Archive for the ‘M101’ Category

M31 and M101: GALEX images

July 24, 2008

[M31 in UV, GALEX] [M101 in UV, GALEX]

Nasa’s GALEX UV telescope satellite has imaged two famous spiral galaxies, the Andromeda Galaxy M31 and the Pinwheel Galaxy M101. These images are in false color, 2-color composite: far-UV displayed in blue, near-UV in red.

GALEX Feature Story (February 21, 2008):
M31 image:
M101 image:

SEDS M31 page:
SEDS M101 page:


M101: Spitzer finds “No-organic” Zone

July 23, 2008

[M101 in IR, SST]

Spitzer Space Telescope was used to obtain this gorgeous false-color IR image of M101. Astronomers have found from these data that some special organic molecules, so-called polycyclic aromatic hydrocarbons, decrease in concentration toward the outer portion of the Pinwheel galaxy, and then quickly drop off and are no longer detected at its very outer rim.

Spitzer Press Release:

Recent Images and News of Messier Objects

July 15, 2008

M4 (and NGC 6397) from Chandra; April 28, 2008:

M31 and M101 by Galex, February 21, 2008:

M81 from Chandra; June 18, 2008:

M81 group (in particular, Arp’s Loop), from Hubble; January 8, 2008:

M81 group with radio clouds, from NRAO; January 10, 2008:

M82 in X-rays by XMM Newton:

M83 by Galex; April 16, 2008:

M106 by Galex; April 28, 2008:

Various THINGS galaxies, including M51, M63, M74, M81 and several M81 group dwarfs, by NRAO; January 10, 2008:

M101: Hubble Portraits the Pinwheel Galaxy

March 1, 2006

[HST image of M101]

M101 image by Hubble Space Telescope

Astronomers have used the Hubble Space Telescope to create a great portrait of the Pinwheel Galaxy Messier 101: