http://www.astro.oma.be/en/information/getting-to-the-observatory/How to get there to IASB-BIRA (ROB/KMI)
FROM THE CENTRAL STATION
At the Brussels central railway station take bus 38 of the STIB/MIVB in the direction 'Héros/Helden' Get off at the stop 'Houzeau'
From there onwards follow the road up the slope to the Observatory (+/- 5 min. walk)
FROM THE SOUTH STATION
Take Tramway route 4 direction P STALLE destination STALLE P. You arrive at stop HEROS (15 min.)
Walk to stop HEROS for transfer.
Take Bus route 43 direction OBSERVATOIRE.
FROM ST.-JOB STATION
From this station you will have to walk 10 min.:
Follow the "avenue J.P. Carsoel", the "avenue de mercure" and the "avenue circulaire" till you are in front of the main entrance.
One can access this station from North Station and is on the Mechelen-Halle line.