
As part of the work for the Read a Classic Novel…Together channel, I’ve been reading a very old classic indeed, The Life and Opinions of Tristram Shandy, Gentleman (almost always abbreviated to just Tristram Shandy). Published by Laurence Sterne in 1767, it’s a very funny, sly book—kind of like Curb Your Enthusiasm, but in the 18th Century—and I found myself imagining George Washington reading it (and laughing his ass off) while holed up in some winter bunker during the dark days of the American Revolutionary War.
The story is told by Shandy himself, a very smart but self-absorbed and neurotic man (again, a lot like Larry David) who tells his life story in wry, sardonic, and occasionally schizophrenic prose. At one point in his rambling narrative, he mentions the “seven planets” in the heavens, which surprised me. Sure, I knew that even the ancient Romans knew about the inner planets, as well as Jupiter and Saturn. But the fact that the unfathomably distant Uranus was known in the 18th Century struck me as remarkable.
As it turns out, I was wrong. Uranus was not discovered until 1781, over a decade after Sterne wrote his novel (but still much earlier than I thought). Which means that there is no way that either Sterne, the writer, nor Shandy, the character, could have known about the actual seventh planet.
So, what, exactly, is Shandy alluding to in the “seven planets” bit? It seems that he was referring to the astrological planets in their classical (and very unscientific) sense, i.e., the Moon, Mercury, Venus, the Sun, Mars, Jupiter, and Saturn. This context makes sense, in retrospect, because Shandy is obsessed with astrology and its supposed effect on a person’s character. (Yes, he’s a bit of a kook.)

By the time I sorted all this out, however, it was too late; I was already deep down the Wikipedia rabbit-hole. I looked up the history of the outermost planet (not to be confused with the dwarf planets like Pluto and Ceres), Neptune. Neptune was discovered by French astronomer Urbain Le Verrier in 1846. Not only was it the first planet to be discovered entirely by telescope, it was also the first one whose existence was surmised before it was actually observed. That is, Verrier and fellow astronomer John Couch Adams had noticed irregularities in Uranus’s orbit, which, they suspected, might be caused by a seventh, hitherto unseen planet. They then deduced the probable location of this hypothetical planet and hunted it down.
And that’s not all! I also learned that Neptune was actually discovered before it was discovered. As historians found later, Neptune was seen at least three times before, by Galileo Galilei in 1613, Jérôme Lalande in 1795, and John Herschel in 1830. Each of these men recorded seeing something in that spot, but none of them realized it was a planet and not just a weird “fixed” star.
Apparently, this sort of thing happens with some frequency in the world of science, to the point that it actually has a name: precovery. In a precovery, someone finds all the information they might need to make a real (and potentially career-making) discovery, but they never put the pieces together. (Or, at least, they never publish a paper about it.)
I think there might be a profound lesson here about the difference between data and knowledge, observation and understanding.
It’s also a lesson about publishing what you’ve got, ASAP. Before some other doofus steals your thunder.
