Mercury TOP STORY
Mercury Contracted More Than Prior Estimates 
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Mercury
New evidence gathered by NASA's MESSENGER spacecraft at Mercury indicates the planet closest to the sun has shrunk up to 7 kilometers in radius over the past 4 billion years, much more than earlier estimates.
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Mercury
MESSENGER Surpasses 200,000 Orbital Images of Mercury
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Mercury as Seen By MESSENGER
The 1996 proposal for the mission promised a return of at least 1,000 images says Robert Gold, MESSENGER's Science Payload Manager.
Mercury
John Lennon's Crater on Mercury
Lennon crater was recently named to honor English musician/singer/songwriter John Lennon (1940-1980).
Mercury
The Walls of Crater Damer on Mercury
The steep walls of the crater Damer are highlighted in today's image.
Mercury
Looking at The Horizon of Mercury
Three named craters are featured prominently in this view.
Mercury
MESSENGER Celebrates 1,000 Earth Days in Orbit around Mercury
The MESSENGER spacecraft has completed 1,000 Earth days of flight operations in orbit around Mercury.
Mercury
Craters in the Caloris Basin on Mercury
This image features several craters near the eastern edge of the Caloris basin. The larger craters have excavated low reflectance material, and both have hollows forming within their floors.
Mercury
An Explanation of the Rotational State of Mercury
Planetary scientists are announcing today a new explanation of the current rotational state of the planet Mercury. The report is being presented by Dr. Benoit Noyelles of the University of Namur, Belgium, to the meeting of the Division for Planetary Sciences of the American Astronomical Society, held in Denver, CO.
Mercury
1,000th Featured Image from the Mercury MESSENGER Spacecraft
The MESSENGER project is celebrating the posting today of the 1,000th featured image from Mercury. The Mercury Dual Imaging System (MDIS) team has posted a new image to the MESSENGER website approximately once per business day since March 29, 2011, when the first image obtained from orbit about the innermost planet was made public.
Mercury
Mercury - Peaking into the Dark
In this dramatic scene, an unnamed crater in Mercury's northern volcanic plains is bathed in darkness as the sun sits low on the horizon.
Mercury
Enhanced Color Mercury Map
This colorful view of Mercury was produced by using images from the color base map imaging campaign during MESSENGER's primary mission.
Mercury
NASA Software Updated for 3D View of Mercury
NASA's ACT-REACT Quickmap tool has recently been updated with a new 3D Live View function to visualize the surface of Mercury.
Mercury
Mercury: Fiery Yellow, Scattered Blue
This false color image shows a bright fresh crater exhibiting possible evidence of a pyroclastic deposit on it's eastern side (shown by the bright yellow); as well as a series of secondaries which have excavated sub-surface material resulting in the blues seen in the north-east corner of the image.
Mercury
NASA and Italian Space Agency Sign Agreement on Exploration of Mercury
At a meeting in Rome Thursday, NASA Administrator Charles Bolden and Italian Space Agency (ASI) President Enrico Saggese signed a Memorandum of Understanding for cooperation on the European Space Agency- (ESA) led BepiColombo mission to Mercury, strengthening mutually beneficial cooperation between NASA and ASI in planetary exploration.
Mercury
A View of Mercury From Afar
This image of Mercury, acquired by the Mercury Dual Imaging System (MDIS) aboard NASA's MESSENGER mission on April 23, 2013, allows us to take a step back to view the planet.
Mercury
Mercury 100% Coverage
At the very end of 2012, MESSENGER obtained the final image needed to view 100% of Mercury's surface under daylight conditions. The mosaics shown here cover all of Mercury's surface and were produced by using the monochrome mosaic released by NASA's Planetary Data System (PDS) on March 8, 2013, as the base. The full resolution mosaics are available for download on MESSENGER's Global Mosaics webpage.
Mercury
MESSENGER Completes Its 2,000th Orbit of Mercury
MESSENGER began its 2,000th orbit around Mercury earlier this week, on May 22. The spacecraft completed its primary mission on March 17, 2012, and its first extended mission on March 17, 2013.
More top stories from April.
Mercury Mission Reports
BepiColombo
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