&gt;A telescope on the moon could be larger due to the reduced gravity, and have a better view without the atmosphere.<p>Couldn&#x27;t a telescope in space be <i>even</i> larger, due to zero gravity?<p>Suppose we&#x27;re modifying the James Webb to make it lunar based, wouldn&#x27;t we need to add additional structural support in order for it to not collapse under lunar gravity? That would drive up the launch mass and thus cost.