Slipher (Martian crater)
Slipher is an impact crater in the Thaumasia quadrangle of Mars , located at 47.8°S latitude and 84.6°W longitude. It measures 127.14 kilometers in diameter and was named after American astronomers Vesto and Earl Slipher . The naming was approved by IAU's Working Group for Planetary System Nomenclature in 1973. [1]
Page Revisions
| Year | Metadata | Sections | Top Words | First Paragraph |
| 2018 |
79346 characters 3 sections 6 paragraphs 3 images 661 internal links 5 external links |
slipher 0.426 gullies 0.400 changes 0.247 dry 0.175 frost 0.165 incised 0.160 coracis 0.147 earl 0.132 istok 0.132 craterlet 0.132 gully 0.132 warrego 0.124 vesto 0.118 claritas 0.113 slopes 0.096 |
Slipher is an impact crater in the Thaumasia quadrangle of Mars , located at 47.8°S latitude and 84.6°W longitude. It measures 127.14 kilometers in diameter and was named after American astronomers Vesto and Earl Slipher . The naming was approved by IAU's Working Group for Planetary System Nomenclature in 1973. [1] |
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| 2017 |
17465 characters 3 sections 6 paragraphs 3 images 29 internal links 5 external links |
slipher 0.426 gullies 0.400 changes 0.247 dry 0.175 frost 0.165 incised 0.160 coracis 0.147 earl 0.132 istok 0.132 craterlet 0.132 gully 0.132 warrego 0.124 vesto 0.118 claritas 0.113 slopes 0.096 |
Slipher is an impact crater in the Thaumasia quadrangle of Mars , located at 47.8°S latitude and 84.6°W longitude. It measures 127.14 kilometers in diameter and was named after American astronomers Vesto and Earl Slipher . The naming was approved by IAU's Working Group for Planetary System Nomenclature in 1973. [1] |
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| 2015 |
12457 characters 2 sections 1 paragraphs 2 images 13 internal links 4 external links |
gullies 0.454 slipher 0.363 changes 0.281 dry 0.200 frost 0.188 incised 0.182 gully 0.150 vesto 0.134 slopes 0.109 walls 0.106 young 0.104 steep 0.103 thread 0.102 tending 0.100 gasa 0.100 |
Slipher Crater is an impact crater in the Thaumasia quadrangle of Mars, located at 47.8°S latitude and 84.6°W longitude. It is 127.0 km in diameter and was named after Vesto Slipher , and the name was approved in 1973. [1] Gullies are visible on the walls of a crater that is on the rim of Slipher. They can be seen in the pictures below. Martian gullies are small, incised networks of narrow channels and their associated downslope sediment deposits, found on the planet of Mars . They are named for their resemblance to terrestrial gullies . First discovered on images from Mars Global Surveyor , they occur on steep slopes, especially on the walls of craters. Usually, each gully has a dendritic alcove at its head, a fan-shaped apron at its base, and a single thread of incised channel linking the two, giving the whole gully an hourglass shape. [2] They are believed to be relatively young because they have few, if any craters. A subclass of gullies is also found cut into the faces of sand dunes which themselves considered to be quite young. On the basis of their form, aspects, positions, and location amongst and apparent interaction with features thought to be rich in water ice, many researchers believed that the processes carving the gullies involve liquid water. However, this remains a topic of active research. As soon as gullies were discovered, [2] researchers began to image many gullies over and over, looking for possible changes. By 2006, some changes were found. [3] Later, with further analysis it was determined that the changes could have occurred by dry granular flows rather than being driven by flowing water. [4] [5] [6] With continued observations many more changes were found in Gasa Crater and others. [7] With more repeated observations, more and more changes have been found; since the changes occur in the winter and spring, experts are tending to believe that gullies were formed from dry ice. Before-and-after images demonstrated the timing of this activity coincided with seasonal carbon-dioxide frost and temperatures that would not have allowed for liquid water. When dry ice frost changes to a gas, it may lubricate dry material to flow especially on steep slopes. [8] [9] [10] In some years frost, perhaps as thick as 1 meter. |