Yeah, if it said "Georgium Sidus" (Named by Herschel for King George III) - it'd be from the mid-late 1700's.<br /><br />William Herschel has a bunch of stuff named after him. At least craters on Mars, the Moon, and Mimas (which he discovered). He discovered all kinds'a stuff, including infrared radiation.<br /><br />I believe it was Jerome Lalande that proposed the name "Herschel". But Bode (who has a whole freakin' Galaxy named after him! [M81]) put forth Uranus, god of the sky.<br /><br />What book is this that you have? I'd be *really* interested to know! The Brit's "Nautical Almanac" was the final well-documented hold-out that I'm aware of. We had a copy in college from 1842 that had it as "Herschel" but in 1855 the copy had it as "Uranus". An encyclopedia from the same period had it as "Uranus" already. (Ahhh, I can actually smell the "Stacks" as I write that...) I remember a quiz question on it, in fact.<br /><br />Herschel died in 1822, and traditionally names and discoveries don't get overturned until someone dies. So figure 1823 or probably later, but before 1850ish.<br /><br />I can't check further at the moment. Googling from the palmtop is painful and my memory is getting fallible. <img src="/images/icons/wink.gif" /> <div class="Discussion_UserSignature"> <p>.</p><p><font size="3">bipartisan</font> (<span style="color:blue" class="pointer"><span class="pron"><font face="Lucida Sans Unicode" size="2">bī-pär'tĭ-zən, -sən</font></span></span>) [Adj.] Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.</p><p><strong><font color="#ff0000"><font color="#ff0000">IMPE</font><font color="#c0c0c0">ACH</font> <font color="#0000ff"><font color="#c0c0c0">O</font>BAMA</font>!</font></strong></p> </div>