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Photographer's Note

Due to my job (I am a researcher at the University of Florence) I had the possibility to perform a series of biological experiments in weightlessness (i.e. absence of gravity) in Bremen, to study the chain of signals occurring in plant cells immediately after the zero gravity onset.

Fallturm Bremen is a drop tower at the Center of Applied Space Technology and Microgravity (ZARM) at the University of Bremen in Bremen. It has a 123-meter-high drop tube (actual drop distance is 110 m), in which for 4.74 seconds (with release of the drop capsule), or for over 9 seconds (with the use of a catapult, installed in 2004) weightlessness (i.e. ZERO GRAVITY) can be produced. The entire tower, formed out of a reinforced concrete shank, is 146 meters high.

The 123-meter drop tube is free-standing within the concrete shell, in order to prevent the transmission of wind-induced vibrations, which could otherwise result in the airtight drop capsule hitting the walls. The drop tube is pumped down prior to every free-fall experiment to about 10 Pa (~ 1/10 000 atmosphere). Evacuation takes about 1.5 hours.

(from WIKIPEDIA)

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Photo Information
  • Copyright: sergio mugnai (sergione) Silver Star Critiquer/Gold Note Writer [C: 36 W: 9 N: 57] (582)
  • Genre: Places
  • Medium: Color
  • Date Taken: 2008-11-25
  • Categories: Event
  • Exposure: f/5.3, 1/4000 seconds
  • More Photo Info: view
  • Photo Version: Original Version
  • Date Submitted: 2009-04-07 3:39
Viewed: 2054
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