Popular Astronomy, Volume 8; Volume 1900Goodsell Observatory of Carleton College, 1900 |
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Page 58
... micrometer readings constituting a single observa- tion , the sixth the residuals , and the seventh the average devia- tion . The eighth column gives the micrometer reading corrected for the breadth of the threads , the ninth its ...
... micrometer readings constituting a single observa- tion , the sixth the residuals , and the seventh the average devia- tion . The eighth column gives the micrometer reading corrected for the breadth of the threads , the ninth its ...
Page 96
... micrometer wire on the corona line , at the last moment , to fix its position was frustrated both in 1870 and in 1878 by the premature ending of totality . PLANET NOTES FOR FEBRUARY . H. C. WILSON . Mercury will be behind the Sun during ...
... micrometer wire on the corona line , at the last moment , to fix its position was frustrated both in 1870 and in 1878 by the premature ending of totality . PLANET NOTES FOR FEBRUARY . H. C. WILSON . Mercury will be behind the Sun during ...
Page 130
... micrometer and entire Observatory equipment . * Through the courtesy of Professor Rees , Director of the Obser- vatory , a photograph of the Rutherfurd measuring micrometer and of the modern Repsold machine accompany this article . The ...
... micrometer and entire Observatory equipment . * Through the courtesy of Professor Rees , Director of the Obser- vatory , a photograph of the Rutherfurd measuring micrometer and of the modern Repsold machine accompany this article . The ...
Page 131
... micrometer threads . The plate rests upon a glass circle and the circle upon three levelling screws . When the glass circle is rotated , the plate is carried around with it . Outside the glass circle is a fixed graduated sil- ver circle ...
... micrometer threads . The plate rests upon a glass circle and the circle upon three levelling screws . When the glass circle is rotated , the plate is carried around with it . Outside the glass circle is a fixed graduated sil- ver circle ...
Page 132
... micrometer both longitudinally and transversely as in the Rutherfurd machine , the longitudinal motion is com- municated to the plate itself by means of the large screw of the machine which moves the plate - carrying casting along a ...
... micrometer both longitudinally and transversely as in the Rutherfurd machine , the longitudinal motion is com- municated to the plate itself by means of the large screw of the machine which moves the plate - carrying casting along a ...
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Common terms and phrases
Algol Allegheny Observatory angle aperture appear astronomical Astrophysical axis bright chart circle clouds College comet coördinates corona craters curve Cygni determined diameter Director discovery distance double stars Earth ephemeris equator equatorial Eros Euclid exposure faint geometry give given Greenwich Harvard College Observatory Herculis hour hour angle inches instrument interest July Jupiter lens Leonids Lick Observatory light magnitude Mars means measures Mercury meridian meteors micrometer minima Moon Moon's motion nebula non-Euclidean geometry objects observations obtained orbit parallax period perpendicular photographic planet plate polar POPULAR ASTRONOMY position Professor Keeler reflector refractor right ascension satellite Saturn seen Sept shadow bands solar solar eclipse spectra spectroscopic spectrum SS Cygni straight Sun's surface telescope tion total eclipse triangle University VARIABLE STARS Venus visible Yerkes Yerkes Observatory