Armagh Planetarium is celebrating its 50th anniversary with a series of events, starting with a gala celebration of music to unveil new exhibitions and branding.
The week will also include a 'women in science' event and free entry on Friday afternoon.
Planetarium director Michael Burton also hosted special guest Dame Jocelyn Bell-Burnell, the highly-acclaimed astrophysicist credited with one of the most significant scientific achievements of the 20th century.
As a postgraduate student, Dame Jocelyn discovered the first radio pulsars in 1967. The discovery was recognised by the award of the Nobel Physics Prize.