Annals of the Astronomical Observatory of Harvard College

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Hetcalf and Company, 1863 - Astronomy - 189 pages
 

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Page 170 - The general aspect of the greater part of the nebula is therefore that of an assemblage of curved wisps of luminous matter, which, branching outward from a common origin in the bright masses in the vicinity of the Trapezium, sweep towards a southerly direction, on either side of an axis passing through the apex, of the Regio Huygeniana, nearly in the angle of position 180°. About twenty of these convolutions have been distinctly traced, while others giving a like impression are too faint or too...
Page 276 - Mountain, illuminated by the sun just risen in the opposite quarter of the horizon, when it has been scarcely distinguishable in brightness from the rock in contact with it. The sun and moon being nearly at equal altitudes, and the atmosphere perfectly free from cloud or vapour, its effect is alike on both luminaries.
Page 3 - Radcliffe Catalogue of 6317 Stars, chiefly Circumpolar, reduced to the Epoch 1845.0 ; formed from the Observations made at the Radcliffe Observatory, under the Superintendence of Manuel John Johnson, MD, late Radcliffe Observer ; — with Introduction by Rev.
Page 53 - К L M N О P Q R S T и v W X Y Z...
Page 169 - Messieriana, and the region between the trapezium and the Proboscis Minor, including both these features, into four or five distinct wreaths, having a common initial direction in the angle of position 110°. The very bright nebulosity lying between the S. Gentilii, the trapezium, and the R. Subnebulosa, cannot be resolved into a regular structure, but three or four condensed spots, constituting the most brilliant part of the nebula close on the south-preceding side of the trapezium, are plainly distinguished...
Page 289 - ... Some interesting researches on the character of the great nebula in Orion have recently been made by Professor GP Bond, of the Cambridge (Mass.) Observatory. The feature to which Mr. Bond's attention has been particularly directed is the spiral of the principal masses of light in this nebula; or, more correctly, the tendency to an arrangement in elongated wisps or whirls, sweeping outward from the bright region of the Trapezium. These peculiarities, which constitute the leading features of this...
Page 3 - A Catalogue of 3735 Circumpolar Stars observed at Redhill in the years 1854, 1855, and 1856, and reduced to mean positions for 1855.0, by RICHARD CHRISTOPHER CARRINGTON.
Page 276 - The actual illumination of the lunar surface is not much superior to that of weathered sandstone rock in full sunshine. I have frequently compared the moon setting behind the grey perpendicular facade of the Table Mountain, illuminated by the sun just risen in the opposite quarter of the horizon, when it has been scarcely distinguishable in brightness from the rock in contact with it.
Page 169 - From the southern corner of the Regio Picardiana, and from those parts of R. Derhamiana and R. Huygeniana which lie near the Trapezium on its north-preceding and preceding sides, a number of narrow and bright branches diverge, their extremities tending also to the southpreceding direction. Some of these cross the R. Gentiliana and seem to merge together, forming a nebulous mass, which can be followed through an arc of 10
Page 168 - Orionis representing its appearance in the twenty-three-foot refractor of the Observatory of Harvard College. The feature to which attention was particularly directed was the spiral structure of the principal masses of light, or, more correctly, the tendency to an arrangement in elongated wisps or whirls, sweeping outward from the bright region of the Trapezium. A disposition of the nebulosity in some localities to radiate from the vicinity of the Trapezium, noticed in the memoir published by Professor...

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