Astronomical Register: A Medium of Communication for Amateur Observers and All Others Interested in the Science of Astronomy, Volumes 15-16J. D. Potter., 1878 - Astronomy |
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Page 3
... dark glass . 3. Definition or imperfect focussing has but small influence on the results , the phenomenon changing little so long as a fair focus is obtained . 4. Atmospheric undulations have a consider- able influence tending to give ...
... dark glass . 3. Definition or imperfect focussing has but small influence on the results , the phenomenon changing little so long as a fair focus is obtained . 4. Atmospheric undulations have a consider- able influence tending to give ...
Page 4
... dark glass most suitable for the observations , and this might be attained experimentally at the previous transit of Mercury . Father Perry added that it would be well also to make experiments as to the tint of coloured glasses best ...
... dark glass most suitable for the observations , and this might be attained experimentally at the previous transit of Mercury . Father Perry added that it would be well also to make experiments as to the tint of coloured glasses best ...
Page 7
... dark streak upon the plate . In the last year , after the trial of a variety of methods , I have fairly succeeded , and I thought it would interest the Fellows of the Society to see an enlarged copy of a photograph of the spectrum of ...
... dark streak upon the plate . In the last year , after the trial of a variety of methods , I have fairly succeeded , and I thought it would interest the Fellows of the Society to see an enlarged copy of a photograph of the spectrum of ...
Page 30
... dark limb of Venus which is furthest from the sun . And again , when the planet is seen projected upon the disc , the photospheric light immediately around the dark patch which represents the planet is seen to be a little brighter than ...
... dark limb of Venus which is furthest from the sun . And again , when the planet is seen projected upon the disc , the photospheric light immediately around the dark patch which represents the planet is seen to be a little brighter than ...
Page 31
... dark hemisphere , but I need hardly say that we cannot conceive of such reflection from within the upper surface of the atmosphere of Venus , for the intensity of a reflected ray depends , as is well- known , upon the difference of the ...
... dark hemisphere , but I need hardly say that we cannot conceive of such reflection from within the upper surface of the atmosphere of Venus , for the intensity of a reflected ray depends , as is well- known , upon the difference of the ...
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Common terms and phrases
1st Oc 1st Sh 1st Tr 2nd Oc 2nd Sh 2nd Tr angle aperture appear Ascension Astronomer-Royal Astronomical Register atmosphere bright lines Bye-laws catalogue centre Christie clouds comet Conjunction of Moon corona corresponding Council crater dark diameter Dione disc distance double stars Dunkin eclipse Editor Encel equatorial error Greenwich heliometer Hyginus inches inner satellite instrument Jupiter Jupiter's Satellites light limb longitude Lord Lindsay lunar Mars Mean Noon measures meeting Mercury meteors miles Mimas minor planet moon's motion Neison object observations Occultation orbit paper parallax photographs planet position present prism Proctor Prof Professor proper motions Ranyard Reappearance of ditto remarks Rhea right ascension ring Royal Astronomical Society Royal Observatory Saturn Schröter seen Sidereal slit spectroscope specular reflection spot surface telescope Tethys theory Thur tion transit of Mercury transit of Venus Tues visible