Dear Pooka

The key to the answer to the question " What key is the Universe in" will be included in the penultimate edition of the "Hitchhiker's Guide to the Galaxy"

The answer is as stated in a previous thread. Is based on the "string theory" and on the assumption that the key is being played on a stringed instrument

The answer to the question " How long is a piece of string or even a Mudcat thread" can be determined by the approximation

L= 2(1/2 L) where L is the length of the piece of string in question .
This of course is between the limits of zero and infinity, and as infinity has never been satisfactorily measured it can be assumed to be approximately equal to the answer to the equation X= 42x I/42. Where I is infinity and 42 is the meaning of life.
When the meaning of life is found and defined, it will automatically be changed by the creator of the rain cycle to something completely different
The periodic table showing starting and finishing times of the rain cycle can be found in the addendum to edition of the Hitchhikers Guide to the Galaxy before the penultimate edition. This is due to be published just before hell frezes over
In short, and quite simply, the Key in which the Universe is in, depends on the chosen position of the fickle finger fate, placed on the galactic fingerboard, between any two chosen frets on the previously mentioned string.
The tuning of the string is optional and may change with the temperature and humidity at that time and whether or not atmospheric pressure is present.
This theory cannot be directly applied to brasswind, woodwind or percussive mediums
I hope this answers your question satisfactorily or at least guides you in the right direction.
Have I ever lied to you before?

PS the key can be measured using a backlit electronic tuner using solar powered batteries, but only in a solar system.