The year 2013 has been another year of operations and discoveries for MESSENGER, finally including 100% image coverage of the planet by the Mercury Dual Imaging System (MDIS)! As another year draws to a close, we look back at some of the featured images from the year, and look forward to continued operations, including some of the highest-resolution images ever taken of Mercury, in 2014!

• January: They Call Me Muddy Waters
• February: Colors of the Innermost Planet
• March: A Colorful Group
• April: An Unnamed Wonder
• May: 100% Coverage
• June: It's a Sublimation Formation!
• July: Digital Elevation Model of Mercury's Northern Hemisphere
• August: Peek-a-boo!
• September: A Volcanic View
• October: Degas' Impression
• November: A Late Holloween
• December: On the Horizon

You can also revisit previous yearly compilations from 2008, 2009, 2010, 2011, and 2012.

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. MESSENGER has acquired over 190,000 images and extensive other data sets from orbit about Mercury and is capable of continuing orbital operations until early 2015.

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.