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Photo of the Milky Way taken by my son John 10 November 2023
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Yesterday
I was reading Chaucer’s delightful Parliament of Fouls. Early on, the narrator
says he fell asleep reading Cicero’s “Dream of Scipio,” and he retells the
story for the reader. In the dream, Scipio meets his grandfather who “showed
him the Galaxy.”
Then
today I was reading The Marriage of Philology and Mercury, a 5th century Latin
work by Martianus Capella. In Book II, Philology is ascending through the
heavenly spheres on her way to the wedding. When she reaches the upper limits
of the cosmos, the narrator says, “The incandescence of a milk-white river
gradually flowed down from the burning stars. Full of joy and thanksgiving she
turned toward the Galaxy where she knew that Jove had assembled the divine
senate.”
I
wondered whether the word “galaxy” was used in the original Latin so I looked
it up and sure enough it says, “iter in Galaxeum flectit.” Galaxias is itself a
borrowing from Greek.
The
story behind the word galaxy is a fun one, so I thought I’d share it.
Prior to
modern astronomy, Galaxy simply meant the Milky Way, γάλα [gala] being the
Greek word for milk. The story is that after Zeus’s son Heracles was born to
the mortal woman Alcmene, Zeus waited till his wife, Hera, was asleep and put
the newborn to nurse from her so he could partake of the divine quality of her
milk and become divine himself. When Hera woke up and found she was nursing a
strange infant, she thrust him away causing milk to spurt from her out into the
heavens, and that’s the origin of the Milky Way.
If you study
the word “galactic,” you’ll see “lac” in the middle of it. This is because the
Latin root lac, milk, seems to have come from an earlier word which has been
reconstructed as either *g(a)lag- or *g(a)lakt-. In English, we get from this
root lactate, latte, and even lettuce.
Our word
milk comes from the Indo-European root melg- which is a verb and means “to rub
off,” and also “to milk.” It’s related to the word emulsion which comes from
the Latin emulgeo, “to milk out.” In English, the verb milk seems to predate
the noun milk. It’s been used from the beginning to refer specifically to human
or animal milk. Incidentally, mammals and the mammary glands are named after
mamma, which means mother in English, but it means breast in Latin. They both
come from the same root, ma-, which means mother, and gives us the Greek Maia (good
mother) and also maieutic, which means to act as a midwife, and is the word
17th century philosophers used to describe the Socratic method.
The Old
English language also used the word milk to refer to the milky juice you can
get from a plant. The 2nd century text Herbarium by Pseudo-Apuleius describes
getting milk from wyrte/wort, meaning from a plant (think of the “wort” in St.
John’s Wort). “Almond milk” has been used since at least the 1300s, so keep
this in mind next time one of your friends scoffs at people talking about
almond milk, and insists that milk can only properly refer to that which is
produced by the mammary glands. :-D
* In
linguistics, the asterisk before a word means that the word can’t be found
written anywhere, so scholars have made an educated guess about what it
probably was.