These might look like trees on Mars, but they're not. Groups of dark brown streaks have been photographed by the Mars Reconnaissance Orbiter on melting pinkish sand dunes covered with light frost. The image was taken near the North Pole of Mars, spring 2010. Objects about 25 centimetres across are resolved on this image, which is about one kilometre wide. Close ups of some parts of this image show billowing plumes indicating that the sand slides were occurring at the time of the photo; see center left.

This is a list of dune fields not on Earth which have been given official names by the International Astronomical Union. Dune fields are named according to the IAU's rules of planetary nomenclature. The relevant descriptor term is undae. As of now, the only two solar system bodies, besides Earth, with named dune fields are Venus and Mars. Dune fields have also been discovered on Saturn's moon Titan,^[1] and a field of giant ripples has been identified on comet 67P/Churyumov–Gerasimenko.^[2]

Venus[edit]

There are three officially named dune fields on Venus. They are named after desert goddesses, as per the IAU's rules. They are listed below.

• 
  Al-Uzza Undae 67.7N, 90.5E – named after Uzza, an Arabian desert goddess


• 
  Menat Undae 24.8S, 339.4E


• 
  Ningal Undae 9.0N, 60.7E – named after Ningal, the wife of the Sumerian desert god Sin
  

Mars[edit]

Dunes in Abalos Undae, Mars appear blueish due to basalt, while the reddish-white areas may be dust.

There are six officially named dune fields on Mars, which are named after nearby classical albedo features in accordance with the IAU's rules. Five of them lie between 75°N to 85°N, between Planum Boreum and Vastitas Borealis. These dune fields span over 200 degrees of longitude. The sixth, Ogygis Undae, lies on the southern hemisphere of Mars. They are listed below.

• 
  Abalos Undae^[3]


• Aspledon Undae


• Hyperboreae Undae


• Ogygis Undae


• Olympia Undae


• Siton Undae

Unofficial field names[edit]

Namib sand dune (downwind side) on Mars
(Curiosity rover; 17 December 2015).

• Namib Undae


• Bagnold dune field, Gale crater. This dune field was explored by Curiosity between initially between mission Sols ~1174–1248, where the rover investigated High dune, and Namib dune. Three orders of bedform were identified: wind ripple, large ripple (or wind drag ripple^[4]) and dune.^[5] Sand grains in this section of the dune field had a modal grain size of 120 μm^[6]


• As part of the Mars Exploration Rover mission, a small dune field unofficially named El Dorado on the south side of Husband Hill in Gusev crater was investigated by the Spirit rover from sols 706 to 710.^[7] Analysis of El Dorado showed that it consists of black wind-blown sand which is "well-sorted, well-rounded and olivine rich.^[8]

Detail of the dunes of the Hagal Dune Field

• The Hagal dune field is named after Frank Herbert's novel Dune and the fictional planet Hagal. The field is also known as the "Martian Morse Code" due to the similarity of the Dune shapes to Morse code dots and dashes.


• Nili Patera dune field

Titan[edit]

• Aztlan^[9]


• Belet^[10]


• Fensal^[10]


• Senkyo^[9]


• 
  Shangri-La^[9]

References[edit]

A large portion of this article was sourced from the Gazetteer of Planetary Nomenclature, the official IAU database of planetary names.

• 
  Ralph Lorenz; James Zimbelman (2014). Dune Worlds: How Wind-blown Sand Shapes Planetary Landscapes. Springer. ISBN 978-3-540-89724-8.