Friday, August 26, 2011

Fast Falling Clouds Fuel Milky Way Star Formation

The long-term forecast for the Milky Way is cloudy with gaseous rain. A study by Nicolas Lehner and Christopher Howk of the University of Notre Dame concludes that massive clouds of ionized gas are raining down from our galaxy's halo and intergalactic space and will continue to provide fuel for the Milky Way to keep forming stars. Using the Hubble Space Telescope’s Cosmic Origins Spectrograph they measured for the first time the distances to huge, fast-moving clouds of ionized gas previously seen covering a large fraction of the sky.

Credit: NASA, ESA, and N. Lehner and C. Howk (University of Notre Dame)

Contacts and sources:
Hubble Space Telescope

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