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	Magazine > Back Issues > 2009 Hunting Runaway Black Holes When galaxies merge, their central supermassive black holes could merge in such a way that gets them kicked out of the galaxy’s center, careening off into space. Learn what special conditions could result in this "gravitational rocket," and how astronomers are already looking for these displaced black holes. Subscribe Today! Subscription Length: 1 yr - US only - $24 2 yrs - US only - $42 3 yrs - US only - $60 1 yr - Canada/Mexico - $29 2 yrs - Canada/Mexico - $50 3 yrs - Canada/Mexico - $72 1 yr - International - $40 2 yrs - International - $72 3 yrs - International - $105 Subscription Type: New Subscription Renewal Gift Order by Phone: Call 800-STARDATE (8-5 CT, Monday-Friday) By Mail: Send a check or money order for $24 for a one-year subscription (U.S. only) to: StarDate magazine 1 University Station A2100 Austin, TX 78712
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