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JPL NEWS RELEASE: 2009-085
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May 14, 2009
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HERSCHEL AND PLANCK ON WAY TO STUDY OUR COSMIC ROOTS
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The Herschel and Planck spacecraft launched on May 14, 2009, from the Guiana Space Centre in French Guiana. Image credit: ESA-CNES-Arianespace / Optique Vidéo du CSG
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The Herschel and Planck spacecraft successfully blasted into space at
6:12 a.m. Pacific Time (9:12 a.m. Eastern Time) on May 14 from the
Guiana Space Centre in French Guiana.
The European Space Agency missions, with significant participation from
NASA, hitched a ride together on an Ariane 5 rocket, but now have different
journeys before them. Herschel will explore, with unprecedented clarity,
the earliest stages of star and galaxy birth in the universe; it will help
answer the question of how our sun and Milky Way galaxy came to be. Planck
will look back to almost the beginning of time itself, gathering new details
to help explain how our universe came to be.
"These two missions have spent a lot of time together," said Ulf Israelsson,
NASA project manager for both Herschel and Planck at NASA's Jet Propulsion
Laboratory, Pasadena, Calif. "But now they are going their separate ways,
each ready to do what it does best."
JPL contributed key technology to both missions. NASA team members will play
an important role in data analysis and science operations.
Herschel separated from its Ariane 5 rocket 26 minutes after launch, followed
by Planck about two minutes later. The spacecraft are traveling on separate
trajectories to a point in the Earth-sun system called the second Lagrangian
point, four times farther away than the moon's orbit, or an average distance
of 1.5 million kilometers (930,000 miles) from Earth. They will spend the rest
of their missions independently orbiting this point -- located on the other
side of Earth from the sun -- as they make their way around the sun every year.
See ESA's Herschel and Planck
animations.
Herschel will start preparing for science operations while en route toward its
operational orbit, which will be reached in about two months. Four months later,
the science mission will begin and is expected to last more than three-and-a-half
years. Planck will reach a similar orbit in roughly two months, with science
observations beginning one month later. The mission's science operations are
scheduled to last a minimum of 15 months, with the possibility of an extension.
Both observatories are designed to see light that our human eyes cannot. Herschel
will detect light that has gone largely unexplored until now, with wavelengths in
the infrared and submillimeter range. It will make the most detailed measurements
yet of the cold and dark wombs where the embryos of stars and galaxies have just
begun to grow.
Herschel will also be able to detect key elements and molecules involved in a star's
life, tracing their evolution from atoms to potentially life-forming materials. One
of these molecules is water; astronomers say Herschel will provide a greatly improved
measurement of how much water there is in space.
"Using Herschel is like opening a dirty window and getting a clear view of stars and
galaxies," said Paul Goldsmith, the NASA Herschel project scientist at JPL.
Planck will see longer wavelength light, from the submillimeter to microwave range.
It will work like the ultimate time capsule, to see light that has traveled billions
of years from the newborn universe to reach us. This light, called the cosmic microwave
background, contains information about the Big Bang that created space and time itself.
"Our previous images of the baby universe were like fuzzy snapshots -- now we'll have
the cleanest, deepest and sharpest images ever made of the early universe," said Charles
Lawrence, the NASA Planck project scientist at JPL.
In order to do their jobs, the instruments on both spacecrafts will be icy cold.
Liquid helium will cool the coldest of Herschel's detectors to just 0.3 Kelvin
(minus 459 degrees Fahrenheit), or 0.3 degrees above the coldest temperature
theoretically attainable in the universe. Planck's coldest detectors, which are
chilled by cutting-edge coolers developed in part by JPL, will reach a frosty 0.1 Kelvin.
Herschel is a European Space Agency mission, with science instruments provided
by a consortium of European-led institutes, and with important participation by
NASA. NASA's Herschel Project Office is based at JPL. JPL contributed mission-enabling
technology for two of Herschel's three science instruments. The NASA Herschel Science
Center, part of the Infrared Processing and Analysis Center at the California Institute
of Technology in Pasadena, supports the United States astronomical community. Caltech
manages JPL for NASA. More information is online at
http://www.nasa.gov/herschel
and
http://www.herschel.caltech.edu/
and
http://www.esa.int/herschel.
Planck is a European Space Agency mission, with significant participation from NASA.
NASA's Planck Project Office is based at JPL. JPL contributed mission-enabling
technology for both of Planck's science instruments. European, U.S. and NASA Planck
scientists will work together to analyze the Planck data. More information is online
at
http://www.nasa.gov/planck
and
http://www.esa.int/planck.
Media Relations Office
Jet Propulsion Laboratory
California Institute Of Technology
National Aeronautics and Space Administration
Pasadena, California 91109 Telephone 818-354-5011
http://www.jpl.nasa.gov
Whitney Clavin 1-818-354-4673
Jet Propulsion Laboratory, Pasadena, California
whitney.clavin@jpl.nasa.gov
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