Jan
31
2008

Mercury: It’s all in the pictures

Moon or Mercury?: This image from the recent Mercury passby of the Messenger spacecraft shows the planet's surface to be much like our Moon's.
Moon or Mercury?: This image from the recent Mercury passby of the Messenger spacecraft shows the planet's surface to be much like our Moon's.Courtesy NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Just like that person heading back from the photo shop with a new packet of developed film, NASA is sharing its latest views of the planet closest to our solar system’s center. And what we’re seeing is surprising astronomers.

The images were among 1,2000 collected by the Messenger spacecraft as it passed Mercury two-and-a-half weeks ago. A full series of photos and movies is available through this NASA link.

These new photos have uncovered some new discoveries about Mercury’s geology. Particularly interesting is a formation called “The Spider,” a crater-like depression with more than 100 narrow troughs radiating from it.

Also discovered were a bunch of ancient volcanoes and a very cratered, rocky surface that makes Mercury look a lot like our Moon.

Messenger will pass by the planet a couple more times in the coming years before settling into an orbit around the planet in 2011 to do further study. Among the tasks it will tackle on that part of the journey is to examine the magnetic fields that spur out from the planet. As far as astronomers can tell, Mercury is the only other planet along with Earth that has such strong magnetic fields.

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