Cool, New Views of Andromeda Galaxy
The ring-like swirls of dust filling the Andromeda galaxy stand out colorfully in this new image from the Herschel Space Observatory, a European Space Agency mission with important NASA participation. Image credit: ESA/NASA/JPL-Caltech/NHSC Full image and caption
This image of an outcrop at the
In this new view of the Andromeda
galaxy from the Herschel space
observatory, cool lanes of forming
stars are revealed in the finest
Image credit: ESA/Herschel/
PACS & SPIRE Consortium, O. Krause,
HSC, H. Linz
Full image and caption
The Andromeda galaxy, also known as Messier 31, lies 2 million light-years away, and is the closest large galaxy to our own Milky Way. It is estimated to have up to one trillion stars, whereas the Milky Way contains hundreds of billions. Recent evidence suggests Andromeda's overall mass may in fact be less than the mass of the Milky Way, when dark matter is included.
Herschel, a European Space Agency mission with important NASA contributions, sees the longer-wavelength infrared light from the galaxy, revealing its rings of cool dust. Some of this dust is the very coldest in the galaxy -- only a few tens of degrees above absolute zero.
In both views, warmer dust is highlighted in the central regions by different colors. New stars are being born in this central, crowded hub, and throughout the galaxy's rings in dusty knots. Spokes of dust can also be seen between the rings.
One view, seen at http://www.nasa.gov/...a/pia16682.html , is a mosaic of data from Herschel's Photodetecting Array Camera and Spectrometer (PACS) and spectral and photometric imaging receiver (SPIRE).
The second view, seen at http://www.nasa.gov/...a/pia16681.html , shows data from only the SPIRE instrument, which captures the longest of wavelengths detectable by Herschel.
Herschel is a European Space Agency cornerstone mission, with science instruments provided by consortia of European institutes and with important participation by NASA. NASA's Herschel Project Office is based at NASA's Jet Propulsion Laboratory, Pasadena, Calif. JPL contributed mission-enabling technology for two of Herschel's three science instruments. The NASA Herschel Science Center, part of the Infrared Processing and Analysis Center at the California Institute of Technology in Pasadena, supports the United States astronomical community. Caltech manages JPL for NASA.
More information is online at http://www.herschel.caltech.edu , http://www.nasa.gov/herschel and http://www.esa.int/SPECIALS/Herschel .
Whitney Clavin 818-354-4673
Jet Propulsion Laboratory, Pasadena, Calif.