Elements of astronomy: accompanied with numerous illustrations, a colored representation of the solar, stellar, and nebular spectra, and celestial charts of the northern and the southern hemisphere (1875)
Lockyer, Norman, Sir, 1836-1920 · New York, D. Appleton and company · leaf 56
ance and the insufficient power ofour telescopes. This discovery is so recent that there hasnot yet been time to sort out the real from the apparentnebulae. We are obliged, therefore, still to accept as neb-ulae all formerly classed as such which up to this timehave not been resolved into stars.… … Fig. 21.—Great Nebtjxa of Orion. made, as more powerful telescopes were used? What inference was drawnfrom this ? 92. What has since been discovered respecting some of the nebulse ?93. Into how many classes may nebulas be divided ? Name them. 94. To which3 50 NEBULAE. 94. Irregular Nebulae.—Some of…
Astronomy
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