radioweather writes "What looked to casual observers like a malfunction, a dangling wire with
something on the end, seen in the
first photo of
the meteorological mast on NASA's
Phoenix Mars Lander,
actually
turned out to be the real instrument. Surprisingly, it is much like the
novelty "weather rock" seen as a novelty gag around the world. The instrument
called the "Telltale"
is described as a "passive wind indicator" and uses an extremely lightweight
Kapton tube hanging in Kevlar fiber. Images taken of the instrument will show
the deflection of the Telltale due to the Martian wind."
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