Astronauts Head Upgraded During Spacewalk . ... Credit Copyright: NASA Explanation: First, a new truss was added. ... Now, as part of the planned upgrade of the International Space Station , an Expedition 18 astronaut has upgraded her own head. The Human Extended Analog Device 9000 was attached with only minor delays, making the astronaut's remaining spacewalk s over 40 percent more efficient. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...