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Colorful Colossi and Changing Hues
#1
[تصویر:  13463514431.jpg]



A giant of a moon appears before a giant of a planet undergoing seasonal
changes in this natural color view of Titan and Saturn from NASA's
Cassini spacecraft.

Titan, Saturn's largest moon, measures
3,200 miles, or 5,150 kilometers, across and is larger than the planet
Mercury. Cassini scientists have been watching the moon's south pole
since a vortex appeared in its atmosphere in 2012. See PIA14919 and
PIA14920 to learn more about this mass of swirling gas around the pole
in the atmosphere of the moon.

As the seasons have changed in
the Saturnian system, and spring has come to the north and autumn to the
south, the azure blue in the northern Saturnian hemisphere that greeted
Cassini upon its arrival in 2004 is now fading. The southern
hemisphere, in its approach to winter, is taking on a bluish hue. This
change is likely due to the reduced intensity of ultraviolet light and
the haze it produces in the hemisphere approaching winter, and the
increasing intensity of ultraviolet light and haze production in the
hemisphere approaching summer. (The presence of the ring shadow in the
winter hemisphere enhances this effect.) The reduction of haze and the
consequent clearing of the atmosphere makes for a bluish hue: the
increased opportunity for direct scattering of sunlight by the molecules
in the air makes the sky blue, as on Earth. The presence of methane,
which generally absorbs in the red part of the spectrum, in a now
clearer atmosphere also enhances the blue.

This view looks toward the northern, sunlit side of the rings from just above the ring plane.


This mosaic combines six images -- two each of red, green and blue
spectral filters -- to create this natural color view. The images were
obtained with the Cassini spacecraft wide-angle camera on May 6, 2012,
at a distance of approximately 483,000 miles (778,000 kilometers) from
Titan. Image scale is 29 miles (46 kilometers) per pixel on Titan.


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.
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 سپاس شده توسط crux
#2
http://beta.mokhsone.tk
بلخره اومدم :|
دلتون واسم تنگ شده بود
عخییییی d:
پاسخ
#3
دوستان نظری در مورد اینجور پستا ک براتون میذارم ندارین ؟

انتقادی ، پیشنهادی اگه داشته باشید استقبال میکنم
ممنون
در مورد اظهار نظر آقایون در تاپیک دلخوری باید بگم:
آقایون: کم گوی و گزیده گوی چون در// تا ز اندک تو جهان شود پر!!!
هرچند ک کلام گوهر بار از زبان شما جاری نشده، نمیشود و نخواهد شد!!!
پاسخ


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