Not a must, except the observatory which is pretty to see if you have never seen, it is a very small museum and the planetarium, although pleasant, is not so good (picture quality, theme etc)

The best museum I have ever been too! A must if you are in Wellington!!

Great place! Interesting and entertaining. For children and adults. Nice show, little bit childish movie setup, but a lot of info

Really good space museum and observatory. $12 per adult for the show and entry to the museum which was very informative