▁removed ). ▁ ▁When ▁first ▁opened ▁the ▁the ater ▁featured ▁one ▁of ▁the ▁first ▁Evans ▁& ▁S uther land ▁Dig ist ar ▁II ▁digital ▁graphics ▁project ors , ▁ 4 9 ▁random ▁access ▁slide ▁project ors , ▁three ▁video ▁project ors , ▁and ▁an ▁ 1 1 , 5 0 0 ▁W ▁sound ▁system . ▁An ▁upgrade ▁to ▁an ▁Evans ▁& ▁S uther land ▁Dig ist ar ▁ 5 ▁ful ld ome ▁video ▁system , ▁LED ▁c ove ▁light ing , ▁a ▁Dol by ▁ 5 . 1 ▁surr ound ▁sound ▁system ▁and ▁an ▁Ast ro FX ▁the ater ▁control ▁system ▁took ▁place ▁in ▁the ▁fall ▁of ▁ 2 0 1 3 . ▁Program s ▁are ▁offered ▁for ▁school ▁groups ▁and ▁the ▁public ▁throughout ▁the ▁year . ▁ ▁Observ atory ▁The ▁Cent enn ial ▁Observ atory ▁opened ▁in ▁May , ▁ 2 0 0 4 , ▁featuring ▁the ▁largest ▁fully ▁wheel ch air - access ible ▁public ▁teles cope ▁in ▁the ▁world ▁at ▁the ▁time ▁( since ▁su pers eded ). ▁ ▁It ▁houses ▁a ▁ 2 4 " ▁( 0 . 6 ▁m ) ▁R itch ey - Chr ét ien ▁f / 8 ▁computer - control led , ▁equ atorial ▁fork - mount ed ▁teles cope ▁under ▁a ▁ 2 0 ' ▁( 6 ▁m ) ▁d ome , ▁as ▁well ▁as ▁a ▁number ▁of ▁smaller ▁port able ▁teles cop es . ▁ ▁View ing ▁opportun ities ▁are ▁offered ▁throughout ▁the ▁year ▁to ▁both ▁the ▁public ▁and ▁school ▁groups . ▁