Word: systemic
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Dates: during 1920-1929
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...Spanish Colonial System", Professor Usher. Widener...
...origin of the several thousand comets that are members of the solar system is equally baffling. The origin of the moons of Mars, and some of the other peculiar satellites, is only guessed at; and perhaps most disturbing of all is the difficulty in accounting for the observed speeds of rotation and revolution of the planets...
...near approach of two stars is an exceedingly rare phenomenon. It is calculated to occur in our galactic system not oftener than once in a thousand million years. The actual collision of two stars would be a much more uncommon occurrence. Even so, however, since the astronomer measures time in terms of ten millions of millions of years, it is probable that many planetary systems exist throughout our galaxy and the innumerable other galaxies that are strewn throughout space...
...rotation is slowing down, that the day is lengthening, and that the moon is receeding; we have learned that after an interval of some fifty thousand million years the month and the day will be the same length again, as they were at the time the earth-moon system was formed. That equality of month and day in the future will be forty seven of our days in length; at the time of the origin of the moon from the earth it was less than five of our present hours in length...
...this anomalous result, which involves tens of thousands of stars, means that we have here a star cloud of dwarfs like the sun, or if it means that we are dealing with a peculiar assemblage of yellowish giant stars at a special stage in the evolution of a stellar system...