiter moon Io on Saturday 24th February 2007, with the LORRI (Long Range Reconnaissance Imager) camera, from 7.5 million kilometres / 4.25 million miles. Clearly visible is the Pele volcano with its fall out ejecta ring, slightly to the lower right of centre. Pele’s ring appears to have changed shape since last seen by the Galileo orbiter, some four years ago, becoming even more elongated in a North to South direction. This has been happening since being first imaged as a large heart shaped feature by Voyager 1 in March 1979. Voyager 2 four months later in July 1979 showed it to be more oval. The Galileo Orbiter showed it to be more oval yet & in February 2007 the Pluto bound New Horizons has shown this trend continuing!!! The large collapsing mountains Boosaule Montes (Boosaule Mons itself rises 15,800 metres / 52,000 feet above the surrounding terrain) can just be mad out at the 11 o clock position on Pele's ejecta ring. The large Pillan Patera dark fall out ring (at the three o clock position on the Pele ring) appears to have been covered up by newer lighter toned sulphur. The volcano itself is clearly visible. The large black feature to the lower left (south west) is another large volcano, Babbar Patera. At the ten o clock position, near the limb of Io is Loki Patera, highly foreshortened. Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

alokmohan · Mar 17, 2007

LIESA?

MeteorWayne · Mar 17, 2007

Linear Etalon Imaging Spectral Array (LEISA). It's part of Ralph, this is from the New Horizons Scie4nce Package page. <div class="Discussion_UserSignature"> But the Krell forgot one thing John. Monsters. Monsters from the Id. I really, really, really, really miss the "first unread post" function </div>

alokmohan · Mar 18, 2007

American spacecraft have reached every planet from Mercury to Neptune. Now, Nasa's New Horizons mission to Pluto and the Kuiper Belt - the space agency's first launch to a "new" planet since Voyager nearly 30 years ago - will allow the US to complete its reconnaissance of the solar system. New Horizons, launched on January 19 last year, is designed to make the first reconnaissance of Pluto and its massive moon Charon which together make up a "double planet". The spacecraft is then designed to visit one or more objects in the Kuiper Belt region beyond Neptune - the icy "third zone" of our solar system that is the major source of comets. The solar system has three classes of planets: the rocky worlds (Earth, Venus, Mercury and Mars); the gas giants (Jupiter, Saturn, Uranus and Neptune); and the ice dwarfs of the Kuiper Belt, including Pluto, which was downgraded last year to the status of "dwarf planet" by the International Astronomical Union. There are far more ice dwarf planets than rocky and gas giant worlds combined but no spacecraft have yet visited a planet in this class. Pluto's largest moon, Charon, is half the size of Pluto. The pair form a binary planet, whose gravitational balance point is between the two bodies. Although binary planets are thought to be common in the galaxy, as are binary stars, no spacecraft has explored one yet. New Horizons will be the first mission to a binary object of any type, says Nasa. Pluto's atmosphere is escaping to space like a comet, but on a planetary scale, the space agency adds. "Nothing like this exists elsewhere in the solar system. It is thought that the Earth's original hydrogen/helium atmosphere was lost to space this way. "By studying Pluto's atmospheric escape, we can learn a great deal about the evolution of Earth's atmosphere. "New Horizons will determine Pluto's atmospheric structure and composition and directly

3488 · Mar 19, 2007

Thanks alokmohan. Yesterday I understand Pluto occulted a star. Hopefully this will yeild new information. I.e is the atmosphere collapsing, what is its compostions, temperature, density profile, etc. All important up front information before New Horizons arrive. ======================================================== On March 18, just before 11:00 UTC, tiny Pluto will wander across a background star, an event called an "occultation" by astronomers. The event will be visible and in full darkness from the western half of the United States and from almost all of Mexico. The background star will be blocked from sight for about six minutes. An occultation isn't just a fun coincidence; there is extremely valuable science that can be performed by watching this event with a sensitive telescope. According to Bruno Sicardy of the Observtoire de Paris, amateur instruments as small as 25 centimeters in size could "yield extremely valuable contribution for pinning down the astrometry of the event (combining various occultation chords), by helping to detect a possible central flash, and by giving firmer confirmation on possible changes occurring right now in Pluto's tenous atmosphere." Remember, Pluto does have a thin atmosphere, and it is predicted to be freezing to the surface over time as Pluto wanders farther from the Sun. By watching the star vanish behind Pluto, observers can determine the height and density of the atmosphere by the way the light fades before it goes out. Sicardy's page has all the details for interested observers. One fact that I find pretty surprising is that Pluto's ephemeris -- the numbers describing its orbital position and velocity -- are uncertain enough to noticeably affect predictions of where and when the event will happen. Uncertainties on the predictions for the position of Pluto mean that where on Earth an observer has <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Mar 20, 2007

Blow up & enhancement of the anticyclonic (high pressure) storm Red Spot Junior from the Pluto bound New Horizons LORRI camera. Red Spot Junior rotates counter clockwise as in Jupiter's southern hemisphere (the same direction as the Great Red Spot). Saturday 24th February 2007 from 3.4 million kilometres. Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Mar 20, 2007

Position of New Horizons as of: Tuesday 20th March 2007 @ 1:00 PM GMT. Heliocentric Velocity: 21.97 KPS / 13.64 MPS or 79,092 KPH / 49,116 MPH. Distance from Sun: 5.56 AU. Distance forom Jupiter: 0.22 AU. Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

anthmartian · Mar 21, 2007

Hi, My first post here. So hello to all. Here are a couple of "New Horizon's" Io pictures i put up on my site, which i hope serves as a kind of dossier for those wishing to get to know me. I was very pleased to see this topic, as i hit the New Horizon's site several times a day hoping to see new stuff. http://anthmartian.googlepages.com/new-io.jpg/new-io-full.jpg http://anthmartian.googlepages.com/io-march17.jpg/io-march17-full.jpg http://anthmartian.googlepages.com/thisislandearth <div class="Discussion_UserSignature"> "Traveling through hyperspace ain't like dusting crops, boy! Without precise calculations we could fly right through a star, or bounce too close to a supernova and that'd end your trip real quick, wouldn't it?"Han Solo - 1977 - A long time ago in a galaxy far far away.... Click Here And jump over to my site. </div>

3488 · Mar 21, 2007

Hi Anthmartian. A brilliant first post & welcome to SDC. Like your website & your crescent Io image. I had some luck also earlier on in the thread with enlarging & enhancing that same image. I used Adobe Photoshop Home Version. On your image the Hi'iaka Montes are very clearly visible on the evening terminator. I am trying to convince NASA to send a dedicated mission to Io, & this tread by brellis has thrown up many interesting ideas!!! Have you checked out this thread by rlb2? His Mars images are just amazing!!! =======================================================================. This graphic illustrates the pointing and shows the data from one of many observations made by the New Horizons Alice ultraviolet spectrometer (UVS) instrument during the Pluto-bound spacecraft's recent encounter with Jupiter. The red lines in the graphic show the scale, orientation, and position of the combined "box and slot" field of view of the Alice UVS during this observation. The positions of Jupiter's volcanic moon, Io, the torus of ionized gas from Io, and Jupiter are shown relative to the Alice field of view. Like a prism, the spectrometer separates light from these targets into its constituent wavelengths. "These ultraviolet datasets are spectacular, simply spectacular," said New Horizons Principal Investigator Dr. Alan Stern, of the Southwest Research Institute, who also serves as PI of the Alice instrument. "The team is ecstatic over the richness of the spectral data and what that promises to reveal about Io's complex relationship with Jupiter." Dr. Kurt Retherfo <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

anthmartian · Mar 21, 2007

Thanks loads 3488, for your kind words. <img src="/images/icons/smile.gif" /> I just can't describe the thrill i get from looking initialy at the images released on any solar system exploration mission. Then i get wowed again when i see what people have done with those amazing pictures. All i can say is thank god for the internet. Before the days of browsing through space missions online, you should have seen my monthly magazine bill! I am just getting started here in the forums, although i have visited space.com for many years ( i only just noticed the community section! still, it proves that i'm mesmorized by the images on the site! ) I'm looking forward to seeing everything and chatting. I just had a look at the Mars images topic. Wonderful stuff. The Io pictures in here, especialy the plume enhancements blew me away this morning. Well done all involved. <img src="/images/icons/smile.gif" /> Anth http://anthmartian.googlepages.com/thisislandearth <div class="Discussion_UserSignature"> "Traveling through hyperspace ain't like dusting crops, boy! Without precise calculations we could fly right through a star, or bounce too close to a supernova and that'd end your trip real quick, wouldn't it?"Han Solo - 1977 - A long time ago in a galaxy far far away.... Click Here And jump over to my site. </div>

3488 · Mar 23, 2007

The New Horizons Long Range Reconnaissance Imager (LORRI) has returned stunning new images of Jupiter's Little Red Spot, obtained as a 2-by-2 mosaic at 0312 UTC on February 27, 2007, from a distance of 3 million kilometers (1.8 million miles). The image scale is 15 kilometers (about 9 miles) per pixel. By comparison, team members say, ground-based and Earth-orbiting imagers rarely do better than 200-kilometer (130-mile) resolution on Jupiter. "These LORRI images of the Little Red Spot are amazing in their detail," says New Horizons Project Scientist Dr. Hal Weaver, of the Johns Hopkins University Applied Physics Laboratory, where the spacecraft and LORRI camera were designed and built. "They show the early stages of this newly reddened storm system with a resolution that far surpasses anything available until now." LORRI took this mosaic 9½ hours - or not quite one Jupiter rotation period - after snapping its previous images of the Little Red Spot on Feb 26, 2007, at a longer range of 3.5 million kilometers (2.2 million miles) and at a lower resolution of 17 kilometers (10.5 miles) per pixel. The new mosaic was obtained with the Little Red Spot closer to the center of the visible disk of Jupiter, so there is less foreshortening and better illumination. The Little Red Spot is an Earth-sized storm on Jupiter that changed its color from white to red in 2005. Swimming to the east, its clouds rotate counterclockwise (or in the anticyclonic direction), meaning that it is a high-pressure region. In that sense, the Little Red Spot is the opposite of a hurricane on Earth, which is a low-pressure region - and it is of course much larger than any hurricane on Earth. Scientists don't know exactly how or why the storm turned red - though they speculate that the change could stem from a surge of exotic compounds from deep within Jupiter, caused by an intensification of the storm system. In particular, sulfur-bearing cloud droplets m <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

mithridates · Mar 23, 2007

You know what's interesting is sometimes I find myself getting more chills not from thinking of the planet or moon that a probe has passed by but by thinking of it from the moon's point of view, that a planet further in towards the sun has constructed a machine made specifically to fly right by. <div class="Discussion_UserSignature"> ----- http://mithridates.blogspot.com </div>

anthmartian · Mar 23, 2007

fantastic image. You really have to appreciate the great job the new Horizon's team have done with the imagery. Especially considering the very low light levels the hard ware was designed to operate in. Jupiter is a very bright neighbourhood in comparison to Pluto and the Kuiper belt. The exposure times on these images are amazingly short. I'm visiting the site quite a bit, more than is healthy probably, waiting for more images, so if its down when you go, blame the bandwidth problems on me. hehe Here's the results of some of my tinkering tonight with old ( well, i say old, they feel old now, even though they are not. ) approach images taken of Io. Anth http://anthmartian.googlepages.com/thisislandearth <div class="Discussion_UserSignature"> "Traveling through hyperspace ain't like dusting crops, boy! Without precise calculations we could fly right through a star, or bounce too close to a supernova and that'd end your trip real quick, wouldn't it?"Han Solo - 1977 - A long time ago in a galaxy far far away.... Click Here And jump over to my site. </div>

3488 · Mar 26, 2007

Hi Anthmartian. Great Io images. Do I have your permission to download & print them?? I have already done some analysis of the New Horizons Io images & have already noted some notable changes in Io, since Galileo. Below is the large cratered planet sized outermost Galilean moon Callisto (Jupiter's second largest & the third largest in the entire solar system). New Horizons LORRI image from 4.2 million kilometres. Wednesday 28th February 2007. I have enhanced it. The Valhalla impact basin is clearly seen. Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

anthmartian · Mar 26, 2007

Andrew. Thank you, and certainly you can download and print, that's the very reason i've done any work on them. For myself and others. <img src="/images/icons/smile.gif" /> It is very interesting to look back at old missions, and bring out detail on these to compare. Especialy as this is the last visit to Jupiter until 2015. Looking forward to your image being approved. I've just this moment updated my home pages with more images of Jupiter's moons. Europa, Ganymede, and Callisto ( never very photogenic...poor battered thing! ) Updates are always announced top left of my front page. http://anthmartian.googlepages.com/thisislandearth On the subject of downloading, using the images here etc, it would be great to see all these images by various members put in one place and categorized on line. It would serve a few purposes. Obviously it would be very interesting to many people. It would also show it can be done, and many enthusiastic amatuers can contribute a lot to a mission of this kind. I certainly think that's been the case here. Anybody visiting will have come away with much more than simply just visiting the official site. <div class="Discussion_UserSignature"> "Traveling through hyperspace ain't like dusting crops, boy! Without precise calculations we could fly right through a star, or bounce too close to a supernova and that'd end your trip real quick, wouldn't it?"Han Solo - 1977 - A long time ago in a galaxy far far away.... Click Here And jump over to my site. </div>

llivinglarge · Mar 26, 2007

Did NH snap any pictures of Ganymede?

anthmartian · Mar 26, 2007

llivinglarge : If you click on the link in my post above you'll see some. But, here's one i put on my home page this morning. also, here's the link to the official site image release pages. http://pluto.jhuapl.edu/soc/ <div class="Discussion_UserSignature"> "Traveling through hyperspace ain't like dusting crops, boy! Without precise calculations we could fly right through a star, or bounce too close to a supernova and that'd end your trip real quick, wouldn't it?"Han Solo - 1977 - A long time ago in a galaxy far far away.... Click Here And jump over to my site. </div>

3488 · Mar 27, 2007

Hi livinglarge. Please see this link. It is an Annotated image of Ganymede from New Horizons, I did a while ago. It is the same view of the giant planet sized moon as the one above by Antmartian, but annotated. Thanks Antmartian for your continued posts. Please keep them coming. Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Mar 27, 2007

Hi Anthmartian & livinglarge. Below is an earlier view of Ganymede taken by New Horizons. This view of the giant internally differentiated Jovian moon is from a different angle, from further east than the views posted by Anthmartian & myself earlier. The LORRI image was taken from a distance of 5 million kilometres / 3.1 million miles on: Monday 26th February 2007. Ganymede orbits Jupiter at an average distance of 1,070,000 KM / 664,000 miles, about once every 7 days & 2 hours. Ganymede has a diameter of: 5,262 KM / 3,268 miles, slightly larger than Mercury at 4,880 KM / 3,030 miles. However the density of Mercury is about 5.3g cm/3 where as Ganymede's is about 1.94g cm/3. This is due to Mercury having a huge Iron core surrounded by a silicate mantle & crust. Ganymede has a smaller iron core, & smaller silicate mantle surrounded by a thick ice crust. Ganymede thorugh repeated tracking by the four close approaches of the Galileo orbiter in the late 1990s (June 27, 1996, September 6, 1996, April 5, 1997 & May 7, 1997), revealed Ganymede to be internally differentiated. There appears to be a metal core (possibly partially molten & possibly even double layered like Earth's, inner & outer cores), a rocky mantle & a thick ice crust (about 700 KM / 434 miles thick). Ganymede has its own internally driven magnetosphere, the only moon in the solar system known to have one (Europa & Callisto have induced fields from Jupiter's magnetosphere). The maximum surface temperature of Ganymede is a fairly 'warm' (given the distance from the Sun) minus 113 Celsius on the equator, but at night & at the poles, it drops to below minus 225 Celsius!!! Ganymede appears to have an extremely tenous 'atmosphere' of Ozone (O3), thought to be liberated Oxygen atoms being liberated from the ice, & the radiation trapped within Jupiter's magnetosphere, bonding the Oxygen <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Mar 27, 2007

Below is an enlarged view of Callisto taken by New Horizons. The 4,000 KM / 2,484 mile wide (including 25 concentric rings that surround the bright centre) Valhalla basin is clearly visible. This view of the giant second largest Jovian moon is enlarged from the image enhanced by Anthmartian. The LORRI image was taken from a distance of 4.2 million kilometres / 2.6 million miles on: Wednesday 28th February 2007. All I have done is rotated it so north is at top, cropped & enlarged it. Please see his web site: http://anthmartian.googlepages.com/thisislandearth Callisto orbits Jupiter at an average distance of 1,883,000 KM / 1,170,000 miles, about once every 16 days & 17 hours. Callisto keeps the same hemisphere turned towards Jupiter, as the moon does to Earth. Callisto has a diameter of: 4,806 KM / 2,985 miles, only slightly smaller than Mercury at 4,880 KM / 3,030 miles. However the density of Mercury is about 5.3g cm/3 where as Callisto's is about 1.86g cm/3. This is due to Mercury having a huge Iron core surrounded by a silicate mantle & crust. Callisto appears to be largely undifferentiated, composed roughly 60% ice & 40% rock. The rock may had started to settle towards the centre, but stopped short of forming a core. This rock / ice mixture, is overlain by an ice crust. The surface of Callisto is largely covered by a dark, possibly organic rich dusty coating, the source of which is as yet unidentified, although sulphur from the volcanoes on Io, has been detected in small quantities on the Jupiter facing leading hemisphere. Callisto has an induced magnetic field, created from Jupiter's magnetosphere. This has lead to speculation that Callisto my have a shallow subsurface 'ocean' of very saline water. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

3488 · Mar 27, 2007

Below is an enlarged & cropped image of Red Spot Junior, taken by New Horizons using the LORRI on: Tuesday 27th February 2007, from a distance of 3 million kilometres / 1.9 million miles. Clearly visible is the anticyclonic storm itself (rotating in a counter clockwise direction in Jupiter's southern hemisphere). The winds around the circumference of Red Spot Junior are blowing at about 640 KMH / 400 MPH, similar to its bigger older more famous compatriot, the Great Red Spot. There is a crop of gigantic thunderstorms at the top left (north west) & what appears to be a clear gap to the right (east) of the thuderstorms, in the general cloud deck. This gap is likely to be ascending warmer air feeding the thunderstorms (the clockwise hint of a spiral in the clear gap suggests cyclonic / low pressure). The thunderstorms themselves are likely to be producing hailstones the size of footballs, rainfall unlike anything on Earth & lightning discharges, thousands of times more powerful than anything in terrestrial thunderstorms. Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

anthmartian · Mar 27, 2007

3488 : Great work. Like the images a lot. A really cool addition having the annotated image too. I can't believe how the Callisto image blew up, good job. It's never boring! You can't bore people talking about the moons of Jupiter surely!? They are as fresh , exciting, and as fascinating today as they were during that first Voyager fly-past. For many more years than we'll be around they will continue to be fresh and exciting too. As more and more is uncovered. Keep'em coming too please <img src="/images/icons/smile.gif" /> <div class="Discussion_UserSignature"> "Traveling through hyperspace ain't like dusting crops, boy! Without precise calculations we could fly right through a star, or bounce too close to a supernova and that'd end your trip real quick, wouldn't it?"Han Solo - 1977 - A long time ago in a galaxy far far away.... Click Here And jump over to my site. </div>

3488 · Mar 28, 2007

Hi Anthmartian. It shows how good your images are. The Callisto image got to the size above, before it started to pixelate. Perhaps rlb2 & yourself should get together & publish a book & / or CD Rom. You are more than correct. The moons of Jupiter are never boring, not even cratered Callisto!! There is much to learn still about them, although much has already been discovered about them. The Jupiter & Saturn system too are really miniature solar systems in their right!! The Uranus & Neptune systems are unbelievably interesting too!! I am advocating an Io Orbiter & lander, but before arrival in Io orbit I intend to do several close recons on all four of the Galileans (one metre reso or better at closest approach to all four), plus at least one asteroid encounter on route through the Asteroid Belt, as well as observations of at least two of the smaller outer moons, perhaps one each from each 'group', perhaps Himalia (middle Silicate prograde group) & Pasiphae (outer Carbonaceous retrograde group). Not to mention a robust Jupiter observations. So as you see, I have my own plans, just a matter of convincing the right people. Below is a nice image of the anticyclonic (High Pressure) storm Red Spot Junior & another smaller anticyclonic white oval, to the south east. Taken by New Horizons using the LORRI on: Tuesday 27th February 2007, from a distance of 3 million kilometres / 1.9 million miles. Clearly visible is the anticyclonic storm itself (rotating in a counter clockwise direction in Jupiter's southern hemisphere). The winds around the circumference of Red Spot Junior are blowing at about 640 KMH / 400 MPH, similar to its bigger older more famous compatriot, the Great Red Spot. Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

New Horizons: Jupiter Encounter. Through 2007.

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