Jan. 6, 2010 - First Light
This infrared snapshot of a region in the constellation
Carina near the Milky Way was taken shortly after NASA's Wide-field Infrared Survey Explorer (WISE) ejected its cover. The "first-light" picture shows
thousands of stars and covers an area three times the size of the Moon. WISE will take more than a million similar pictures covering the whole sky.
The image was captured as the spacecraft stared in a fixed direction, in order to help calibrate its pointing system. The mission's survey will be done
while the satellite continuously scans the sky, and an internal scan mirror counteracts the motion to create freeze-frame images. The team is working now
to match the motions of the spacecraft and the scan mirror precisely. This eight-second exposure shows infrared light from three of WISE's four wavelength
bands: Blue, green and red correspond to 3.4, 4.6, and 12 microns, respectively.
Image Credit: NASA/JPL-Caltech/WISE Team