TY - JOUR T1 - On the Discovery of Four Additional Satellites of the Georgium Sidus. The Retrograde Motion of Its Old Satellites Announced; And the Cause of Their Disappearance at Certain Distances from the Planet Explained. By William Herschel, LL.D. F. R. S. JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 88 SP - 47 EP - 79 PY - 1798/01/01/ UR - http://dx.doi.org/10.1098/rstl.1798.0005 M3 - doi:10.1098/rstl.1798.0005 AU - Herschel, W. ER -