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This plate presents the aspect of the heavens at the four seasons, dealt with in Chapters II., III., IV., and V. In each map of this plate the central point represents the point vertically over the observer's head, and the circumference represents his horizon. The plan of each...
This plate presents the aspect of the heavens at the four seasons, dealt with in Chapters II., III., IV., and V. In each map of this plate the central point represents the point...
2. Chapter 2There are few instruments which yield more pleasure and instruction than the Telescope. Even a small telescope--only an inch and a half or two inches, perhaps, in aperture--will...
3. Chapter 3If we stand on an open space, on any clear night, we see above us the celestial dome spangled with stars, apparently fixed in position. But after a little time it becomes clear...
4. Chapter 4The observations now to be commenced are supposed to take place during the second quarter of the year,--at ten o'clock on the 20th of April, or at nine on the 5th of May, or at...
5. Chapter 5We now commence a series of observations suited to the third quarter of the year, and to the following hours:--Ten o'clock on the 22nd of July; nine on the 8th of August; eight...
6. Chapter 6Our last half-hour with the double stars, &c., must be a short one, as we have already nearly filled the space allotted to these objects. The observations now to be made are sup...
7. Chapter 7In observing the stars, we can select a part of the heavens which may be conveniently observed; and in this way in the course of a year we can observe every part of the heavens...
8. Chapter 8The moon perhaps is the easiest of all objects of telescopic observation. A very moderate telescope will show her most striking features, while each increase of power is repaid...