OCR Text |
Show The Satellite of Neptune. M. Tissemnd has presented z report to the Paris Academy of Sciences concerning con-cerning some remarkable observations of the satellite of the planet Neptune, which was discovered in 18-17. The angle an-gle which the plane of the orbit of this satellite made at that dale wit h the ecliptic eclip-tic was about 00 degs., but t liisangle has now increased by at least ft clegs. The satellite moves round its principal in an opposite direction to lhal usually followed fol-lowed by other satellites, so that a question ques-tion might be raised whether in the course of lime this variation in the in-i in-i clinalion of the plane of its orbit might I not end in its movement around its principal prin-cipal becoming normal. M. Tisscrand show oil that ihis variation of inclination was due to the oblate or flattened condition con-dition of Neptune at its poles, and that it will complete its limit within a period of 500 year.!, ut the end of which time h will again be us it was in 1847. Scieu liliu American. |