... Stars . ... Cepheid variable stars have been known since the 18th century. ... Regularly brightening to a peak over days, weeks or months before fading these variable stars were remarkable curiosities to astronomers in past centuries.€а The term Cepheid is taken from the star Delta Cephei in the constellation of Cepheus, which was identified as variable€а in 1784 by the teenaged prodigy John Goodricke (1764-96). ... Tweets that mention Cepheids: Inconstant Stars which break the rules | ...

MINUTES OF THE EIGHTY FOURTH MEETING OF THE MANAGEMENT COMMITTEE OF ARMAGH OBSERVATORY AND PLANETARIUM HELD ON 17 NOVEMBER 2011 AT 10.30 A.M. IN THE CASSINI ROOM, ARMAGH PLANETARIUM Present: His Grace, The Most Reverend A.E.T. Harper (Chairman), Dr F. Byrne, Mr E. Donnelly, Professor A. Hibbert, Dr M. McKay, Professor R. Oudmaijer, ... MINUTES OF THE MANAGEMENT COMMITTEE OF ARMAGH OBSERVATORY AND PLANETARIUM 17 NOVEMBER 2011 PAGE 2 4. ... The report is due in 2011 November. ...