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For centuries, our solar system's innermost planet was
shrouded in mystery. Now, for the first time ever, you can use a globe to
explore Mercury's entire surface! This new 12-inch globe was made possible
by NASA's Messenger spacecraft, which recently finished imaging the entire
planet.
The base map comes from about 18,000 Messenger images, and
special image processing has preserved the natural light and dark shading of
the surface. The names of more than 350 craters and other features are
labeled, including craters named after famous artists, musicians, painters,
and authors.
Diameter: 12" (30 cm)
Height: 15" (38 cm)
Weight: 3.7 lbs. (1.7 kg)
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Until
the 1970s, Mercury was almost completely shrouded in mystery because of its
small size and proximity to the Sun. Even the largest telescopes showed only the
subtlest of hints of surface features. That changed in mid 70s, when NASA’s
Mariner 10 spacecraft made three flybys of the innermost planet, revealing a
battered, heavily cratered landscape that was reminiscent of our Moon. Still,
the three flybys managed to image only about 45% of the planet’s surface.
NASA’s Messenger spacecraft (short for Mercury Surface, Space Environment,
Geochemistry, and Ranging) was launched in 2004 and flew by Mercury three times
before entering a highly elongated orbit in March 2011. Over the next two years,
Messenger took thousands of pictures of Mercury’s surface from different
distances and under different illumination conditions. By mid-2013, the
Messenger science team had enough imaging data to produce a global map of
Mercury’s surface.
Music
buffs will enjoy the names of Mercurian craters, since they honor some famous
composers including Bach, Beethoven, and Monk (Thelonious). Other features are
named after great writers, artists, and various contributors to the humanities.
“Huge volcanic plains cover areas such as the Caloris Basin” says mapmaker
Denevi. “And even though much of Mercury is cratered like the lunar highlands,
it appears this terrain is substantially younger than the highlands, has a
different composition, and may have formed in a completely different manner. Our
understanding of the planet is evolving every day.” |