Everyone knows what is a compass, but do you know that the compass needle is not pointing to the true north pole, instead it is pointing to the magnetic north pole which is constantly changing. The latest episode of "Cool Met Stuff" will introduce this interesting phenomenon.
The video is now available on the "MyObservatory" mobile application and the Observatory's website for your viewing (programme is broadcasted in Cantonese).
Observatory's "Cool Met Stuff" channel (broadcast in Cantonese):
Broadcast schedule of various TV channels: