The space ball. What is it? Namibia's National Forensic Science Institute/AFP/Getty Images hide caption itoggle caption Namibia's National Forensic Science Institute/AFP/Getty Images The Two-Way Cue The Scary Music: 'Space Ball' Crashes In Namibia December 23, 2011 It's said to be made of a "metal alloy known to man." But it isn't known yet just what it is. The object weighs about 13 pounds and is about 43 inches in circumference. Local authorities say it doesn't appear to be dangerous.