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 |
GALILEO AND THE TELESCOPENOTIONS OF GRAVITY | 46 |
NEWTONS SUCCESSORS HALLEY EULER | 60 |
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Common terms and phrases
accepted accurate ancient appear astronomers attraction bodies bright calculations called catalogue cause centre century Chinese circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect elements enabled epicycles equal error explain fact fixed follow force four Galileo gave give given gravitation heavens held Herschel increased interesting Jupiter Kepler knowledge known later light lunar Mars mass mathematical mean measured method miles moon moon's motion move nebulæ Newton noted noticed object observations Observatory opposition orbit original parallax pass period photographic physical planet planetary pole position predicted progress proper motion proved records researches revolve ring rotation round Royal satellites seems seen showed solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY
Bibliographic information
| Title | History of Astronomy The history of science series |
| Author | George Forbes |
| Publisher | Watts, 1921 |
| Original from | Indiana University |
| Digitized | 5 Aug 2010 |
| Length | 150 pages |
| Export Citation | BiBTeX EndNote RefMan |