This page collects links and illustrations related to our paper:
J. L. Margot, S. J. Peale, R. F. Jurgens, M. A. Slade,
I. V. Holin.
Large longitude libration of Mercury reveals a molten core.
Science, 316, 710-714, 2007.
Cornell Chronicle story
Credit line: Nicolle Rager Fuller, National Science Foundation.
Caption: Diagram showing the interior structure of Mercury. The metallic core extends from the center to a large fraction of the planetary radius. Radar observations show that the core or outer core is molten.
Click on the image for a high resolution version.
Credit line: Bill Saxton, NRAO/AUI/NSF
Caption: Artistic rendering of the observational geometry. A radar signal (yellow) is transmitted from the Goldstone antenna in California. Radar echoes (red) are received at the Goldstone antenna and at the Robert C. Byrd telescope in Green Bank, West Virginia.
Credit line: Jean-Luc Margot
Caption: Illustration of the trajectory (green circles, one second time interval) of radar speckles tied to the rotation of Mercury. Observers measured how long it takes for the pattern to travel between two antennas (red triangles) to measure the rotation rate of Mercury.