Hi! The third sentence of the message tells us, that the temperature of infinity (or universe or something like that) is 45 (decimal). This could correlate to the microwave backgroud radiation which is equivalent to 2.7 K. This gives us a unit of temerature as 0.06 K! The temperature of Tau ceti itself is given in on one of the next messages as (decimal) 4937.7 K. That conforms very well to a G8 star. But the temperature of their home planet will then be 263.5 K or -9.5 dec C. It is a bit to cold for human-like lifeforms. Perhaps it is only the average temperaure and the Cetis occupy only a samll part of their planet. Or their bodies don't contain water. Or ... -Derik.