Word: coelestium
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...actual structure of the sidereal universe in which the earth plays its ultra-microscopic part, the actual distance to many of the brighter stars had to be measured. When Copernicus promulgated the heliocentric theory in 1543 through the publication of his epoch-making book. 'De Revolution-ibus Orbium Coelestium", it was seen that the motion of the earth in its orbit about the sun should produce an apparent displacement or change in direction of a star as the observer was carried in the space of six months from one side to the other of the orbit 186,000,000 miles...
| 1 |