Isaac Roberts – författare
Visar alla böcker från författaren Isaac Roberts. Handla med fri frakt och snabb leverans.
6 produkter
6 produkter
Häftad, Engelska, 2024
271 kr
Skickas inom 5-8 vardagar
Inbunden, Engelska, 2022
372 kr
Skickas inom 5-8 vardagar
Häftad, Engelska, 2022
235 kr
Skickas inom 5-8 vardagar
Häftad, Engelska, 2010
395 kr
Skickas inom 7-10 vardagar
A geologist and fellow of the Royal Astronomical Society, Isaac Roberts (1829-1904) made significant contributions to the photography of star-clusters and nebulae. By championing reflecting rather than refracting telescopes, Roberts was able to perceive previously unnoticed star-clusters, and was the first to identify the spiral shape of the Great Andromeda Nebula. Roberts' use of a telescope for photographing stars, and a long exposure time, provided greater definition of stellar phenomena than previously used hand-drawings. Although Roberts' conclusions about the nature of the nebulae he photographed were not always correct, the book is significant for the possibilities it suggests for nebular photography. Published in London in 1893 and 1899, the two-volume Photographs of Stars represents the summation of his work with his assistant W. S. Franks at his observatory in Crowborough, Sussex. Volume 1 contains 51 collotype plates of stars, and descriptions of his instruments and methods.
Häftad, Engelska, 2010
408 kr
Skickas inom 7-10 vardagar
A geologist and fellow of the Royal Astronomical Society, Isaac Roberts (1829-1904) made significant contributions to the photography of star-clusters and nebulae. By championing reflecting rather than refracting telescopes, Roberts was able to perceive previously unnoticed star-clusters, and was the first person to identify the spiral shape of the Great Andromeda Nebula. Roberts' use of a telescope for photographing stars, and a long exposure time, provided greater definition of stellar phenomena than previously used hand-drawings. Although Roberts' conclusions about the nature of the nebulae he photographed were not always correct, the book is significant for the possibilities it suggests for nebular photography. Published in 1893 and 1899, the two-volume Photographs of Stars represents the summation of his work with his assistant W. S. Franks at his observatory in Crowborough, Sussex. Volume 2 contains 29 plates of stars, and his conclusions about their origins and nature.
Häftad, Engelska, 2008
381 kr
Skickas inom 3-6 vardagar