Difference between revisions of "Milankovic Crater"

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[[File:Mapmilankovic.jpg  | Map showing the location of Milankovic Crater]]
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                                            Map showing the location of Milankovic Crater
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Milankovič is a impact crater in the [[Diacria quadrangle]].  It has a diameter of 118.4 km and is located at 54.7° north latitude and 146.7° west longitude (213.3 E). The crater is easy to see on Mars photographs because it lies north of [[Olympus Mons]] and sits by itself in the flat plain in the North.
 
Milankovič is a impact crater in the [[Diacria quadrangle]].  It has a diameter of 118.4 km and is located at 54.7° north latitude and 146.7° west longitude (213.3 E). The crater is easy to see on Mars photographs because it lies north of [[Olympus Mons]] and sits by itself in the flat plain in the North.
 
It is named after Milutin Milanković (1879–1958), a Serbian geophysicist and astrophysicist.<ref>http://wwwflag.wr.usgs.gov/USGSFlag/Space/nomen/mars/marscrat.html https://web.archive.org/web/20020208134249/http://wwwflag.wr.usgs.gov/USGSFlag/Space/nomen/mars/marscrat.html |</ref>  There is also an asteroid and a crater on the moon named after Milutin Milanković.  Milanković Crater is the setting of the short story King of Mars, part of the Mars Mars 2194 by Canadian author Jack Stornoway.
 
It is named after Milutin Milanković (1879–1958), a Serbian geophysicist and astrophysicist.<ref>http://wwwflag.wr.usgs.gov/USGSFlag/Space/nomen/mars/marscrat.html https://web.archive.org/web/20020208134249/http://wwwflag.wr.usgs.gov/USGSFlag/Space/nomen/mars/marscrat.html |</ref>  There is also an asteroid and a crater on the moon named after Milutin Milanković.  Milanković Crater is the setting of the short story King of Mars, part of the Mars Mars 2194 by Canadian author Jack Stornoway.
<gallery class="center" widths="190px" heights="180px" >
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Mapmilankovic.jpg|Map showing the location of Milankovic Crater
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<gallery class="center" widths="380px" heights="360px">
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Wikimilankovic.jpg|Milankovič Crater, as seen by CTX camera on [[Mars Reconnaissance Orbiter]].
 
Wikimilankovic.jpg|Milankovič Crater, as seen by CTX camera on [[Mars Reconnaissance Orbiter]].
 
Wikimilankovicdunes.jpg|Milankovič Crater, as seen by CTX camera on Mars Reconnaissance Orbiter. Dark dots in center are dunes.
 
Wikimilankovicdunes.jpg|Milankovič Crater, as seen by CTX camera on Mars Reconnaissance Orbiter. Dark dots in center are dunes.
Image:ESP_024943straightvalleysboxed.jpg|Depressions with straight southern walls, as seen by HiRISE under [[HiWish program]]. Box indicates part enlarged in images below. Image location is in Milankovič crater in [[Diacria quadrangle]].
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Image:24943straightedgeshadows.jpg|Enlargement of above image of straight walled depression, as seen by HiRISE under HiWish program. Note that the southern wall is dark compared to the northern wall.
 
Image:24943straightedgeshawodsclose.jpg|Further enlargement of above image, as seen by HiRISE under HiWish program.
 
 
</gallery>
 
</gallery>
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==Depressions in Milankovic Crater==
 
==Depressions in Milankovic Crater==
  
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[[File:ESP 024943straightvalleysboxed.jpg|thumb|300px|left|Depressions with straight southern walls, as seen by HiRISE under HiWish program.  Box indicates part enlarged in images below.]]
 
[[File:ESP 024943straightvalleysboxed.jpg|thumb|300px|left|Depressions with straight southern walls, as seen by HiRISE under HiWish program.  Box indicates part enlarged in images below.]]
[[File:24943straightedgeshadows.jpg|thumb|300px|center||Enlargement of above image of straight walled depression  Note that the southern wall is dark compared to the northern wall.]]
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[[File:24943straightedgeshawodsclose.jpg|thumb|300px|right|Further enlargement of above image]]
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[[File:24943straightedgeshadows.jpg|thumb|300px|left||Enlargement of above image of straight walled depression  Note that the southern wall is dark compared to the northern wall.]]
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The following images are ones referred to in this study of subsurface ice sheets.<ref>Supplementary Materials Exposed subsurface ice sheets in the Martian mid-latitudes Colin M. Dundas, Ali M. Bramson, Lujendra Ojha, James J. Wray, Michael T. Mellon, Shane Byrne, Alfred S. McEwen, Nathaniel E. Putzig, Donna Viola, Sarah Sutton, Erin Clark, John W. Holt</ref>
 
The following images are ones referred to in this study of subsurface ice sheets.<ref>Supplementary Materials Exposed subsurface ice sheets in the Martian mid-latitudes Colin M. Dundas, Ali M. Bramson, Lujendra Ojha, James J. Wray, Michael T. Mellon, Shane Byrne, Alfred S. McEwen, Nathaniel E. Putzig, Donna Viola, Sarah Sutton, Erin Clark, John W. Holt</ref>
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<gallery class="center"  widths="380px" heights="360px">
 
<gallery class="center"  widths="380px" heights="360px">
 
File:ESP 045290 2350icelayers.jpg|Wide view of part of Milankovic Crater  Many depressions here contain ice in their walls.
 
File:ESP 045290 2350icelayers.jpg|Wide view of part of Milankovic Crater  Many depressions here contain ice in their walls.
 
File:ESP 045290 2350icelayersscale.jpg|Close view from a previous image  The triangular shape of some depressions are noted.  The area in the box is enlarged in following images.
 
File:ESP 045290 2350icelayersscale.jpg|Close view from a previous image  The triangular shape of some depressions are noted.  The area in the box is enlarged in following images.
 
File:45290 2350icelayerscloseer.jpg |Close view of depression  Arrows indicate where there is a very thin, 1-2 meter covering on what is believed to be ice.
 
File:45290 2350icelayerscloseer.jpg |Close view of depression  Arrows indicate where there is a very thin, 1-2 meter covering on what is believed to be ice.
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</gallery>
 
</gallery>
<gallery class="center" widths="190px" heights="180px" >
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ESP 045290 2350icelayers.jpg|Wide view of part of  Milankovic Crater, as seen by HiRISE under HiWish program  Many depressions here contain ice in their walls.
 
45290 2350icelayerscloseppolygons.jpg|Close view of part of  Milankovic Crater, as seen by HiRISE under HiWish program  This was one of the places were ice is especially evident.  Image taken with HiRISE under HiWish program.
 
ESP 045290 2350icelayersscale.jpg|Close view from a previous image, as seen by HiRISE under HiWish program  The triangular shape of some depressions are noted.  The area in the box is enlarged in following images.
 
45290 2350icelayersclose.jpg|Close view of depression, as seen by HiRISE under HiWish program  Straight, steep wall near the bottom faces the north pole.
 
45290 2350icelayerscloseer.jpg|Close view of depression, as seen by HiRISE under HiWish program  Arrows indicate where there is a very thin, 1-2 meter covering on what is believed to be ice.
 
</gallery>
 
 
== See also ==
 
== See also ==
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*[[HiWish program]]
 
*[[HiWish program]]
 
* [[Diacria quadrangle]]  
 
* [[Diacria quadrangle]]  

Latest revision as of 17:40, 9 November 2020

Mars topography (MOLA dataset) HiRes (1).jpg

Map showing the location of Milankovic Crater

                                            Map showing the location of Milankovic Crater


Milankovič is a impact crater in the Diacria quadrangle. It has a diameter of 118.4 km and is located at 54.7° north latitude and 146.7° west longitude (213.3 E). The crater is easy to see on Mars photographs because it lies north of Olympus Mons and sits by itself in the flat plain in the North. It is named after Milutin Milanković (1879–1958), a Serbian geophysicist and astrophysicist.[1] There is also an asteroid and a crater on the moon named after Milutin Milanković. Milanković Crater is the setting of the short story King of Mars, part of the Mars Mars 2194 by Canadian author Jack Stornoway.


Depressions in Milankovic Crater

The triangular depressions visible in Milankovic Crater contain water ice in the straight wall that faces the pole, according to a new study. This discovery was hailed as a big deal because it means pure water may be easily acquired for future cities on Mars.[2] Eight sites were found with Milankovic Crater being the only one in the northern hemisphere. This discovery is important because the ice lies under only a meter or two of cover. Research was conducted with instruments on board the Mars Reconnaissance Orbiter (MRO).[3] [4] [5] [6] [7]

Depressions with straight southern walls, as seen by HiRISE under HiWish program. Box indicates part enlarged in images below.
Enlargement of above image of straight walled depression Note that the southern wall is dark compared to the northern wall.


The following images are ones referred to in this study of subsurface ice sheets.[8]

See also

References

  1. http://wwwflag.wr.usgs.gov/USGSFlag/Space/nomen/mars/marscrat.html https://web.archive.org/web/20020208134249/http://wwwflag.wr.usgs.gov/USGSFlag/Space/nomen/mars/marscrat.html |
  2. Dundas, E., et al. 2018. Exposed subsurface ice sheets in the martian mid-latitudes. Science. 359. 199.
  3. Steep Slopes on Mars Reveal Structure of Buried Ice. NASA Press Release. 11 January 2018.
  4. Ice cliffs spotted on Mars. Science News. Paul Voosen. 11 January 2018.
  5. https://www.slideshare.net/sacani/exposed-subsurface-ice-sheets-in-the-martian-midlatitudes
  6. http://spaceref.com/mars/steep-slopes-on-mars-reveal-structure-of-buried-ice.html
  7. Colin M. Dundas, et al. Science, 12 January 2018. Vol. 359, Issue 6372, pp. 199-201.
  8. Supplementary Materials Exposed subsurface ice sheets in the Martian mid-latitudes Colin M. Dundas, Ali M. Bramson, Lujendra Ojha, James J. Wray, Michael T. Mellon, Shane Byrne, Alfred S. McEwen, Nathaniel E. Putzig, Donna Viola, Sarah Sutton, Erin Clark, John W. Holt