Star-land; being talks with young people about the wonders of the heavens (1899)
Ball, Robert Stawell, Sir, 1840- [from old catalog] · Boston and London, Ginn & company · leaf 367
ll put together, theywould not be nearly so great as one of these nebulae. 354 STAR-LAND. Astronomers reckon up the various nebulae by thou-sands, but I must add that most of them are apparentlyfaint and uninteresting. A nebula is sometimes liableto be mistaken for a comet. The comet is, as I… … Fig. 86. — The Ring Nebula in Lyra, under Different TelescopicPowers. most powerful telescopes are employed in observingthese faint objects. I take this opportunity of showinga picture of an instrument suitable for such observa-tions. It is the great reflector of the Paris Observa-tory (Fig. 87).…
Astronomy
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