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Mercury
Mercury's surprising core and landscape
Thursday, 22 March 2012 13:29
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Solar system - Mercury

Mercury

On March 17, the tiny MESSENGER spacecraft completed its primary mission to orbit and observe the planet Mercury for one Earth-year. The bounty of surprises from the mission has completely altered our understanding of the solar system’s innermost planet.

 
Colour close-up of crater on Mercuury
Thursday, 16 February 2012 02:45
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Solar system - Mercury

Kuiper crater on Mercury

This high-resolution enhanced color view of Kuiper crater shows not just the bright rays that extend out from this relatively young crater but also the redder color of Kuiper's ejecta blanket. The redder color may be due to a compositionally distinct material excavated from depth by the impact that formed Kuiper.

 
Mercury’s spin–orbit resonance explained
Tuesday, 13 December 2011 15:08
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Solar system - Mercury

The planet Mercury rotates three times about its spin axis for every two orbits about the Sun, in a 3/2 spin–orbit resonance. This unique state has been explained by an initial rapid prograde rotation, which was then decelerated by tidal torques to the present resonance.

 
Mercury still geologically active
Friday, 28 October 2011 00:14
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Solar system - Mercury

Hollows in a crater on Mercury

The MESSENGER spacecraft has discovered strange hollows on the surface of Mercury. Images taken from orbit reveal thousands of peculiar depressions ranging in size from 20m to 1,6km across and 20-40m deep. No one knows how they got there.

 
Mercury's poles sandblasted by Solar radiation
Thursday, 13 October 2011 13:13
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Solar system - Mercury

Mercury's magnetic field and the solar wind

The solar wind sandblasts the surface of planet Mercury at its poles, according to new data from a University of Michigan instrument on board NASA’s MESSENGER spacecraft.

 
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