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Collection:
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NASA Astronomy Picture of the Day Collection
Collection
NASA Astronomy Picture of the Day Collection
Collection
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Title:
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Aeolian Mars
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Explanation:
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Mars' [ http://mars.ivv.nas…mars_earth_comp_NSSD C_and.html ]atmosphere is relatively thin, still when martian winds [ http://antwrp.gsfc.…] blow they weather [ http://learn.jpl.na…] and shape its surface [ http://www.msss.com…]. Like familiar aeolian [ http://darkwing.uor…] features on Earth [ http://ruidoso.net/…], this field of dunes within Mars' Rabe crater exhibits graceful undulating ridges [ http://photo.net/ph…] which can shift as windblown material is deposited on the dunes' windward face and falls away down the steeper leeward slopes. Indicated by the arrow, the dark trails are signs that the martian [ http://amor.rz.hu-b…] sand has avalanched down the steep slopes in the recent past. Rippling patterns of smaller dunes are also visible in this sharp high-resolution view [ http://www.msss.com…rabe_dunes/index.htm l ] along with criss-crossing dark trails which may be evidence of local dust-devil [ http://www.msss.com…moc2_171/index.html ] windstorms. The image is about 3 kilometers across and was recorded in March of 1999 by the orbiting Mars [ http://www.msss.com…] Global Surveyor spacecraft.
Explanation
Mars' [ http://mars.ivv.nas…mars_earth_comp_NSSD C_and.html ]atmosphere is relatively thin, still when martian winds [ http://antwrp.gsfc.…] blow they weather [ http://learn.jpl.na…] and shape its surface [ http://www.msss.com…]. Like familiar aeolian [ http://darkwing.uor…] features on Earth [ http://ruidoso.net/…], this field of dunes within Mars' Rabe crater exhibits graceful undulating ridges [ http://photo.net/ph…] which can shift as windblown material is deposited on the dunes' windward face and falls away down the steeper leeward slopes. Indicated by the arrow, the dark trails are signs that the martian [ http://amor.rz.hu-b…] sand has avalanched down the steep slopes in the recent past. Rippling patterns of smaller dunes are also visible in this sharp high-resolution view [ http://www.msss.com…rabe_dunes/index.htm l ] along with criss-crossing dark trails which may be evidence of local dust-devil [ http://www.msss.com…moc2_171/index.html ] windstorms. The image is about 3 kilometers across and was recorded in March of 1999 by the orbiting Mars [ http://www.msss.com…] Global Surveyor spacecraft. Explanation
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Credit and Copyright:
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Credit_and_Copyright
Credit and Copyright
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keyword:
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mars
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keyword:
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dunes
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keyword:
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wind
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facet_when:
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1999
facet_when
1999
facet_when
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facet_where:
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Mars
facet_where
Mars
facet_where
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facet_where:
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Berlin
facet_where
Berlin
facet_where
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facet_where:
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Goddard Space Flight Center (GSFC)
facet_where
Goddard Space Flight Center (GSFC)
facet_where
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facet_where:
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Jet Propulsion Laboratory (JPL)
facet_where
Jet Propulsion Laboratory (JPL)
facet_where
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facet_what:
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Earth
facet_what
Earth
facet_what
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facet_what:
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Mars
facet_what
Mars
facet_what
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facet_what:
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Surveyor
facet_what
Surveyor
facet_what
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facet_what:
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Crater
facet_what
Crater
facet_what
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facet_what:
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Mars Global Surveyor Orbiter (MGS)
facet_what
Mars Global Surveyor Orbiter (MGS)
facet_what
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facet_when_year:
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1999
facet_when_year
1999
facet_when_year
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original url:
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original_url
original url
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UID:
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SPD-APOD-ap000202
UID
SPD-APOD-ap000202
UID
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