Download General Astronomy PDF Book by Harold Spencer Jones. Soft Copy of Book General Astronomy author Harold Spencer Jones completely free.
Reviews of : General Astronomy by Harold Spencer Jones PDF Book
Inside this Book – The Librations. The statement that the Moon always presents the same face to the Earth is only approximately correct, for sometimes a little more of one portion of the surface and a little less of the diametrically opposite portion is seen. This phenomenon is called Libration and is due to a variety of causes. There are three principal librations to which reference may be made.
Inside this book –General Astronomy PDF Book by Harold Spencer Jones – The period naturally associated with the Moon, however, is its period of revolution with regard to the Sun, since it is this period which controls the phases. A lunar month may be defined as the period from new Moon to new Moon, or from full Moon to full Moon, i.e. from conjunction to conjunction, or from opposition to opposition. This period is also known as the Synodic revolution. It is longer than the sidereal period, on account of the eastward motion of the Sun amongst the stars which must be overtaken. Its mean length is 29 d. 12 h. 44 m. 2-87 s.
General Astronomy by Harold Spencer Jones PDF : eBook Information
- Full Book Name – General Astronomy
- Author of this Book – Harold Spencer Jones
- Language – English
- Book Genre – Non Fiction, Astronomy Books, Astrophysics Space,
- Download Format – PDF
- Size – 19.4 MB
- eBook Pages – 392
- Price – Free