. Guide leaflet. s tell us that about 400,-000,000 celestial objects enter the earthsatmosphere every day, that about 20,000,-000 are large enough to form shootingstars or meteors, and that of this number aminimum of but one per day is of sufficientsize to reach the earth and constitute ameteorite. At first it may seem strangethat so many meteors enter the atmos-phere and so few reach the earth. Whenit is recalled, however, that meteoritesvary from sizes microscopic to objectsmeasured in tens of cubic feet, that theyenter the upper rarefied layers of theearths atmosphere at speeds varyingfrom
. Guide leaflet. s tell us that about 400,-000,000 celestial objects enter the earthsatmosphere every day, that about 20,000,-000 are large enough to form shootingstars or meteors, and that of this number aminimum of but one per day is of sufficientsize to reach the earth and constitute ameteorite. At first it may seem strangethat so many meteors enter the atmos-phere and so few reach the earth. Whenit is recalled, however, that meteoritesvary from sizes microscopic to objectsmeasured in tens of cubic feet, that theyenter the upper rarefied layers of theearths atmosphere at speeds varyingfrom 8 to 50 miles per second, and thatthe atmosphere offers great resistance totheir passage, it is not surprising that inthe few seconds of their flight through theatmosphere that most of them are heatedto the point ofincandescence andconsumed beforethey reach theearth. Artists Conception of Novemeer MeteorsNovember , 1866 ? 9 FORTY TONS OF CORAL ROY WALDO MINER Curator of Living Invertebrates, American Museum.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
