Back Champ de dunes de Hagal French Campo de dunas de Hagal Portuguese Cánh đồng cồn cát Hagal Vietnamese 哈葛尔沙丘场 Chinese

Hagal dune field

The Hagal dune field. Image was taken on 6 February 2016 at 15:16 local Mars time.[1][2]

Hagal is the informal name of a dune field on Mars located below the north pole of Mars.[3][4] Its name derives from the sand dunes in Frank Herbert's novel Dune and the fictional planet Hagal.[4] It is located at coordinates 78.0° N latitude, 84.0° E longitude, and consists of linear and round dunes with a southeast slipface orientation.[4] It was one of the dune formations targeted for imaging by the HiRISE camera, on board the Mars Reconnaissance Orbiter, at the rate of one image every six weeks. in the third year (MY31–Mars Year 31)[5] of its seasonal expedition.[4] It is also known as the "Martian Morse Code" due to the linear and rounded formations of its dunes, which have the appearance of dots and dashes.[3][1][6][7]

  1. ^ a b "Martian Morse Code". NASA. 8 July 2016.
  2. ^ Hale, Tom (11 July 2016). "NASA Has Found A "Morse Code Message" On The Surface Of Mars". IFLSCIENCE!. Retrieved 19 July 2017.
  3. ^ a b Jeffrey Kluger (12 July 2016). "Here's What Explains the 'Morse Code' on Mars". Time magazine.
  4. ^ a b c d C.J. Hansen; S. Byrne; G. Portyankina; M. Bourke; C. Dundas; A. McEwen; M. Mellon; A. Pommerol; N. Thomas (2013). "Observations of the northern seasonal polar cap on Mars: I. Spring sublimation activity and processes" (PDF). Icarus (225): 881–897. Retrieved 19 July 2017. Please see note at Table 1 page 883: Table 1 Sites imaged systematically by HiRISE in study year 3 (MY31) of seasonal campaign. The names are informal, some based on the sand dunes in the science fiction book Dune.
  5. ^ Colin M. Dundas; Shane Byrne; Alfred S. McEwen; Michael T. Mellon; Megan R. Kennedy; Ingrid J. Daubar; Lee Saper (27 January 2014). "HiRISE observations of new impact craters exposing Martian ground ice". Journal of Geophysical Research. 119 (1): 109. Bibcode:2014JGRE..119..109D. doi:10.1002/2013JE004482. Six sites were discovered in the northern summer of Mars Year 29 (MY29), seven in MY30, and seven in MY31. (MY refers to the Mars calendar of Clancy et al. [2000], and this notation will be used throughout this paper; years begin at LS = 0°, the beginning of northern spring. MY32 began on 31 July 2013.)
  6. ^ "Martian Morse Code ESP_045334_2580". HiRISE. 29 June 2016.
  7. ^ Jessica F (12 July 2016). "Morse Code in Sand Dunes Found on Mars?". Nature World News. NASA calls the formation the "Martian Morse Code,"
From Wikipedia, the free encyclopedia · View on Wikipedia

Developed by Nelliwinne