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Life and death in the Andromeda Galaxy DR EMILY BALDWIN ASTRONOMY NOW Posted: 10 January 2011 In the most detailed image of the Andromeda Galaxy yet, the Herschel Space Observatory highlights zones of new star formation, while XMM-Newton pinpoints dying stars. ![]() Images collected by Herschel and XMM-Newton cover the life cycle of stars in our neighbouring Andromeda Galaxy. Image: Infrared: ESA/Herschel/PACS/SPIRE/J. Fritz, U. Gent; X-ray: ESA/XMM-Newton/EPIC/W. Pietsch, MPE; optical: R. Gendler. ESA's Herschel and XMM-Newton space telescopes joined forces over Christmas to reveal the life cycle of stellar birth and death at infrared and X-ray wavelengths respectively. Herschel is sensitive to the far-infrared light emitted by the cool dust and gas clouds that harbour the seeds of new stars. The new image reveals details of a large dust ring some 75,000 light years across that wraps around the centre of the galaxy and which boasts at least five concentric rings of star-forming material. Astronomers speculate that this feature might have resulted from a recent collision with another galaxy. In XMM-Newton's image, the glow of star death is revealed in hundreds of X-ray sources, many clustered towards the crowded core of the galaxy. Some of the X-ray sources reveal the sites of shockwaves and debris from already exploded stars, others are pairs of stars caught in a gravitational tug-of-war whereby a dying star is ripping material from its neighbour. The latest image of old friend Andromeda shows just how important space-based images are to reveal the full range of stellar evolution since infrared and X-ray wavelengths are absorbed by Earth's atmosphere, preventing acquisition of ground-based images of the same detail. |
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This special publication features the photography of British astro-imager Nik Szymanek and covers a range of photographic methods from basic to advanced. Beautiful pictures of the night sky can be obtained with a simple camera and tripod before tackling more difficult projects, such as guided astrophotography through the telescope and CCD imaging.Hubble Reborn
The Planets
3D Universe
This new poster features some of the best pictures from NASA's amazing Mars Exploration Rovers Spirit and Opportunity. |
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