A NASA Discovery mission to conduct the first orbital study
of the innermost planet
NASA logo carnegie institution logo JHU APL logo

Why Mercury?
The Mission
News Center
Science Operations
Who We Are
Related Links

Download iPhone/iPad app Explore orbital data with quickmap Question and Answer End of Orbit Insertion Where is MESSENGER? Where is Mercury now? Subscribe to MESSENGER eNews

Major-element Composition of Mercury Surface Materials
Click on image to enlarge.
Major-element Composition of Mercury Surface Materials
Release Date: June 16, 2011
Topics: HD Resolution Images, NASA Press Conference 06/16/2011, XRS

Date Presented: June 16, 2011, at a NASA press conference
Instrument: X-Ray Spectrometer (XRS)

Of Interest: This figure shows the major-element composition of representative rocks and soils from Earth, Moon, and Mars as displayed on a graph of the ratio by weight of aluminum over silicon versus that of magnesium over silicon. The newly measured major-element composition of Mercury's surface materials are also depicted on the same graph, as measured by the MESSENGER XRS. Mercury has lower Al/Si and higher Mg/Si than typical lunar surface materials and terrestrial basalts, indicating a lower fraction of the common mineral plagioclase feldspar.

The MESSENGER spacecraft is the first ever to orbit the planet Mercury, and the spacecraft's seven scientific instruments and radio science investigation are unraveling the history and evolution of the Solar System's innermost planet. Visit the Why Mercury? section of this website to learn more about the key science questions that the MESSENGER mission is addressing.

Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

For information regarding the use of MESSENGER images, see the image use policy.


   Top  | Contacts
© 1999-2015 by JHU/APL