An abridgment of Smith's Illustrated astronomy (1850)
Smith, Asa · New York, Cady & Burgess · leaf 96
traordinary causes, have taken place on their surface. Q. What is supposed to be the cause of their disappearance ? A. They have probably ceased to be luminous. Q. How do astronomers account for the appearance of newstars ? A. Opaque bodies may have become luminous,or new suns may have been… … ILLUSTRATED ASTRONOMY. 69 LESSON XLVIII. Question. What do the milky way and the single stars thatare visible to the naked eye, including our sun, constitute ? Answer. They constitute an immense cluster, orfirmament, entirely distinct from the other clus-ters or nebulae of the heavens. Q. What is…
Astronomy, Juvenile and popular
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