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This image shows the launch of the ACE spacecraft aboard the Delta II.

ACE Launch

The Advanced Composition Explorer (ACE) was launched at 10:39 a.m., August 25, 1997.

The ACE was launched aboard a Delta II rocket. Mission lifetime is expected to be two years for the primary mission with an expected three year secondary phase.

Johns Hopkins University Applied Physics Lab provided launch operations support while NASA Goddard is providing ground system support.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA