Boiling water with a soldering iron in microgravity @benwl

Uploaded April 2008 | Updated September 2026, 2 weeks ago

Soldering iron and water in microgravity onboard the International Space Station.

(April 12, 2003) -- Expedition Six NASA ISS Science Officer Don Pettit performs a water surface tension experiment with a soldering iron, producing convection patterns. This is another installment of Pettit's ongoing series of Saturday Morning Science.

Boiling water with a soldering iron in microgravity

$Plasma Exhaust From The VASIMR VX-200i, HD This is one test firing in a series of experiments with the VASIMR VX-200 plasma rocket prototype. The rockets 1st stage (a Helicon plasma source) was fired at 30 kW using a state-of-the-art solid state RF power supply, and the rockets 2nd stage was fired at 109 kW using a second solid state RF power supply. Argon gas was used as the propellant, and gives a distinctive purple/blue/UV glow. The second half of the video is slowed down to 1/10 speed during the firing of the second stage. The plasma diagnostics that can be seen in this video are situated on an x-y motion stage capable of moving side to side 200cm and in an out 500cm with 0.5mm precision. Because of the extreme temperatures and heating within the plasma exhaust, the diagnostics are all constructed out of refractory metals, high temperature ceramics, or graphite (or all three). The rocket and everything else seen in this video is located within a vacuum chamber, used to simulate the vacuum environment of space. Two cameras mounted within the vacuum chamber record a simultaneous top view and side of the VX-200 plasma exhaust. The VX-200 is the precursor to the VF-200, a flight demonstration unit that is intended to fly on the International Space Station (ISS). http://www.nasa.gov/home/hqnews/2008/dec/HQ_08-332_VASMIR_engine.html www.adastrarocket.com$

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