A Brief History of Science: As Seen Through the Development of Scientific InstrumentsConstable, 2001 - 425 من الصفحات From the beginnings of history, with gnomons and sundials, through to the twenty-first century and the 26-kilometre underground particle accelerator, the author describes the way that the design and production of scientific instruments has extended the frontiers of science. Man's desire to understand the universe has led to the making of more and more sophisticated instruments - first to record and measure (Arab numerals, standardised measures), to examine ever more minutely (the microscope, the lens, the prism), on through electromagnets, cathode tubes, thermometers, vacuum pumps, X-rays, counters and accelerators, semi-conductors and microprocessors, down to new instruments now being designed to observe matter at zero temperatures - presenting immense technological problems in the requirement for instruments that can operate in conditions where normal properties no longer hold. Accessible popular science |
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... Galaxy . From this he concluded that they were actually part of it , but so far away that if their centre defined that of the Galaxy , the sun would be way off centre . This would also explain the concentration in Sagittarius , noted by ...
... Galaxy . To begin with , the distribution of spiral nebulae made it difficult to accept them as galaxies . There were many more on one side of the Galaxy than the other , and practically none close to the galactic plane . On the other ...
... galaxies , only visible from the southern hemisphere , relatively close to our galaxy , and including groups of stars all at roughly the same distance from us . Magnitude a measure of the luminosity of stars . Apparent magnitude is ...
المحتوى
From the mastery of fire to science in antiquity | 1 |
Copernicus to Newton | 35 |
Science technology and communication | 77 |
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