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Tuesday, March 30, 2010

March 29 - Odd Cloud on Neptune Seen Splitting Into Two‏

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More solar system weather changes...Paste the link if you don't receive the images/can't access the links.

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Odd Cloud on Neptune Seen Splitting Into Two

By Andrea Thompson Senior Writer
posted: 29 March 2010
8:03 am ET

These images of the south pole of Neptune show the two spots created from a single storm converge back into one as seen by astronomers in July 2007. Credit: S. H. Luszcz-Cook1/I. de Pater/M. Ádámkovics, and H. B. Hammel.


A cloudy patch that is typically seen over the south pole of Neptune was spotted in double by astronomers after it briefly split in two, as viewed by ground-based telescopes in 2007.

The cloud feature has been seen near Neptune's south pole since the Voyager 2 spacecraft visited the planet in the late 1980s. But what exactly it was and what processes on the planet generated it weren't known then, as telescopes on Earth can't see Neptune well enough to resolve such small features.

"What we knew about it was that there was a spot," said Mate Ádámkovics, a researcher at the University of California, Berkeley and a member of the team that made the new observations.

In 2007, measurements indicated that the atmosphere at the pole was warmer than those at other latitudes, which suggested that the feature near Neptune's pole could be similar to the persistent storm seen over Saturn's south pole. Saturn's polar vortex seems to be a much larger version of hurricanes on Earth, only stationary. Like a hurricane, that polar vortex features a calm eye surrounded by a wall of bright clouds.

From July 26 to 28, 2007, a team of astronomers observed Neptune with the 10-meter Keck II telescope atop Mauna Kea, Hawaii. The observations from July 26 showed two distinct features near Neptune's south pole, not one. But on the 28th, there was only a single cloud feature again.

The team analyzed the observations and determined that the double cloud feature changing was real, and not just a case of low resolution seeing what was really two clouds as one.

The finding, detailed in a paper accepted to the journal Icarus and posted as a pre-print paper to the online site arXiv, suggests that the cloud feature sits in a regions of strong convection, or overturning layers of the atmosphere. The observation is another piece of evidence suggesting a similarity between the polar atmosphere of Neptune and that of Saturn, Ádámkovics told

To really find out details about the cloud feature though, a spacecraft would have to fly to Neptune and take more close-up pictures, Ádámkovics added. The team does plan to apply for more telescope time to see if they can catch the cloud splitting again though.

Understanding the dynamics that cause the cloud feature on Neptune and how they relate to those on Saturn doesn't just help in our quest to better know our own solar system. Because most of the extrasolar planets that have been found so far are also gas giants, investigating the planets in our solar system directly impacts our understanding of those in other systems, Ádáms said.

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How to Digitally Record/Video a UFO sighting:

Como registar digitalmente ou gravar um vídeo de um avistamento de um UFO:

Stabilize the camera on a tripod. If there is no tripod, then set it on top of a stable, flat surface. If that is not possible lean against a wall to stabilize your body and prevent the camera from filming in a shaky, unsteady manner.

Estabilize a camera com um tripé. Se não tiver um tripé, então coloque-a em cima de uma superfície estável. Se não for possível, então encoste-se a uma parede para estabilizar o corpo e evitar que a camera registe de maneira tremida e instável.

Provide visual reference points for comparison. This includes the horizon, treetops, lampposts, houses, and geographical landmarks (i.e., Horsetooth Reservoir, Mt. Adams, etc.) Provide this in the video whenever is appropriate and doesn’t detract from what your focus is, the UFO.

Forneça pontos visuais de referência para comparação. Isso inclui o horizonte, cimo das árvores, postes de iluminação, pontos de referência geográficos (como o Reservatório de Horsetooth, Mone Adams, etc) Forneça esses pontos no vídeo sempre que for apropriado e não se distraia do que é o seu foco, o UFO/a Nave.

Narrate your videotape. Provide details of the date, time, location, and direction (N,S,E,W) you are looking in. Provide your observations on the weather, including approximate temperature, windspeed, any visible cloud cover or noticeable weather anomalies or events. Narrate on the shape, size, color, movements, approximate altitude of the UFO, etc and what it appears to be doing. Also include any unusual physical, psychological or emotional sensations you might have. Narrate any visual reference points on camera so they correlate with what the viewer will see, and thereby will be better able to understand.

Faça a narração do vídeo. Forneça pormenores sobre a data, hora, local e direcção (Norte, Sul, Este, Oeste) que está a observar. Faça observações sobre as condições atmosféricas, incluindo a temperatura aproximada, velocidade do vento, quantidade de nuvens, anomalias ou acontecimentos meteorológicos evidentes. Descreva a forma, o tamanho, a cor, os movimentos, a altitude aproximada onde se encontra o UFO/nave, etc e o que aparenta estar a fazer. Inclua também quaisquer aspectos pouco habituais de sensações físicas, psicológicas ou emocionais que possa ter. Faça a narração de todos os pontos de referência visual que o espectador irá ver e que, deste modo, será capaz de compreender melhor.

Be persistent and consistent. Return to the scene to videotape and record at this same location. If you have been successful once, the UFO sightings may be occurring in this region regularly, perhaps for specific reasons unknown, and you may be successful again. You may also wish to return to the same location at a different time of day (daylight hours) for better orientation and reference. Film just a minute or two under “normal” circumstances for comparison. Write down what you remember immediately after. As soon as you are done recording the experience/event, immediately write down your impressions, memories, thoughts, emotions, etc. so it is on the record in writing. If there were other witnesses, have them independently record their own impressions, thoughts, etc. Include in this exercise any drawings, sketches, or diagrams. Make sure you date and sign your documentation.

Seja persistente e não contraditório. Volte ao local da cena e registe o mesmo local. Se foi bem sucedido uma vez, pode ser que nessa região ocorram avistamentos de UFOs/naves com regularidade, talvez por razões específicas desconhecidas, e talvez possa ser novamente bem sucedido. Pode também desejar voltar ao mesmo lugar a horas diferentes do dia (durante as horas de luz)para ter uma orientação e referência melhor. Filme apenas um ,inuto ou dois em circunstâncias “normais” para ter um termo de comparação. Escreva tudo o que viu imediatamente após o acontecimento. Logo após ter feito o registo da experiência/acontecimento, escreva imediatamente as impressões, memórias, pensamentos, emoções, etc para que fiquem registadas por escrito. Se houver outras testemunhas, peça-lhes para registar independentemente as suas próprias impressões, pensamentos, etc. Inclua quaisquer desenhos, esbolos, diagramas. Certifique-se que data e assina o seu documento/testemunho.

Always be prepared. Have a digital camera or better yet a video camera with you, charged and ready to go, at all times. Make sure you know how to use your camera (and your cell phone video/photo camera) quickly and properly. These events can occur suddenly, unexpectedly, and often quite randomly, so you will need to be prepared.

Esteja sempre preparado, Tenha sempre uma camera digital, melhor ainda, uma camera vídeo consigo, carregada e pronta a usar sempre que necessário. Certifique-se que sabe como lidar com a sua camera (ou com o seu celular/camera fotográfica) rápida e adequadamente. Esses acontecimentos podem acontecer súbita e inesperadamente e, por vezes, acidentalmente, por isso, necessita estar preparado.

Look up. Be prepared. Report. Share.

Olhe para cima, Esteja preparado, Relate, Partilhe.



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