美国宇航局卡西尼号飞船发回土卫四与Rhea 最新照片

Photo Source: NASA / JPL / SSI's

NASA's Cassini spacecraft to image October 17, 2010 Saturn's moons Dione and Rhea on the two wide-angle

Photo Source: NASA / JPL / SSI's

NASA's Cassini spacecraft captured images of a Pallene small, four-kilometer-wide (3 miles range) of the moon, in front of the planet Saturn.

Photo Source: NASA / JPL / SSI's

NASA's Cassini spacecraft obtained the moon, Mimas October 16, 2010 the original image, in the shadow of Mimas Saturn back into the

Photo Source: NASA / JPL / SSI's

NASA's Cassini spacecraft took place, October 14, 2010 Titan Saturn on the original image to start a sporty long weekend, taking the spacecraft eight other satellites

To a long weekend road trip, NASA's Cassini spacecraft successfully glide nearly nine satellites of Saturn, sent back as a souvenir of their adventure adrenaline stimulation of the original image stream. The spacecraft sent back particularly intriguing images of the moons Dione and Rhea. The spacecraft sent back the satellite Dione and Rhea particularly interesting image.

The Dione and Rhea pictures are the highest-resolution views yet of parts of their surfaces. Dione and Rhea picture, however, the surface of some of the highest-resolution observations. The views of the southern part of Dione's leading hemisphere (the part of the moon that faces forward in its orbit around Saturn) and the equatorial region of Rhea's leading hemisphere are more detailed than the last time we saw these terrains with NASA's Voyager spacecraft in the early 1980s. on Dione's leading hemisphere (facing the moon in its orbit around Saturn part) and Rhea's leading hemisphere south of the equator than the last time we saw the view of NASA's Voyager spacecraft in the topographic detail early 80s.

Of the five big icy moons of Saturn, Dione and Rhea are often considered a pair because they orbit close to each other, are darker than the others, and exhibit similar patterns of light reflecting off them. Saturn Five, and Dione Rhea on the big ice is generally considered a pair as they orbit close to each other, are darker than others, and showed a similar pattern, the light they reflect. These new images, however, highlight the differences between these sister moons. These new pictures, but these sisters striking difference between the satellite.

Both images show similar geographic regions on each satellite. The two satellite images show similar in each geographic region. However, scientists can identify differences in geological histories of the two bodies from differences in the numbers and sizes of visible craters on their surfaces. However, scientists can identify the two bodies between the number of geologic history and volcanic visible on its surface differences in population size. The number and size of craters on a body's surface help indicate the age of that surface - the more craters there are and the larger they are, the older the surface is. The number and physical surface of the crater the size of that help, Surface Age - craters are more and more of them, the older the surface.

Rhea, for example, shows ancient, intense bombardments throughout this region. Rhea, for example, shows the region of ancient, intense bombing. However, the same region of Dione is divided into distinct areas that exhibit variations in the number and size of preserved craters. However, Dione same region is divided into different regions, the number and size of the crater in the display changes saved. In particular, while parts of Dione are heavily cratered like Rhea, there are other areas covered by relatively smooth plains. In particular, while large parts like Rhea, Dione pit, a relatively flat plain is covered by other areas. Those areas have many small craters, but few large impact scars, which indicates that they are geologically younger than the heavily cratered areas. The area has many small craters, but few have a major impact of the wounds, suggesting that they are extremely Geology cratered regions are relatively young. The smooth plains must have been resurfaced at some point in Dione's past - an event that seems to be missing from Rhea's geological history on this side of the moon. In the flatness of the plains must have been some resurfacing Dione of the past that - an event, it seems from this side of the moon Rhea geological history missing.

Images of the moon Mimas, captured just before it went into shadow behind Saturn, will be compared to thermal maps made earlier this year that showed an unexpected "Pac-Man" heat pattern. Moon Mimas images captured before the people behind the shadow of Saturn, will be displayed on the map than the heat earlier this year, an unexpected "elf" heat pattern

(See http://www.nasa.gov/mission_pages/cassini/whycassini/cassini20100329.html for more details.) (See http://www.nasa.gov/mission_pages/cassini/whycassini/cassini20100329.html more details.)

Cassini also caught a picture of the tiny, 4-kilometer-wide (3-mile-wide) moon Pallene, in front of the planet Saturn, which is more than 120,000 kilometers (75,000 miles) wide at its equator. Cassini also caught a small, 4-kilometer-wide (3 miles wide) moon Pallene pictures of Saturn, which is over 120,000 km wide at its equator (75,000 miles) of the front.

Cassini's elliptical orbital pattern around Saturn means it can target moons for flybys about once or twice a month. Cassini's oval-shaped orbit around Saturn model means that it can fly about once a month for one or two satellites. The flybys on this particular Cassini road trip were "non-targeted" flybys, meaning navigators did not refine Cassini's path to fly over particular points on each moon. In this particular road trip, Cassini flew over the "non-target" fly, which means that there is no improvement on the number of Air Haikaxini path, over the moon for each specific point.

Cassini's long weekend started on Thursday, Oct. 14, at 5:07 pm UTC (9:07 am PDT), when it passed by Saturn's largest moon Titan at an altitude of 172,368 kilometers (107,104 miles) above the surface. Cassini No long weekend, Thursday, Oct. 14, at 17:07 UTC the beginning (9:07 seconds), when it is Saturn's largest moon Titan by a 172,368 km above the surface (one hundred and seven one hundred and four miles) in height. Then came a whirlwind 21 hours in which Cassini flew by Polydeuces at 116,526 kilometers (72,406 miles), Mimas at 69,950 kilometers (43,465 miles), Pallene at 36,118 kilometers (22,443 miles), Telesto at 48,455 kilometers (30,109 miles), Methone at 105,868 kilometers (65,783 miles), Aegaeon at 96,754 kilometers (60,120 miles) and Dione at 31,710 kilometers (19,704 miles). Then came the whirlwind twenty-one hours in which Cassini flew Pallene 四日 one hundred and sixteen thousand five hundred hundred and sixteen kilometers (seventy-two thousand four hundred and six miles), Mimas in 六九 九五 ○ km (forty-three thousand four hundred sixty-five miles), Titan on the 30th forty-eight thousand four hundred fifty-five kilometers (thirty thousand zero one hundred and nine miles), Methone in the 36,118 km (22,443 miles), Titan on the 13th 105,868 km (sixty-five thousand seven hundred eighty-three miles), Aegaeon in 96,754 km (六万 ○ 一百 二 miles) and 31,710 kilometers (19,704 miles) dione. Cassini's last visit - Rhea at 38,752 kilometers (24,079 miles) - took place at 6:47 am UTC on Oct. 17 (10:47 pm PDT on Oct. 16). Cassini's last visit - Rhea In thirty-eight thousand seven hundred fifty-two km (twenty-four thousand and seventy-nine miles) - 06 points in the morning 47 10 17 (16 October 10:47 pm GMT) UTC time.

Scientists decided in advance which observations they wanted to make while the spacecraft was cruising past all the moons. Decided to advance the views of scientists who want to make the spacecraft, while cruising past all of the satellite. They chose to obtain images of Titan, Mimas, Pallene, Dione and Rhea. They chose to get the Titan, Mimas, Pallene, Dione and Rhea images. They also obtained thermal scans of Mimas, Dione and Rhea. They also won the Mimas, Dione and Rhea thermal scanning.

For more raw images, visit: http://saturn.jpl.nasa.gov/photos/raw/. More RAW images, please visit: http://saturn.jpl.nasa.gov/photos/raw/.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. Cassini-Huygens mission is NASA, the European Space Agency and the Italian Space Agency cooperation projects. The Jet Propulsion Laboratory manages the project for NASA's Science Mission Directorate in Washington. Jet Propulsion Laboratory, managed for NASA's Science Mission Directorate in Washington project. The Cassini orbiter was designed, developed and assembled at JPL. Cassini orbiter design, development and assembly of the Jet Propulsion Laboratory. The imaging operations center is based at the Space Science Institute in Boulder, Colo. More Cassini information is available, at http://www.nasa.gov/cassini and http://saturn.jpl.nasa.gov. Image Processing Center Spatial Information Science Institute in Boulder, Colorado, more Duokaxini number is available, in http://www.nasa.gov/cassini and http://saturn.jpl.nasa.gov.