A cloud of dust traces the innermost planet’s orbital path. By all accounts, it shouldn’t be there.
Mercury
Posted inResearch Spotlights
MESSENGER Reveals a More Dynamic Mercury Surface
Image pairs indicate that 99% of the planet’s surface could be altered in the next 25 million years.
Posted inResearch Spotlights
Solar Wind a Major Driver of Atmospheric Sodium at Mercury
MESSENGER observations show a 50% rise in atmospheric sodium-group ions during periods of high solar wind activity.
Posted inEditors' Highlights
Plasma Density Distribution in Mercury’s Magnetosphere
A new measurement of plasma density distribution in Mercury’s magnetosphere obtained from observations of field line resonance events provides necessary constraint for many planetary science issues.
Posted inNews
Mercury Mission Will Map Morphology and Measure Magnetics
BepiColombo may launch as early as this weekend. It seeks to unravel the mysteries of Mercury’s geologic and magnetic past and map the small planet’s cratered surface.
Posted inResearch Spotlights
Evidence of Extensive Ice Deposits Near Mercury’s South Pole
New radar observations and refined illumination maps reveal uneven water ice deposits twice the size of those found around the planet’s north pole, suggesting the source may be a recent comet impact.
Posted inEditors' Highlights
Comparing Craters
An analysis suggests that craters degrade faster on Mercury than the Moon, raising questions about landscape evolution on different planetary bodies.
Posted inResearch Spotlights
Observing Mercury’s Brilliant Flares from Earth
Researchers make the first short-term observation of sodium flares in Mercury’s exosphere.
Posted inResearch Spotlights
How Quickly Is Mercury’s Surface Evolving?
New measurements of impact craters on Mercury’s smooth plains suggest that the topography of the solar system’s innermost planet is changing at twice the rate of landforms on the Moon.
Posted inResearch Spotlights
Unprecedented Views of Mercury Constrain Hollow Formation
The consistently shallow depths of the depressions scattered across Mercury's surface suggest their morphology is not determined by the thickness of a volatile-rich outer layer.