Fascinating article Mona, thank you, there is so much still to learn Gosh.
And about those 'stars' one can buy............bought one for my brother-in-law for one of those
would rather forget 'Umpty-umpth' birthdays, and know he sometimes goes out to look for 'His Star', which was even given a bizarre name.
Don't think it will be a good idea to tell him what I have just learned from you about them, will keep it all to myself.