Note
The alignment of Jupiter's four major moons in the book can never happen in reality. The three inner Galilean satellites are in a resonance with one other such that that whenever two of them are aligned with one another, the third one will always be non-aligned and quite often situated on the opposite side of Jupiter.
Heinlein also postulated that the surface of Ganymede was volcanic rock like the Moon. Subsequent discoveries have shown that Ganymede's crust is actually almost 90% ice or frost, covering a subsurface ocean.
Read more about this topic: Farmer In The Sky
Famous quotes containing the word note:
“For sounds in winter nights, and often in winter days, I heard the forlorn but melodious note of a hooting owl indefinitely far; such a sound as the frozen earth would yield if struck with a suitable plectrum, the very lingua vernacula of Walden Wood, and quite familiar to me at last, though I never saw the bird while it was making it.”
—Henry David Thoreau (1817–1862)
“... if we look around us in social life and note down who are the faithful wives, the most patient and careful mothers, the most exemplary housekeepers, the model sisters, the wisest philanthropists, and the women of the most social influence, we will have to admit that most frequently they are women of cultivated minds, without which even warm hearts and good intentions are but partial influences.”
—Mrs. H. O. Ward (1824–1899)
“No, in your rural letter box
I leave this note without a stamp
To tell you it was just a tramp
Who used your pasture for a camp.”
—Robert Frost (1874–1963)