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  • Released Tuesday, February 5, 2013
  • Updated Thursday, December 3, 2015 at 12:35PM
  • ID: 11184
The closest planet to the sun seems an odd place to find enough ice to bury a city.

The closest planet to the sun seems an odd place to find enough ice to bury a city.

The planet's north pole gets little sunlight, especially in deep craters, as seen in this animation that simulates one Mercury day.

Mercury is hot. Temperatures top 440 degrees Fahrenheit even in areas (red) of its north pole. Yet some spots (blue) stay below -200 degrees.

Mercury is hot. Temperatures top 440 degrees Fahrenheit even in areas (red) of its north pole. Yet some spots (blue) stay below -200 degrees.

Cold, shadowed craters at Mercury's north pole, such as Kandinsky and Prokofiev, can be three miles deep and may never receive any sunlight.

Cold, shadowed craters at Mercury's north pole, such as Kandinsky and Prokofiev, can be three miles deep and may never receive any sunlight.

How does Mercury get its ice? The first step may be a crash landing in one of its craters by an icy comet or asteroid.

How does Mercury get its ice? The first step may be a crash landing in one of its craters by an icy comet or asteroid.

Step 2: Ice and frozen chemicals scatter across the crater, including areas that are always shaded from sunlight.

Step 2: Ice and frozen chemicals scatter across the crater, including areas that are always shaded from sunlight.

Step 3: Ice remains in the shadows but disappears from areas that get sunlight. In time, a dark, insulating layer (black) may cover the ice.

Step 3: Ice remains in the shadows but disappears from areas that get sunlight. In time, a dark, insulating layer (black) may cover the ice.

For More Information

See NASA.gov

Credits

Please give credit for this item to:
NASA's Goddard Space Flight Center
Cover image courtesy of NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Video courtesy of NASA Goddard Space Flight Center/Massachusetts Institute of Technology/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
North pole temperature image courtesy of NASA/UCLA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Topography image courtesy of NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Cartoon sequence courtesy of NASA/UCLA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

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