Astronomy:Janssen (Martian crater)
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Short description: Crater on Mars
 Location of Janssen Crater | |
| Planet | Mars |
|---|---|
| Region | Arabia quadrangle |
| Coordinates | [ ⚑ ] : 2°42′N 37°36′E / 2.7°N 37.6°E |
| Diameter | 154 km |
Eastern edge of Janssen Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter).
Janssen Crater is an impact crater in the Arabia quadrangle on Mars at 2.7° N and 322.4° W. and is 154 km in diameter. Its name was approved in 1973, and refers to French astronomer Pierre Janssen.[1] Some close up images of the crater reveal layers in a floor deposit. A picture below show these layers, as well as dark slope streaks. The darker the streak, the younger it is. The layers on the floor of Janssen may have been formed on the bottom of lakes.[2][3][4]
See also
References
- ↑ "Gazetteer of Planetary Nomenclature | Janssen". International Astronomical Union. http://planetarynames.wr.usgs.gov/Feature/2801.
- ↑ Cabrol, N. and E. Grin. 2001. The Evolution of Lacustrine Environments on Mars: Is Mars Only Hydrologically Dormant? Icarus: 149, 291-328.
- ↑ Fassett, C. and J. Head. 2008. Open-basin lakes on Mars: Distribution and implications for Noachian surface and subsurface hydrology. Icarus: 198, 37-56.
- ↑ Fassett, C. and J. Head. 2008. Open-basin lakes on Mars: Implications of valley network lakes for the nature of Noachian hydrology.
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