Friday also sees a further three Magners League games taking place.
A buoyant Connacht welcome the Scarlets to the Sportsground, the scene of their historic recent victory over Munster.
Edinburgh will be hoping to stop Ulster claiming a 'season's double' over them when the two teams play at Murrayfield.
Meanwhile, Glasgow Warriors will be looking to stop the Newport Gwent Dragons run of away victories over them as the Warriors continue to push to be the top-placed Scottish side.
Round 10 wraps up on Saturday when Leinster welcome the Cardiff Blues to the RDS. The defending league champions will be hoping to continue the form that has seen them lose only once at the ground since October 2007.
MAGNERS LEAGUE - ROUND 10 FIXTURES:
Friday, January 9:
CONNACHT v Scarlets, The Sportsground, 6.30pm
Ospreys v MUNSTER, Liberty Stadium, 7.05pm (live BBC Wales/Setanta Sports Ireland)
Edinburgh v ULSTER, Murrayfield, 7.45pm (live Setanta Sports 1)
Glasgow Warriors v Newport Gwent Dragons, Firhill Arena, 7.30pm
Saturday, January 10:
LEINSTER v Cardiff Blues, The RDS, 7.30pm (live Setanta Sports 1/S4C)