Page 513 - 89 history of astronomy_opt

ington Observatory had acquired the fine
26-inch refractor, and Asaph Hall searched
for satellites, concealing the planet’s disc to
avoid the glare. On August 11th he had a
suspicion of a satellite. This was confirmed
on the 16th, and on the following night a
second one was added. They are exceed-
ingly faint, and can be seen only by the
most powerful telescopes, and only at the
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