| http://www.w3.org/ns/prov#value | - Aiming the light sensor at the model star of the LEGO orreryThe only real problem we have had in the lab is parts falling off the orrery??? it???s easy to fix ??? you just put them back on??? it???s probably a problem because when we first built the two I couldn???t decide whether to glue them or not ??? I didn???t have the courage if it didn???t work we could never get the orrery apart.
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