At this week's meeting of the American Astronomical Society in San Diego, Knezek and Zoltan Levay (Space Telescope Science Institute) unveiled a stunning image of NGC 1300, a large, 10th-magnitude barred spiral some 70 million light-years distant in the constellation Eridanus. The elongated bar's yellowish cast attests to a makeup chiefly of old stars, while pinkish nebulae and clots of bright blue stars along the arms' outer edges indicate recent and ongoing star formation. "We're still learning a lot" about barred spirals, said Knezek. "This image, I think, will help out tremendously because of the level of detail" it shows.
Hubble's Advanced Camera for Surveys took visible-light images of two adjacent fields to produce this 5½-arcminute-wide mosaic — nearly one-fifth as wide as the Moon.