Counting down…


Herschel was fueled with hydrazine over the Easter weekend and it has now been mated with the rocket payload adaptor. It’s now being topped up with liquid helium and the helium is being pumped on to turn it into superfluid helium-II.

These are all things you only do when you’re very sure you’re going to launch. Among other things hydrazine is a really nasty chemical which you don’t mess with if you can possibly avoid it.

May 6th launch is thus looking pretty solid…


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