An image of a sample collected from the Martian soil shows many kinds of particles. The white bar represents 1mm. (Source: NASA/JPL-Caltech/University Arizona)
A second image clearly shows the strips of machine silicon which form the special substrate used to capture microscopic soil particles. The middle visible strip has captured the most particles. Each strip is .4mm in width. (Source: NASA/JPL-Caltech/University of Arizona/Imperial College London)
After a short sticky situation, Phoenix returns some images to Earth.
After successfully reaching Mars at the end of a nine and a half month jaunt through interplanetary space, the Phoenix Lander landed safely on the surface and began broadcasting data back to Earth. Phoenix's well known mission is to study the Martian surface and air, scanning it for traces of life and help to discover how a planet once thought to be at least partially covered with water became an icy desert.
To examine the rust-colored soil, Phoenix uses a robotic arm which wields a small backhoe type bucket to scoop up soil and bring it to the various instruments aboard the lander. Presently, the probe has gathered at least one sample which has been imaged by its Optical Microscope instrument.
The soil sample surprised Phoenix mission crew, being somewhat more clumpy and sticky than was theorized. However, the particles that were imaged by the microscope were successfully deposited upon a custom silicone substrate. The substrate contains several different strips with different sizes and patterns of pegs and holes machined into them. The various patterns are designed to help capture and hold different sizes of particles for imaging not only by the Optical Microscope, but by Phoenix's onboard Atomic Force Microscope.
The images show various types of particles, most notably large particles of dark glassy appearance, probably volcanic in origin, and smaller particles which are more similar to the dust that swirls endlessly in the Martian atmosphere. Also in the mix are at least four different types of minerals.
No reports of life are flooding in from the Phoenix control center. Though the lander has been on Mars for nearly 20 days, data from the instruments is just starting to be collected and analyzed. It may be weeks or months before a sample of ice, what the mission planners are most enthusiastically seeking, is collected for analysis.
Mars may have an active, though slow climate. It may have once teemed with primordial life in liquid water. With any luck and a little work, thanks to the Phoenix lander, we may soon have answers to these unknowns.
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