We spent 6-7 hours on average if you watch planetarium show only once. Sometimes, you might spend lesser if you skip the shows.
We spent an entire day.
About an hour. We would spend longer if my son was older. He is 2.5 years old and there isnt very much for him to do.
We spent about 4 hours there, I think that's all my six-year-old could handle. Never even made it into the planetarium.
I think I spent 3 to 4 with my boyfriend. If you have kids, I'm sure I probably spent 3 to 4 hours with my boyfriend. If you have kids, you will probably spend more time. Go as early as possible.
4-5 hrs
We spent about 5 hours here, but probably could have stayed longer.
I spent 6h between the museum and the Academy of Sciences
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