Cassini Movie of Saturn's Rings

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Winnow
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Cassini Movie of Saturn's Rings

Post by Winnow »

This is a 7mb mpeg file so give it time to load. It's not YouTube.

The movie is taken from the Cassini spacecraft after adjusting its orbit in order to take pictures from above and below the rings.

Cool stuff. Seeing all the little satellites zoom around and how thin the rings are must really geek the scientists out.

http://saturn.jpl.nasa.gov/multimedia/v ... _movie.mpg

Still image below:

Image
Surely one of the most gorgeous sights the solar system has to offer, Saturn sits enveloped by the full splendor of its stately rings.

Taking in the rings in their entirety was the focus of this particular imaging sequence. Therefore, the camera exposure times were just right to capture the dark-side of its rings, but longer than that required to properly expose the globe of sunlit Saturn. Consequently, the sunlit half of the planet is overexposed.

Between the blinding light of day and the dark of night, there is a strip of twilight on the globe where colorful details in the atmosphere can be seen. Bright clouds dot the bluish-grey northern polar region here. In the south, the planet's night side glows golden in reflected light from the rings' sunlit face.

Saturn's shadow stretches completely across the rings in this view, taken on Jan. 19, 2007, in contrast to what Cassini saw when it arrived in 2004 (see PIA05429).

The view is a mosaic of 36 images -- that is, 12 separate sets of red, green and blue images -- taken over the course of about 2.5 hours, as Cassini scanned across the entire main ring system.

This view looks toward the unlit side of the rings from about 40 degrees above the ring plane.

The images in this natural-color view were obtained with the Cassini spacecraft wide-angle camera at a distance of approximately 1.23 million kilometers (764,000 miles) from Saturn. Image scale is 70 kilometers (44 miles) per pixel.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo.

For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov/home/index.cfm. The Cassini imaging team homepage is at http://ciclops.org.
I'm sure someone here will still be bitching about Cassini having plutonium onboard and all the damage it could do if the launch had failed.
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Post by Lalanae »

Awesome! Thanks for sharing! My Dad (former NASA engineer and all-around space nerd) will have a geekgasm when I send him the link.

Its pretty amazing how far we've come. Stuff like this seems almost unreal.
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Post by Nick »

A little off topic but -

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I've been watching the Lunar Eclipse all night. It's amazing 8)
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Post by Winnow »

Nice Nick! We don't get a good view of it on the West Coast in the U.S. this time.

Somewhere I have pictures I took of the 1979 Solar Eclipse. They show the eclipse displayed on a plate through my new telescope (at the time) which was pointing at the Sun. At the time, my dad told me it was a big deal as the last total solar eclipse visible in the U.S. was in 1954 and the next one isn't until 2017.

I just found this on another website:
Mercury

Mercury peeks above the Eastern horizon for a few days during the middle of March. On the morning of March 15th, look for the tiny planet along with Mars, Neptune and the Moon right at sunrise.

Venus

Venus shines brightly in the West all during the month of March. Its bright light makes it very easy to spot every evening this month. On the evening of March 21st, look for Venus along with the constellations Taurus and Orion just after the Sun goes down.

Mars

The red planet will be visible in the East every March morning. On the morning of March 15th, you can see Mars, along with Mercury and Neptune in the East just before the Sun comes up.

Jupiter

The largest planet in our solar system shines brightly in the East every morning this month. Jupiter is very bright, so it is very easy to spot. On the morning of March 12th, look for Jupiter, the Moon and the constellation Scorpius in the Southern morning sky.

Saturn

Saturn is visible in the Eastern sky every evening this month. The ringed plant is visible as soon as the Sun sets. On the evening of March 1st, look for Saturn close to the Moon and the constellation Leo right after sunset.

Uranus

Uranus will be hidden from us this month.

Neptune

Neptune is shown on our map for the March 15th, but it is very dim and usually requires a telescope to see it.

Pluto (a dwarf planet)

Pluto be very hard for us to see this month.
I'm OK with Uranus being hidden!
Due to the poisonous gases that exist, Man can not survive anywhere near URANUS
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Post by Nick »

I really have never seen anything like that eclipse tonight.

The whole moon was shimmering with weird red light, it looked completely spherical instead of the usual white flat circle and it was pulsing really dramatically for nearly an hour.

I never realised it was so close to the Earth, you got a great level of depth perception tonight.

Also, with the reflective light of the moon being nullified, there were a countless number of shooting stars, more than I've ever seen before. You could also see weird aurora type waves on the atmosphere, which came and went (whilst faint were still obvious to the naked eye).

One of the most spectacular night skies I have ever seen. Great viewing! Fortunately we had absolutely perfect conditions for viewing it. So lucky!

I'd give my right cochlea for a chance at seeing a full blown Solar Eclipse. It's always been a dream to see one of those from a great vantage point.

I'm still all excited :D
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Post by Dregor Thule »

Lalanae wrote:Its pretty amazing how far we've come. Stuff like this seems almost unreal.
While amazing, it's frustrating that we could have progressed a lot more than we have in this time.
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Post by Winnow »

More news for the planetary science crowd!

http://www.nasa.gov/mission_pages/mars/ ... 70315.html
03.15.07

Pasadena, Calif. -- New measurements of Mars' south polar region indicate extensive frozen water. The polar region contains enough frozen water to cover the whole planet in a liquid layer approximately 11 meters (36 feet) deep. A joint NASA-Italian Space Agency instrument on the European Space Agency's Mars Express spacecraft provided these data.

This new estimate comes from mapping the thickness of the ice. The Mars Express orbiter's radar instrument has made more than 300 virtual slices through layered deposits covering the pole to map the ice. The radar sees through icy layers to the lower boundary, which is as deep as 3.7 kilometers (2.3 miles) below the surface.
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Post by Deward »

I can remember seeing the solar eclipse when I was in 6th grade, 1984 I think. We made the little boxes because we didn't want to go blind looking at it. :)
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Post by Winnow »

Even more cool news from Mars:

http://news.bbc.co.uk/2/hi/science/nature/6461201.stm
'Cave entrances' spotted on Mars

By Paul Rincon

Science reporter, BBC News, Houston

South polar region of Mars

Nasa release on the topography of the south polar region of Mars
Scientists studying pictures from Nasa's Odyssey spacecraft have spotted what they think may be seven caves on the surface of Mars.

The candidate caves are on the flanks of the Arsia Mons volcano and are of sufficient depth their floors mostly cannot be seen through the opening.

Details were presented here at the Lunar and Planetary Science Conference in Houston, Texas.

Temperature data from Mars Odyssey's Themis instrument support the idea.

The authors say that the possible discovery of caves on the Red Planet is significant.

The caves may be the only natural structures capable of protecting primitive life forms from micrometeoroids, UV radiation, solar flares and high energy particles that bombard the planet's surface.

The spacecraft spotted what seemed to be vertical "skylight" entrances to caves below the surface.

There is a sheer drop of between about 80m and 130m or more to the cave floors below.

'Seven sisters'

During the day, one of the features - nicknamed "Annie" - is warmer than surrounding pits and cooler than sunlit areas.

Night time temperatures are warmer than nearly all surrounding areas.

Co-author Glen Cushing, from the US Geological Survey in Flagstaff, Arizona, said this was exactly what would be expected if the feature were a cave.

"Nothing like these features has been seen elsewhere on Mars," he told BBC News.

The researchers describe the candidate caves as "seven sisters" and have given them all names: Dena, Chloe, Wendy, Annie, Abbey, Nicki and Jeanne.

The cave entrances are between 100m and 252m wide (330-828ft).

Because in most cases the cave floors cannot be seen, only minimum depths are known: the researchers calculated they must extend between 73m and 96m (240-315ft) below the surface.

However, in one image taken of Dena by the Mars Odyssey Camera, a floor can be seen.

Using the data, the authors calculated that this cave must extend 130m (426ft) below the surface.

Mars Odyssey was launched in April 2001 to hunt for past or present water on the Red Planet.

Its Themis (Thermal Emission Imaging System) instrument uses the visible and infrared part of the electromagnetic spectrum to measure the temperature properties of the Martian surface.
This interactive panorama view of Mars is cool too:

http://www.fotoausflug.de/en-mars.html
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Post by Arborealus »

Add all the Ice found at the Southern Pole...which is fairly important news as well...

Planetary science is rock 'n' roll right now...

http://news.yahoo.com/s/nm/20070315/sc_ ... water_dc_2
WASHINGTON (Reuters) - A spacecraft orbiting Mars has scanned huge deposits of water ice at its south pole so plentiful they would blanket the planet in 36 feet of water if they were liquid, scientists said on Thursday.
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Post by Winnow »

Arborealus wrote:Add all the Ice found at the Southern Pole...which is fairly important news as well...

Planetary science is rock 'n' roll right now...

http://news.yahoo.com/s/nm/20070315/sc_ ... water_dc_2
WASHINGTON (Reuters) - A spacecraft orbiting Mars has scanned huge deposits of water ice at its south pole so plentiful they would blanket the planet in 36 feet of water if they were liquid, scientists said on Thursday.
Look three posts above yours for that news! : )

Looks like we're learning from our mistakes and making better probes and calculations : )

Some of the best money spent by our government!
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Post by Arborealus »

Winnow wrote:
Arborealus wrote:Add all the Ice found at the Southern Pole...which is fairly important news as well...

Planetary science is rock 'n' roll right now...

http://news.yahoo.com/s/nm/20070315/sc_ ... water_dc_2
WASHINGTON (Reuters) - A spacecraft orbiting Mars has scanned huge deposits of water ice at its south pole so plentiful they would blanket the planet in 36 feet of water if they were liquid, scientists said on Thursday.
Look three posts above yours for that news! : )

Looks like we're learning from our mistakes and making better probes and calculations : )

Some of the best money spent by our government!
My bad...:/...I swear I read the entire thread...just missed that one...Thought it odd that you hadn't mentioned it...lol
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Post by *~*stragi*~* »

looks fake
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Post by Winnow »

Hex cloud shapes = strange

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http://www.space.com/scienceastronomy/0 ... n_hex.html
One of the most bizarre weather patterns known has been photographed at Saturn, where astronomers have spotted a huge, six-sided feature circling the north pole.

Rather than the normally sinuous cloud structures seen on all planets that have atmospheres, this thing is a hexagon.

The honeycomb-like feature has been seen before. NASA's Voyager 1 and 2 spacecraft imaged it more than two decades ago. Now, having spotted it with the Cassini spacecraft, scientists conclude it is a long-lasting oddity.

"This is a very strange feature, lying in a precise geometric fashion with six nearly equally straight sides," said Kevin Baines, atmospheric expert and member of Cassini's visual and infrared mapping spectrometer team at NASA's Jet Propulsion Laboratory, Pasadena, Calif. "We've never seen anything like this on any other planet. Indeed, Saturn's thick atmosphere, where circularly-shaped waves and convective cells dominate, is perhaps the last place you'd expect to see such a six-sided geometric figure, yet there it is."

The hexagon is nearly 15,000 miles (25,000 kilometers) across. Nearly four Earths could fit inside it. The thermal imagery shows the hexagon extends about 60 miles (100 kilometers) down into the clouds.

At Saturn's south pole, Cassini recently spotted a freaky human eye-like feature that resembles a hurricane.

"It's amazing to see such striking differences on opposite ends of Saturn's poles," said Bob Brown, team leader of the Cassini visual and infrared mapping spectrometer at the University of Arizona. "At the south pole we have what appears to be a hurricane with a giant eye, and at the north pole of Saturn we have this geometric feature, which is completely different."

The hexagon appears to have remained fixed with Saturn's rotation rate and axis since first glimpsed by Voyager 26 years ago. The actual rotation rate of Saturn is still uncertain, which means nobody knows exactly how long the planet's day is.

"Once we understand its dynamical nature, this long-lived, deep-seated polar hexagon may give us a clue to the true rotation rate of the deep atmosphere and perhaps the interior," Baines said.
Video of it:

http://www.space.com/php/video/player.p ... rn_hexagon
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Post by Arborealus »

That is gonna be one hell of a puzzle for some fluid dynamics folks...Maybe it is definitive proof of the existence of God...or Pythagorus...
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Post by Boogahz »

Arborealus wrote:That is gonna be one hell of a puzzle for some fluid dynamics folks...Maybe it is definitive proof of the existence of God...or Pythagorus...
That's what the real Death Star looks like...
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Post by Al »

I've seen patterns like that arise when we make our glaze batches at work. They are seldom persistant, so I doubt it's related, but I know these shapes can arise in fluids because I see it several time a week. My theory is that it is tidal forces from the various sattelites causing the odd shape, but then again, it would seem that would have an effect on the rings as well... Hrm, I guess it would also seem that this should be present on Jupiter, where tidal forces are much more prevalent. Oh well...
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