NASAのインスタグラム(nasa) - 12月9日 01時08分

Warm Gas Pours 'Cold Water' on Galaxy's Star-Making: A new feature in the evolution of galaxies has been captured in this image of galactic interactions. The two galaxies seen here -- NGC 3226 at the top, NGC 3227 at the bottom -- are awash in the remains of a departed third galaxy, cannibalized by the gravity of the surviving galaxies. The surge of warm gas flowing into NGC 3226, seen as a blue filament, appears to be shutting down this galaxy's star formation, disrupting the cool gas needed to make fresh stars.

The findings come courtesy of the European Space Agency's Herschel space observatory, in which NASA played a key role, and NASA's Spitzer and Hubble space telescopes. Adding material to galaxies often rejuvenates them, triggering new rounds of star birth as gas and dust gel together. Yet data from the three telescopes all indicate that NGC 3226 has a very low rate of star formation.

Credit: NASA/CFHT/NRAO/JPL-Caltech/Duc/Cuillandre

#nasa #space #galaxy #stars #spitzer #hubble #herschel #esa #astronomy #astrophysics #science

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