Pascal Lee

TL;DR: The present-day martian UV flux is similar to that of early Earth and thus may not be a critical limitation to life in the evolutionary context, it is a constraint to an unadapted biota and will rapidly kill spacecraft-borne microbes not covered by a martian dust layer.

TL;DR: In this paper, the authors integrated the histories of ejecta from the terrestrial planets to study their transfer to Earth and found that the properties of the lunar and martian meteorites are consistent with a recurrent ejection of small meteoroids as a result of impacts on their parent bodies.

TL;DR: In this article, two electrostatic field production mechanisms commonly considered for the Moon, where dust levitation has been repeatedly observed, are applied to asteroids, and possible evidence for fine particle levitation on various asteroids is discussed.

TL;DR: In this article, the authors proposed three distinct stages in the evolution of the hydrothermal system: (1) Early Stage (>200 °C), with the precipitation of quartz (vapor phase dominated), (2) Main Stage (200-100 °C) with the development of a two-phase (vapour plus liquid) zone, leading to calcite, celestite, barite, marcasite and fluorite precipitation; and (3) Late Stage (<100 ° C), with selenite and fibroferrite development through liquid phase-

TL;DR: The surface of 243 Ida is dominated by the effects of impacts as mentioned in this paper, and a complete range of crater degradation states is present, which also reveals optical maturation of the surface (darkening and reddening of materials with increasing exposure age).