May 2011 – A Whirlpool in Tucana This image from the NASA/ESA
Hubble Space Telescope shows the galaxy NGC 406 in the
constellation of Tucana. It exhibits spiral arms that are mainly
populated by young, massive, bluish stars and crossed by dark
dust lanes. As is typically observed in this kind of spiral
galaxy, the yellowish central bulge, dominated by an older
stellar population, is less prominent and almost totally
embedded in the disk structure. This calendar is not available
for sale. NASA & ESA