Celestial objects for common telescopesLongmans Green, 1873 |
From inside the book
Results 1-5 of 44
Page 9
... naked eye . But it may be dispensed with by the following method of differentiation ' in all cases , excepting during the brief season of twilight , when neither sun nor stars can be employed . Write down the difference of Right ...
... naked eye . But it may be dispensed with by the following method of differentiation ' in all cases , excepting during the brief season of twilight , when neither sun nor stars can be employed . Write down the difference of Right ...
Page 15
... naked eye ; yet it is demonstrably so . There may be various causes for this illusion ; want of practice , -of sky - room , so to speak , —of a standard of comparison . A similar disappointment is fre- quently felt in the first ...
... naked eye ; yet it is demonstrably so . There may be various causes for this illusion ; want of practice , -of sky - room , so to speak , —of a standard of comparison . A similar disappointment is fre- quently felt in the first ...
Page 16
... naked eye . 8. Do not lose time in looking for objects under unfavour- able circumstances . A very brilliant night is often worthless for planets or double stars , from its blurred or tremulous definition ; it will serve , however , for ...
... naked eye . 8. Do not lose time in looking for objects under unfavour- able circumstances . A very brilliant night is often worthless for planets or double stars , from its blurred or tremulous definition ; it will serve , however , for ...
Page 24
... naked eye . Schmidt records many tints , chiefly violet umbræ and yellowish penumbræ , espe- * He mentions , however , one large and unusually changeable spot , in which he could detect no nucleus ( 1859 ) . Brayley observes that they ...
... naked eye . Schmidt records many tints , chiefly violet umbræ and yellowish penumbræ , espe- * He mentions , however , one large and unusually changeable spot , in which he could detect no nucleus ( 1859 ) . Brayley observes that they ...
Page 25
... naked eye through a fog , or dark glass : he has often re- * An ' over - corrected ' object - glass might possibly cause a violet tinge . Such Dawes found to be the case with his cloudy stratum also , but only in opening spots . Buffham ...
... naked eye through a fog , or dark glass : he has often re- * An ' over - corrected ' object - glass might possibly cause a violet tinge . Such Dawes found to be the case with his cloudy stratum also , but only in opening spots . Buffham ...
Other editions - View all
Common terms and phrases
achr achromatic aperture astronomers atmosphere beautiful Binary bluish Boöt bright brighter brilliant Buffham centre Ceph Clusters colour comet constellation craters Crown 8vo curious dark Dawes diameter disc Double Stars Drac dusky Earth Edition eye-piece faint field flushed white grey Herc Herschel Huggins interior JOHN TYNDALL Jupiter Lassell libration light lilac limb luminous lunar minute stars Moon naked eye nearly Nebulæ noticed nucleus object object-glass observers orange pair pale blue pale white pale yellow photosphere Pisc planet Post 8vo proper motion Red Star reflector region remarkable revised Right Ascension ring ruddy satellites Schm Schr Schröter Schwabe Secchi seen shadow shew side smalt solar sometimes spec spots streaks Taur telescope topaz Triple visible vols Woodcuts XIVh xIxh xvih XVIII yellowish
Popular passages
Page 44 - Fairest of stars, last in the train of night, If better thou belong not to the dawn, Sure pledge of day, that crown'st the smiling morn With thy bright circlet, praise him in thy sphere, While day arises, that sweet hour of prime.
Page 8 - A MANUAL of ARCHITECTURE : being a Concise History and Explanation of the principal Styles of European Architecture. Ancient,, Mediaeval, and Renaissance ; with a Glossary of Technical Terms. By THOMAS MITCHELL. Crown 8vo. with 150 Woodcuts, 10s. 6d. HINTS on HOUSEHOLD TASTE in FURNITURE, UPHOLSTERY, and other Details.
Page 336 - Essays on Astronomy. A Series of Papers on Planets and Meteors, the Sun and Sun-surrounding Space, Stars and Star Cloudlets. By RA Proctor, BA With 10 Plates and '24 Woodcuts.
Page 9 - A Treatise on the Steam Engine, in its various applications to Mines, Mills, Steam Navigation, Railways and Agriculture. By J. Bourne, CE With Portrait, 37 Plates, and 546 Woodcuts. 4/0. 42s. Catechism of the Steam Engine, in its various Applications.
Page 340 - IECTURES on the HISTORY of ENGLAND, from the earliest Times to the Death of King Edward II. By WILLIAM LONGMAN. With Maps and Illustrations. 8vo. 15s. The HISTORY of the LIFE and TIMES of EDWARD the THIRD.
Page 7 - DR. PEREIRA'S ELEMENTS of MATERIA MEDICA and THERAPEUTICS, abridged and adapted for the use of Medical and Pharmaceutical Practitioners and Students; and comprising all the Medicines of the British Pharmacopoeia, with such others as are frequently ordered in Prescriptions or required by the Physician.
Page 12 - Principles of Education drawn from Nature and Revelation, and Applied to Female Education in the Upper Classes. By the same Author.
Page 9 - ENCYCLOPEDIA of AGRICULTURE: comprising the Laying-out, Improvement, and Management of Landed Property, and the Cultivation and Economy of the Productions of Agriculture.
Page 14 - Either of the Three Volumes or Parts of the Alpine Guide may be had with this INTRODUCTION prefixed, price Is.
Page 15 - BECKER'S CHARICLES; a Tale illustrative of Private Life among the Ancient Greeks: with Notes and Excursuses. New Edition. Post Svo.