“惠更斯”号登陆土卫六直播专题！（hot！）

呵呵！这是本版的第三个精华贴。

祝贺！！！

Composite of Titan's Surface Seen During Descent
January 15, 2005         Full-Res: PIA07230

This composite was produced from images returned yesterday, January 14, 2005, by the European Space Agency's Huygens probe during its successful descent to land on Titan. It shows a full 360-degree view around Huygens. The left-hand side, behind Huygens, shows a boundary between light and dark areas. The white streaks seen near this boundary could be ground 'fog,' as they were not immediately visible from higher altitudes.

As the probe descended, it drifted over a plateau (center of image) and was heading towards its landing site in a dark area (right). From the drift of the probe, the wind speed has been estimated at around 6-7 kilometers (about 4 miles) per hour.

These images were taken from an altitude of about 8 kilometers ( about 5 miles) with a resolution of about 20 meters (about 65 feet) per pixel. The images were taken by the Descent Imager/Spectral Radiometer, one of two NASA instruments on the probe. 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 Cassini-Huygens 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 Descent Imager/Spectral team is based at the University of Arizona, Tucson, Ariz.

For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov/home/index.cfm .

Credit: ESA/NASA/Univ. of Arizona

First Color View of Titan's Surface
January 15, 2005         Full-Res: PIA07232

This image was returned yesterday, January 14, 2005, by the European Space Agency's Huygens probe during its successful descent to land on Titan. This is the colored view, following processing to add reflection spectra data, and gives a better indication of the actual color of the surface.

Initially thought to be rocks or ice blocks, they are more pebble-sized. The two rock-like objects just below the middle of the image are about 15 centimeters (about 6 inches) (left) and 4 centimeters (about 1.5 inches) (center) across respectively, at a distance of about 85 centimeters (about 33 inches) from Huygens. The surface is darker than originally expected, consisting of a mixture of water and hydrocarbon ice. There is also evidence of erosion at the base of these objects, indicating possible fluvial activity. The image was taken with the Descent Imager/Spectral Radiometer, one of two NASA instruments on the probe.

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 Cassini-Huygens 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 Descent Imager/Spectral team is based at the University of Arizona, Tucson, Ariz.

For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov/home/index.cfm .

Credit: ESA/NASA/Univ. of Arizona

15 January 2005
Audio data collected by the Huygens Atmospheric Structure Instrument (HASI), which includes an acoustic sensor, during Huygens' descent, 14 January 2005.


1. Speeding through Titan's haze
This recording is a laboratory reconstruction of the sounds heard by Huygens' microphones. Several sound samples, taken at different times during the descent, are here combined together and give a realistic reproduction of what a traveller on board Huygens would have heard during one minute of the descent through Titan's atmosphere.
（在泰坦的迷雾中加速下降的声音）
http://esamultimedia.esa.int/images/huygens_alien_winds_descent.mp3

2. Radar echos from Titan's surface
This recording was produced by converting into audible sounds some of the radar echoes received by Huygens during the last few kilometres of its descent onto Titan. As the probe approaches the ground, both the pitch and intensity increase. Scientists will use intensity of the echoes to speculate about the nature of the surface.
（下降过程中雷达回波的声音）
http://esamultimedia.esa.int/images/huygens_alien_winds_descent_radar.mp3

[quote:3899cbc60b="lin-j-k"]呵呵！这是本版的第三个精华贴。[/quote]

请问前两个是什么？

[quote:2b4025a5b0="macross11"]15 January 2005
Audio data collected by the Huygens Atmospheric Structure Instrument (HASI), which includes an acoustic sensor, during Huygens' descent, 14 January 2005.


1. Speeding through Titan's haze
This recording is a laboratory reconstruction of the sounds heard by Huygens' microphones. Several sound samples, taken at different times during the descent, are here combined together and give a realistic reproduction of what a traveller on board Huygens would have heard during one minute of the descent through Titan's atmosphere.
（在泰坦的迷雾中加速下降的声音）
http://esamultimedia.esa.int/images/huygens_alien_winds_descent.mp3

2. Radar echos from Titan's surface
This recording was produced by converting into audible sounds some of the radar echoes received by Huygens during the last few kilometres of its descent onto Titan. As the probe approaches the ground, both the pitch and intensity increase. Scientists will use intensity of the echoes to speculate about the nature of the surface.
（下降过程中雷达回波的声音）
http://esamultimedia.esa.int/images/huygens_alien_winds_descent_radar.mp3[/quote]

不错！第一个象是泰坦上有人骑摩托的声音。。
第2个象是泰坦上的火车声。。

这是两个精华的连接：http://www.astronomy.com.cn/bbs/viewtopic.php?t=32544http://www.astronomy.com.cn/bbs/viewtopic.php?t=32689

我查看了本版的老贴，还有本版杨睿版主加的另一精华贴，现在就是有四个精华贴了。

Titan Descent
January 17, 2005          

This picture is a composite of 30 images from ESA's Huygens probe. They were taken from an altitude varying from 13 kilometers down to 8 kilometers when the probe was descending towards its landing site.

The images have a resolution of about 20 meters per pixel and cover an area extending out to 30 kilometers.

Credit: ESA/NASA/University of Arizona

这个应该是在下降过程中拍的吧。。

:shock: 就是的。

顶！！！

那时在备考,错过好戏了~ :|

那就不要错过今年7月4日的撞击彗星的好戏！ 8)

呵呵，期待。。。

让我们拭目以待!
希望有爱好者能拍下这一撞击~

7月份！可能又是考试期间 :wink:

期待到时能看直播