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Fitxategi:Mars duststorm.jpg

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Two dramatically different faces of our Red Planet neighbor appear in these comparison images showing how a global dust storm engulfed Mars with the onset of Martian spring in the Southern Hemisphere. When NASA's Hubble Space Telescope imaged Mars in June, the seeds of the storm were caught brewing in the giant Hellas Basin (oval at 4 o'clock position on disk) and in another storm at the northern polar cap.

When Hubble photographed Mars in early September, the storm had already been raging across the planet for nearly two months obscuring all surface features. The fine airborne dust blocks a significant amount of sunlight from reaching the Martian surface. Because the airborne dust is absorbing this sunlight, it heats the upper atmosphere. Seasonal global Mars dust storms have been observed from telescopes for over a century, but this is the biggest storm ever seen in the past several decades.

Mars looks gibbous in the right photograph because is it 26 million miles farther from Earth than in the left photo (though the pictures have been scaled to the same angular size), and our viewing angle has changed. The left picture was taken when Mars was near its closest approach to Earth for 2001 (an event called opposition); at that point the disk of Mars was fully illuminated as seen from Earth because Mars was exactly opposite the Sun.

Both images are in natural color, taken with Hubble's Wide Field Planetary Camera 2.
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Jatorria http://hubblesite.org/newscenter/archive/releases/2001/31/image/a/
Egilea NASA

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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11 urria 2001

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Fitxategiaren historia

Data/orduan klik egin fitxategiak orduan zuen itxura ikusteko.

Data/OrduaIruditxoaNeurriakErabiltzaileaIruzkina
oraingoa08:31, 24 uztaila 201808:31, 24 uztaila 2018 bertsioaren iruditxoa2.844 × 1.701 (285 KB)Jcpag2010-
05:47, 26 otsaila 201505:47, 26 otsaila 2015 bertsioaren iruditxoa2.727 × 1.462 (964 KB)Jcpag2012higher resolution (cropped version)
14:14, 18 ekaina 200514:14, 18 ekaina 2005 bertsioaren iruditxoa800 × 476 (29 KB)KokooMars dust storm {{PD-USGov-NASA}}

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