...and so revealing the dark nucleus within. "But what are the spots 1 Many fanciful notions have been broached on this subject, but only one seems to have...its atmosphere, to which it appears to be subject."* The younger Herschel (Sir John) in his Treatise on Astronomy, thus speaks of the spots : " When viewed...

...exploded. "But what are the spots?" asks Sir John Herschell. "Many fanciful notions have been broached upon this subject, but only one seems to have any degree...its atmosphere, to which it appears to be subject." (" Outlines of Astronomy," p. 223.) "The sun," says Nicholl, the gifted professor of astronomy :n Glasgow...

...penumbra? ; and advances as a more probable theory, that " they are the dark, or at least-comparatively dark, solid body of the sun itself, laid bare to our...those immense fluctuations in the luminous regions of tho atmosphere, to which it appears to bo subject." Prof. Olmsted supports this theory by demonbtrating...

...rate of more than a thousand miles a day. " But what are the spots? Many fanciful notions have been broached on this subject, but only one seems to have...they are the dark (or, at least, comparatively dark) sojid body of the sun itself, laid bare to our view by those immense fluctuations in the luminous regions...

...conclusion from it 1 (What revolution is this ? What time required for a synodic revolution ? Illustrate.) dark, or, at least, comparatively dark, solid body...those immense fluctuations in the luminous regions of the atmosphere, to which it appears to be subject." Prof. Olmsted supports this theory by demonstrating...

...is as represented in Plate I. fig. 1. (389.) But what arc the spots? Many fanciful notions have been broached on this subject, but only one seems to have...its atmosphere, to which it appears to be subject. Kespecting the manner in which this disclosure takes place, different ideas again have been advocated....

...state of matter. They seldom last longer than six weeks. It appears probable that these spots are the dark solid body of the sun itself, laid bare to our...its atmosphere to which it appears to be subject. The sun has two motions : one direct in its sidereal path, — the other a revolution upon its axis,...

...But what are the spots? Many fanciful notions have becn broached on this subject, but only one secms to have any degree of physical probability, viz. that...Respecting the manner in which this disclosure takes place, different ideas again have becn advocated. Lalande (art. 3240) suggests, that eminences in the nature...

...seen, towards the borders of the visible disc. But what are the spots? Many fanciful notions have been broached on this subject, but only one seems to have...its atmosphere to which it appears to be subject. When tho spots are attentively watched, their situation on the disc of the sun is observed to change....

...As to what these spots really are many fanciful notions have been broached. One is that they are the dark solid body of the sun itself laid bare to our view through openings in its luminous atmosphere. Lalande suggests that eminences, in the nature of mountains,...