Astronomy:Trumpler (Martian crater)
Trumpler is a crater in the Phaethontis quadrangle of Mars, located at 61.8°S latitude and 150.8°W longitude. It measures approximately 78 kilometers in diameter and was named after Swiss-American astronomer Robert Julius Trumpler (1886–1956). The name was approved by IAU's Working Group for Planetary System Nomenclature in 1973.
The first image below shows the relationship among three craters that are near each other. Keeler Crater is to the North of Trumpler Crater. After Keeler was formed, a later impact formed Trumpler Crater, and in the process destroyed part of Keeler.
Trumpler Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter). Dark band near the top is defrosting dunes.
Enlargement of dunes along northern wall (near top of image) of Trumpler Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter). In this image the dunes are not defrosting, as in another image. Dark lines at the top are dust devil tracks on the floor of keeler Crater. Note: this is an enlargement of the next image of Keeler Crater.
Original source: https://en.wikipedia.org/wiki/ Trumpler (Martian crater). Read more