اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
Author: Jacoby, Harold, 1865-1932
Title: Practical Talks by an Astronomer
Contents: Navigation at sea -- The Pleiades -- The pole-star -- Nebulæ -- Temporary stars -- Galileo -- The planet of 1898 -- How to make a sun-dial -- Photography in astronomy -- Time standards of the world -- Motions of the earth's pole -- Saturn's rings -- The heliometer -- Occultations -- Mounting great telescopes -- The astronomer's pole -- The moon hoax -- The sun's destination.
Language: English
LoC Class: QB: Science: Astronomy
Subject: Astronomy
Release Date: Oct 29, 2016
Copyright Status: Public domain in the USA.
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