Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... The theory is known as the Grand Tack as according to it, during the first 10 million years of the Solar systemтАЩs existence Jupiter migrated inwards toward the Sun before turning and coming back, sweeping away all debris that fell into its path. ... Another widely-accepted theory of the formation of the Solar System, the delightfully-named Nice model neatly ties in with the Grand Tack theory as they both support each other. ...

MINUTES OF THE EIGHTIETH MEETING OF THE MANAGEMENT COMMITTEE HELD ON 21 JUNE 2010 AT 10.30 A.M. IN THE CASSINI ROOM, ARMAGH PLANETARIUM Present: His Grace, the Most Reverend A.E.T. Harper, (Chairman), Professor R. Oudmaijer, Professor A. Hibbert, Mr S. Shields, Professor P. Dufton, Mr A. Peoples, Mrs P. Wilson, Mr E. Donnelly and Professor M. Merrifield (by telephone link) Dr F. Byrne, Professor T. Ray and Archdeacon R. Hoey ... MINUTES OF THE MEETING HELD ON 12 FEBRUARY 2010 2.1. ...