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This computer drawing shows MAP leaving the Sun, Earth and Moon behind as it heads towards the L2 Lagrange point 1.5 million kilometers beyond Earth.
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Courtesy of the MAP Science Team, NASA

Capturing the Afterglow of the Big Bang
News story originally written on June 25, 2001

There is a radiation that fills the universe, called Cosmic Microwave Background Radiation (CMB). CMB radiation is the heat left over from the time after the Big Bang, when the universe was really hot!

Today CMB radiation is very cool; it is only ~2.73 degrees Kelvin. That's just about 3 degrees above absolute zero, the coldest temperature possible. CMB radiation is everywhere!

The MAP (Microwave Anisotropy Probe) will be launched June 30, 2001. MAP's job is to map CMB radiation from across the universe. The map it creates will help scientists look back in time so that they might answer questions like these: What happened right after the Big Bang? How were galaxies that we see today formed? Will the universe expand forever or will it collapse? Does the universe have dark matter? What is the shape of the universe?

The MAP probe will make its CMB radiation map from the L2 Lagrange point, 1.5 million kilometers from Earth. MAP will reach the L2 point in about 3 months after being launched from Earth. The probe will take about 18 months to finish a full-sky map of CMB radiation.

Last modified June 25, 2001 by Jennifer Bergman.

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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