History of Astronomy |
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Page 78
The iron axis was five feet long and one and a - half inches thick , and the
telescope was fixed near one end with a counterpoise . The telescope - tube was
a double cone , to prevent flexure . Three horizontal and three vertical wires were
used ...
The iron axis was five feet long and one and a - half inches thick , and the
telescope was fixed near one end with a counterpoise . The telescope - tube was
a double cone , to prevent flexure . Three horizontal and three vertical wires were
used ...
Page 81
To render the lunar observations more continuous , Airy employed Troughton ' s
successor , James Simms , in conjunction with the engineers , Ransome and May
, to construct an altazimuth with three - foot circles , and a five - foot telescope ...
To render the lunar observations more continuous , Airy employed Troughton ' s
successor , James Simms , in conjunction with the engineers , Ransome and May
, to construct an altazimuth with three - foot circles , and a five - foot telescope ...
Page 86
Ph . Ast . ) , have led some to suppose that they invented the telescope . ... The
first telescopes were made in Holland , the originator being either Henry
Lipperhey , 4 Zacharias Jansen , or James Metius , and the date 1608 or earlier .
In 1609 ...
Ph . Ast . ) , have led some to suppose that they invented the telescope . ... The
first telescopes were made in Holland , the originator being either Henry
Lipperhey , 4 Zacharias Jansen , or James Metius , and the date 1608 or earlier .
In 1609 ...
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Contents
Ancient GREEK ASTRONOMY | 3 |
INSTRUMENTS OF PRECISIONSIZE OF THE SOLAR | 10 |
GALILEO AND THE TELESCOPENOTIONS OF GRAVITY | 46 |
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Common terms and phrases
accepted accurate ancient appear astronomers attraction bodies born bright calculations called catalogue cause centre century circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect enabled epicycles equal error excentric explain fact fixed follow force Galileo give given gravitation heavenly heavens held Herschel Hipparchus idea included interesting invented Jupiter Kepler knowledge known later light lunar Mars mass mathematical mean measured method miles minutes moon moon's motion move Newton noticed object observations Observatory opposition orbit original parallax pass period photographic physical planetary planets pole position predicted present principle progress proper proved records revolve rotation round Royal satellites says seems seen showed solar system spectroscope spectrum stars studied sun's supported supposed surface tables telescope theory tion trace true Tycho Brahe uniform universal
Bibliographic information
| Title | History of Astronomy Hist. of sci. series History of science series |
| Author | George Forbes |
| Publisher | Watts, 1909 |
| Original from | the University of California |
| Digitized | 13 Jan 2011 |
| Length | 154 pages |
| Export Citation | BiBTeX EndNote RefMan |