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Omega (original 2003; edition 2004)
Omega by Jack McDevitt (2003)
References to this work on external resources.
Wikipedia in English (1)
Amazon.com Product Description (ISBN 0441012108, Mass Market Paperback)
A civilization-destroying omega cloud has switched direction, heading straight for a previously unexplored planetary system--and its alien society. And suddenly, a handful of brave humans must try to save an entire world--without revealing their existence.
(retrieved from Amazon Thu, 12 Mar 2015 18:15:28 -0400)
"Somewhat sentient, the omega clouds obliterate life on every planet in their path. Now one of them is predicted to reach Earth in about 900 years. But between Earth and the cloud, lies the home world of the Korbikkan race. They are humanoid sentients and one of three sentient races known to humanity. Now, mankind must decide whether to marshall the science resources needed and to bring to bear the weaponry needed to save another race without putting itself at risk. Can a human rescue team save thier whole world without letting the inhabitants know they are being saved?"--SFsite.com.
(summary from another edition)
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