|Co-Sponsored NASA GALEX Mission
GALEX Complete the Sky Survey (GCSS):
Start Date: April 1, 2012
We are exploiting the first 9‐12 months in 2012 to complete the newly accessible Milky Way Galactic Plane. We call this the GALEX Complete the Sky Survey (GCSS). NASA planned to close the GALEX mission at the end of December, 2011. A large portion of the Galactic Plane, which we have only recently begun to survey, will have no data. NASA, recognizing the scientific value of the Galactic Plane survey, encouraged the project to seek outside funding for completing the Survey. The Keck Institute for Space Studies was the first organization to provide partial funding for this important project.
The GALEX Complete the Sky Survey will complete the Galactic Plane survey, areas shown in white (see figure above).
While GALEX has been optimized for extragalactic observations, our coverage of the Milky
Way Galactic Plane has been limited by countrate limits set to protect the life of the Near
UV photon‐counting detector at 100 kcps. We have increased those limits to 1 Mcps—the
resulting data quality is still very high and comparable to lower countrate observations. By
For questions contact: Chris Martin
Illustration of NASA's GALEX spacecraft.
IMAGE CREDIT: NASA/JPL/Caltech