File:Helium-glow.jpg

DescriptionHelium-glow.jpg English: Vial of glowing ultrapure helium. Original size in cm: 1 x 5 Date 23 July 2009 Source http://images-of-elements.com/helium.php

for a far infrared ‘liquid helium cooled telescope for sortie mode shuttle,’ 1971. The original drawing notes that helium gas vents, a removable vacuum

Creative Commons Attribution-Share Alike 4.0 truetrue English Hollow cathode glow modulator tube author name string: Mister rf Wikimedia username: Mister rf

Creative Commons Attribution-Share Alike 4.0 truetrue English Hollow cathode glow modulator tube author name string: Mister rf Wikimedia username: Mister rf

Creative Commons Attribution-Share Alike 4.0 truetrue English Hollow cathode glow modulator tube object has role: photographer author name string: Mister rf