Astronomy—"the perfect science, as we astronomers like to call it." (Jacoby.)
It's my own notion that if, in a real existence, an astronomer could not tell one longitude from another, he'd be sent back to this purgatory of ours until he could meet that simple requirement.
Halley was sent to the Cape of Good Hope to determine its longitude. He got it degrees wrong. He gave to Africa's noble Roman promontory a retroussé twist that would take the pride out of any Kaffir.
We hear everlastingly of Halley's comet. It came back—maybe. But, unless we look the matter up in contemporaneous records, we hear nothing of—the Leonids, for instance. By the same methods as those by which Halley's comet was predicted, the Leonids were predicted. Nov., 1898—no Leonids. It was explained. They had been perturbed. They would appear in November, 1899. Nov., 1899—Nov., 1900—no Leonids.
My notion of astronomic accuracy:
Who could not be a prize marksman, if only his hits be recorded?
As to Halley's comet, of 1910—everybody now swears he saw it. He has to perjure himself: otherwise he'd be accused of having no interest in great, inspiring things that he's never given any attention to.
Regard this:
That there never is a moment when there is not some comet in the sky. Virtually there is no year in which several new comets are not discovered, so plentiful are they. Luminous fleas on a vast black dog—in popular impressions, there is no realization of the extent to which this solar system is flea-bitten.
If a comet have not the orbit that astronomers have predicted—perturbed. If—like Halley's comet—it be late—even a year late—perturbed. When a train is an hour late, we have small opinion of the predictions of time tables. When a comet's a year late, all we ask is—that it be explained. We hear of the inflation and arrogance of astronomers. My own acceptance is not that they are imposing upon us: that they are requiting us. For many of us priests no longer function to give us seeming rapport with Perfection, Infallibility—the Positive Absolute. Astronomers have stepped forward to fill a vacancy—with quasi-phantomosity—but, in our acceptance, with a higher approximation to substantiality than had the attenuations that preceded them. I should say, my-
