After a certain time I see
them come back again where I saw them first."
"Oh, I should like to see the spots on the sun!" said Daisy.
"You said they were holes in the curtain, sir?"
"Yes."
"What curtain?" said Preston.
"You are not a philosopher," said the doctor.
"How long does it take them, — the spots, — Dr. Sandford, to
go round and come back again?"
"A little more than twenty-five days."
"How very curious!" said Daisy. "I wonder what it turns round
for — the sun, I mean?"
"You have got too deep there," said the doctor. "I cannot tell
you."
"But there must be some reason," said Daisy; "or it would
stand still."
"It is in the nature of the thing, I suppose," said Dr.
Sandford; "but we do not fully know its nature yet. — Only
what I am telling you."
"How came people to find these things out?"
"By watching — and experimenting — and calculating."
"Then, how big is the sun, Dr. Sandford?"
"How big does it look?"
"Not very large — I don't know — I can't think of anything it
looks like."
"It looks just about as big as the moon does."
"Is it just the same size as the moon? But Dr. Sandford, it is
a great deal further off, isn't it?"
"Four hundred times as far.
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