Elements of astronomy ... with explanatory notes, and questions for examination (1855)
Brocklesby, John, 1811-1889 · New York, Farmer, Brace & co. · leaf 322
greatest, andthe most potoerful of any that has ever been constructed. Give instances of planetary nebula? What is said respecting double nebula v.nA spiralnebula ? What are irregular nebula 1 27 314 STARRY HEAVENS. The most splendid of this class is the nebula in thesword-handle of Orion. It… … NEBULA OF ORION. tions are shown as they have been delineated by Sir JohnHerschel. 794. Their. Constitution. Stellar clusters and nebulashave usually been regarded as distinct classes of celestialobjects; the former consisting of groups of stars, eithervisible to the naked eye or through the…
Astronomy
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