Rosetta Comet Fires Its Jets
The four images that make up this montage of comet 67P/Churyumov–Gerasimenko
were taken on Sept. 26, 2014 by the European Space Agency’s Rosetta spacecraft.
At the time, Rosetta was about 16 miles (26 kilometers), from the center of the
comet.
In the montage, a region of jet activity can be seen at the neck of the
comet. These jets, originating from several discrete locations, are a product of
ices sublimating and gases escaping from inside the nucleus.
The overlapping and slightly dissimilar angles of the four images that
compose the montage are a result of the combined effect of the comet rotating
between the first and last images taken in the sequence (about 10 degrees over
20 minutes), and the spacecraft movement during that same time.
Launched in March 2004, Rosetta was reactivated in January 2014 after a
record 957 days in hibernation. Composed of an orbiter and lander, Rosetta's
objectives since arriving at comet 67P/Churyumov-Gerasimenko earlier this month
are to study the celestial object up close in unprecedented detail, prepare for
landing a probe on the comet's nucleus in November, and after the landing track
the comet's changes through 2015, as it sweeps past the sun.
Comets are time capsules containing primitive material left over from the
epoch when the sun and its planets formed. Rosetta's lander will obtain the
first images taken from a comet's surface and will provide comprehensive
analysis of the comet's possible primordial composition by drilling into the
surface. Rosetta also will be the first spacecraft to witness at close proximity
how a comet changes as it is subjected to the increasing intensity of the sun's
radiation. Observations will help scientists learn more about the origin and
evolution of our solar system and the role comets may have played in seeding
Earth with water, and perhaps even life.
Rosetta is an ESA mission with contributions from its member states and NASA.
Rosetta's Philae lander is provided by a consortium led by the German Aerospace
Center, Cologne; Max Planck Institute for Solar System Research, Gottingen;
National Center of Space Studies of France (CNES), Paris; and the Italian Space
Agency, Rome. NASA's Jet Propulsion Laboratory in Pasadena, California, a
division of the California Institute of Technology, manages the U.S.
participation in the Rosetta mission for NASA's Science Mission Directorate in
Washington.
For more information on the U.S. instruments aboard Rosetta, visit:
More information about Rosetta is available at:
Image Credit:
ESA/Rosetta/NAVCAM
NASA
Guillermo Gonzalo Sánchez Achutegui
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