By D.L. Domingue, C.T. Russell
This is the 1st ebook to provide the technological know-how and tools of NASA’S MESSENGER area venture. The articles, written through the specialists in every one region of the MESSENGER challenge, describe the undertaking, spacecraft, medical pursuits, and payload. The booklet is of curiosity to all power clients of the knowledge lower back by way of the challenge, to these learning the character of Mercury, and through all these drawn to the layout and implementation of planetary exploration missions.
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Additional resources for The MESSENGER Mission to Mercury
4). , ilmenite) results in a trend that is nearly perpendicular to that of iron and maturity: Opaque minerals lower the albedo and increase the UV/visible ratio (Hapke et al. 1980; Rava and Hapke 1987; Lucey et al. 1998). For the Moon, the orthogonal effects of opaques and iron-plus-maturity are readily seen by plotting visible color ratio against reflectance (Lucey et al. 1998). From Mariner 10 UV and orange mosaics a similar plot was constructed for the Mercury observations, and a coordinate rotation resulted in the separation of the two perpendicular trends (opaque mineral abundance from iron-plus-maturity) into two separate images (Robinson and Lucey 1997).
W. Head et al. opaques immature Z O m m m m m m m m m m m m m m m m m m m m m m m m m m mature / FeO low high ORANGE ALBEDO Fig. 4 Trends in the visible color of the lunar surface. The visible color of the lunar surface can be described by two perpendicular trends (opaque mineral concentration and iron-plus-maturity). , anorthosite) reddens the visible slope and lowers the albedo (a translation down the iron-maturity line; upper right to lower left). Color changes in lunar soil during maturation mimic the iron trend.
8 Ga? Can one of the hottest planetary surfaces in the Solar System harbor an inventory of cometary ices? Can a planet containing an iron core proportionally much larger than that of the Earth not show demonstrable surface signs of internal convection? Can we confidently place Mercury in the scheme of geological and thermal evolution without ever having seen more than half of its surface with spacecraft observations? These and other questions formed the basis for the scientific rationale for the MESSENGER mission to Mercury (Solomon 2003).