Cassini Took One Last Look at a Mysterious Glitch in Saturns Rings Before It Died. Peggy is something along the edge of Saturns ring, a glitch whose source weve never seen. Cassini took a last peek at Peggy during its Grand Finale destructive plunge, adding a final piece to the puzzle for future researchers to pore over when trying to understand this mysterious disturbance. Cassini project veteran Carl Murray of Queen Mary University of London recalls his first sighting of the ring glitch, in early 2. He was studying an image of Saturns moon Prometheus at the outside edge of the A ring, deliberately exposed to show the background stars. We saw this kind of bump glob feature object whatever, he told me last week, during the lunch break of the Cassini final Imaging Team meeting, as we chatted at the Huntington Botanical Gardens near Caltech. We obviously wanted to know, Was it real said Murray. Interpreter Edge Generic Edition Nathan' title='Interpreter Edge Generic Edition Nathan' />Most talk of matchfixing in tennis comes cloaked in too many layers of anonymity to feel genuinely juicy. When the Tennis Integrity Unit, the independent body. Get exclusive film and movie reviews from THR, the leading source of film reviews online. We take an honest look at the best and worst movies Hollywood has to offer. He and his team quickly checked previous images of the area, and now that they knew what they were looking for, they kept finding that strange, stepped out glitch in the otherwise smoothly curving edge of the A ring. The day I found it was my mother in laws birthday, Murray recalled, so he named it Peggy in her honor. It seemed appropriate. Soon, the teams questions about Peggy expanded What is itWhere did it come from Where is it going he explained. Weve been tracking it almost ever since. Murray and his colleagues realized the glitch must be caused by an object embedded in the rings. Weve never actually resolved the object, Murray said. All we can do is track the glitch. Measuring the size of the disturbance, he quickly realized it couldnt possibly be a solid moon. It would be a massive Titan size moon, Murray explained. Steve Reich Vermont Counterpoint Pdf To Word. If a moon that size was there, it would be totally disrupting the ring. Instead, he figured it must be a dense cloud of dust and debris, possibly encompassing a proto moon that hasnt yet broken free as an independent object. As the mysterious object drifts closer to and farther from Saturn within the rings, it causes the glitch along the outer edge to change speeds. By measuring the speed of the glitch, we can measure the orbital parameters of the object, Murray explained. Including Peggy in Cassinis final six images of the Saturn system was partly sentimental, but the spacecraft was also collecting valuable scientific information. Every image we get which should contain Peggy is yet another data point that will help us understand what it is, where it is, where its come from, and where its going to go even when were not around to take images any more, Murray said. The fact that its one of the last images from Cassini is touching, but were doing it for science. But tracking an object when you dont know what exactly that object is can be tricky. Cassinis imaging team has found Peggy time and time again, but not always where and when they expected it. Peggy is something along the edge of Saturns ring, a glitch whose source weve never seen. Cassini took a last peek at Peggy during its Grand Finale destructive. Complete Technical Acronyms, Glossary Definitions for PC, SAN, NAS, QA, Testing, HDTV, Wireless, Linux, Embedded, Networks, Video, Digital, pharma, Unix, Video. Forex Margin Call Explained babypips. Learn what a margin call is in forex trading and watch how quickly you. Sometimes you see it, sometimes you dont, Murray said with a sigh. This uncertainty made planning the final image tricky. We actually gave Peggy a large margin of error because its a bit wayward sometimes. Adding to the complexity of the shot, Cassini was on the far side of the system, shooting the rings from across the planet. This means the resolution was lower at 2. Peggys characteristic glitch will only be a few hundred pixels in the image. Murray and his team stayed up late Thursday night waiting for the raw images to download. They brought everything they needed to analyze Peggy right away, working off nervous energy before joining others in standing vigil for Cassinis final moments. When I checked in with him via email on Friday, Murray was optimistic but uncertain Cassini had successfully found Peggy one final time, writing, I would like to think that it is in the one that also contains Daphnis, a tiny moon of Saturn that lies within the Keeler Gap of Saturns A ring, he said, before linking me to the raw image. Kevin Gill stayed up late on Thursday processing Cassinis final images for release on Friday morning. I couldnt find Peggy in the data though Im still looking, he told me, confirming the glitch is being characteristically difficult to identify. Peggys probably there, I just havent found exactly where yet. Im used to every day going to the computers when the images come down to just look for fun stuff, like Peggy explained Murray. Its going to take me awhile to get used not getting to see these images every day. Cassinis mission is done, and its raw image gallery will never have a new update. But Murray, his postdoc, and the rest of the mission scientists still have fruitful years ahead of them poking through thirteen years of data and trying to understand this beautiful, complex Saturnian system. Perhaps, theyll even come to understand Peggy a little bit better.