Archive for April, 2007

M45: Pleiades cluster photographed by Spitzer Space Telescope

April 13, 2007

[M45, SST]

Credit: NASA/JPL-Caltech/J. Stauffer (SSC/Caltech)

Astronomers have used the Spitzer Space Telescope to
create this false-color IR image of the Pleiades Star Cluster, M45. This image is made up of data taken by Spitzer’s multiband imaging photometer and its infrared array camera. Light with a wavelength of 4.5 microns is blue; light of 8 microns is green; and light of 24 microns is red.

Spitzer Space Telescope Press Release:

SEDS M45 page:


M106: Anomalous Arms

April 11, 2007

Anomalous Arms show up in this multi-wavelength false-color composite image of M106 (NGC 4258).
In addition to the two well-known arms visible in visible and UV light, radio and x-ray images show two more, invisible (or visually very faint) spiral arms. Investigation with XMM-Newton, Chandra X-ray Observatory, and Spitzer Space Telescope have confirmed now that these arms are composed of gas heated by shock waves.

Credit: X-ray: NASA/CXC/Univ. of Maryland/A.S. Wilson et al.; Optical: Pal.Obs. DSS; IR: NASA/JPL-Caltech; VLA: NRAO/AUI/NSF

Chandra Press Release:

Spitzer Press Release:

NASA GSFC Press Release:

ESA XMM Newton Press Release:

SEDS M106 page:

Messier Marathon 2007: Results

April 11, 2007

Messier Marathon 2007 results are available at:

Please contribute your results!