Peter, star-parallaxes, [417]
Peters, C. A. F.,
parallax of 61 Cygni,[ 36]
disturbed motion of Sirius,[ 42]
Peters, C. F. W., orbit of Leonid meteors and comet, [332]
Peters, C. H. F., sun-spot observations, [147] [148];
discoveries of minor planets, [283]
star maps, [284] [415]
Peytal, description of chromosphere,[ 69]
Phobos, rapid revolution, [282] [283] [314];
tidal relations, [320] [321]
Photography, solar, [145] [153] [154] [165];
of corona, [166] [173] [175] [178] [181] [185]-190
without an eclipse, [178]-180
of prominences, [167] [197] [198]
of coronal spectrum, [171] [188] [190]
of prominence-spectrum, [195] [198]
of arc-spectrum, [206] [211]
of solar spectrum, [210] [211] [215] [439] [440]
of Uranian spectrum, [305]
of cometary spectra, [354] [357]
of stellar and nebular spectra, [382]-384 [396] [398] [400] [407]
lunar, [152] [153] [268]
detection of comets by, [178] [338] [369]
of asteroids, [284]
of new stars, [399]
use of, in transits of Venus, [234] [236] [240]
Mars depicted by, [277] [281]
Jupiter, [297] [408]
comets, [353] [354] [368] [412]
nebulæ, [395] [401] [407]-409 [411] [425]
Milky Way, [424] [425]
star-charting by, [413] [414]
star-parallaxes by, [417]
rapid improvement, [438]
Photometry, stellar,[ 49], [420] [421];
of planetary phases, [245] [288]
of Saturn's rings, [299]
photographic, [421]
Photosphere, named by Schröter,[ 55];
structure, [151] [152] [164] [165]
Piazzi, star catalogues,[ 31];
parallaxes,[ 33]
motion of 61 Cygni,[ 35]
birth and training,[ 72]
5-foot circle,[ 72], [121]
discovery of Ceres,[ 73],[ 74]