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Updated: October 17, 2026
I wished, of course, to leave the Astronaut secure, and, if not out of reach, yet not within easy reach; otherwise it would have been a simple matter to watch my opportunity and descend in the dark from my first landing-place by the same means by which I had made the rest of my voyage. At 18h.
Greenwich noon is 18h 51m 48s, Washington mean time; so the ephemeris which gives data for every Greenwich noon may be considered as referred to the meridian of Washington giving the data for 17h 51m 48s, Washington time, every day.