A palimpsest /ˈpælɪmpsɛst/, in planetary astronomy, is an ancient crater that has been degraded over time. They may also be referred to as "ghost craters", "degraded craters", "buried craters", or "pathological craters". Palimpsests have been identified on Mercury, the Earth, the Moon, Mars, Ganymede, Callisto, and possibly even Titan. On Mars, these features are morphologically described as craters that are "flat-floored, rimless, extremely shallow, without central peaks, and would probably represent what remains after erosion."[1]
On an icy moon of the outer Solar System, a palimpsest is a crater whose relief has disappeared due to creep of the icy surface ("viscous relaxation") or subsequent cryovolcanic outpourings, leaving a circular albedo feature, perhaps with a "ghost" of a rim. Icy surfaces of natural satellites like Callisto and Ganymede preserve hints of their history in these rings. A typical example is Memphis Facula on Ganymede, a 340 km wide palimpsest.[2]
YouTube Encyclopedic
-
1/3Views:4791 476561
-
Hidden Paintings: the Art of the Palimpsest | Odd Salon UNKNOWN 6/7
-
Penetration Funnels
-
Asteroid Day: Defending Planet Earth - What's New In Aerospace
Transcription
See also
References
- ^ Barata, T.; Alves, E. I.; Machado, A.; Barberes, G. A. (November 2012). "Characterization of palimpsest craters on Mars". Planetary and Space Science. 72 (1): 62–69. Bibcode:2012P&SS...72...62B. doi:10.1016/j.pss.2012.09.015.
- ^ Harland, D. M. (2000-11-10). Jupiter Odyssey (1st ed.). Springer Praxis. pp. 136–137. ISBN 978-1-85233-301-0. OCLC 44461919. OL 8974104M.
 | This planetary geology-related article is a stub. You can help Wikipedia by expanding it. |
This page was last edited on 24 April 2024, at 15:13