Practical Astronomy With the Unaided Eye
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In our eReader you can find the full English version of the book. Read Practical Astronomy With the Unaided Eye Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Practical Astronomy With the Unaided Eye
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" It is now at its best position for observation as a morning star. Seen through the telescope the disc becomes smaller, and more fully illuminated until it again reaches " superior conjunction, " and is lost in the solar rays. The interval from conjunction to conjunc- tion superior conjunction to superior conjunction, or inferior to inferior is 584 days, and is known as the " synodic period " of Venus.
Venus at times is exceptionally brilliant, and the ignorant have from time to time regarded ...the planet as a return of the " star of Bethlehem, " or as a portent. The phases of the planet are not visible to the unaided eye, but may be seen in a small telescope. These SUN, MOON, AND PLANETS 83 phases were discovered by Galileo three centuries ago with the newly-invented telescope. As a telescopic spectacle Venus is one of the most exquisite in the heavens, but owing to its thick atmosphere and the difficulty of observing it, little is known of its physical constitution.
Mercury passes through the same series of changes as Venus in a shorter time, its synodic period being 116 days.
What to read after Practical Astronomy With the Unaided Eye?
You can find similar books in the "Read Also" column, or choose other free books by Hector Macpherson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
" It is now at its best position for observation as a morning star. Seen through the telescope the disc becomes smaller, and more fully illuminated until it again reaches " superior conjunction, " and is lost in the solar rays. The interval from conjunction to conjunc- tion superior conjunction to superior conjunction, or inferior to inferior is 584 days, and is known as the " synodic period " of Venus.
Venus at times is exceptionally brilliant, and the ignorant have from time to time regarded ...the planet as a return of the " star of Bethlehem, " or as a portent. The phases of the planet are not visible to the unaided eye, but may be seen in a small telescope. These SUN, MOON, AND PLANETS 83 phases were discovered by Galileo three centuries ago with the newly-invented telescope. As a telescopic spectacle Venus is one of the most exquisite in the heavens, but owing to its thick atmosphere and the difficulty of observing it, little is known of its physical constitution.
Mercury passes through the same series of changes as Venus in a shorter time, its synodic period being 116 days.
What to read after Practical Astronomy With the Unaided Eye?
You can find similar books in the "Read Also" column, or choose other free books by Hector Macpherson to read onlineMoreLess
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