Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13...49w&link_type=abstract
Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 July
Astronomy and Astrophysics
Astronomy
Scientific paper
The last decade has seen an efficient use of ground-based telescopes for remote-sensing studies of Mercury's surface at optical infrared and microwave wavelengths. This has resulted in a substantially improved knowledge of its regolith composition material and light scattering properties and structures on the poorly known hemisphere. Specifically such studies have collectively reinforced the idea that the surface is predominantly composed of plagioclase feldspar with minor iron-poor pyroxene and is strongly matured due to space weathering processes. Compared to the Moon the regolith of Mercury appears to be more transparent and more strongly backscattering indicating a smaller abundance of iron and opaque minerals a smaller average grain size and an increased abundance of complex particles with internal scatterers. However substantially improved efforts in observations and modelling are required to better understand the differing properties of the two bodies and to quantify the unique nature of Mercury in the solar system.
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