Microorganism transport from Earth to Mars

Titan , Mars and Earth : Entropy Production by Latitudinal Heat Transport

Temperature contrasts between warm tropics and cool high latitudes depends on how efficiently heat is transported by the atmosphere (and oceans) from the tropics. This heat transport is generally assumed to be proportional to atmospheric pressure, but we show with a simple model that this prediction fails by orders of magnitude for Mars and Titan. However, a basic principle, previously postulat...

Zircon from the Moon , Earth and Mars

Large Aeolian Ripples: Extrapolations from Earth to Mars

Introduction: The shapes produced on terrestrial surfaces that are continually subject to aeolian processes range in size from tiny ripples to giant draa [1]. The physical mechanism of the formation of ripples, the smallest of aeolian bedforms, is intimately related to saltation and reptation processes. Sand and granule ripples are typically tens of reptation path lengths wide and do not alter ...

A low temperature transfer of ALH84001 from Mars to Earth.

The ejection of material from Mars is thought to be caused by large impacts that would heat much of the ejecta to high temperatures. Images of the magnetic field of martian meteorite ALH84001 reveal a spatially heterogeneous pattern of magnetization associated with fractures and rock fragments. Heating the meteorite to 40 degrees C reduces the intensity of some magnetic features, indicating tha...

Barchan dune asymmetry: Observations from Mars and Earth

0019-1035/$ see front matter 2009 Elsevier Inc. A doi:10.1016/j.icarus.2009.08.023 * Address: Planetary Science Institute, 1700 E. Ft. Lo USA. Fax: +1 520 795 3697. E-mail address: [email protected]. Barchan dune asymmetry refers to the extension of one barchan limb downwind. It is a common dune form on Earth and also occurs on Mars and Titan. A new classification of barchan limbs is presented wh...