Monday, July 6, 2009

Coldest Known Objects in Space

Artist's concept of Planck, with Earth in the background.
The detectors of Planck's High Frequency Instrument reached their amazingly low operational temperature of -273.05 degrees Celsius (-459.49 degrees Fahrenheit), making them the coldest known objects in space. The spacecraft has also just entered its final orbit around the second Lagrange point of the sun-Earth system, called L2.

For more information, go to the story on ESA’s Planck site at http://www.esa.int/SPECIALS/Planck/SEM0Y5S7NWF_0.html

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