
The LEGO Ideas Astronomy theme focuses on sets that are scientific and space based projects such as real world builds like the NASA Curiosity rover to NASA Apollo Saturn V rocket as well as fantasy space projects like the Exo-Suit.
Astronomy consists of 5 sets that ran from 2012 to 2017. As of today,
21104 NASA Mars Science Laboratory Curiosity Rover is the most valuable Astronomy set with an estimated new/factory sealed value of $427.
Summary
Ideas Astronomy NASA Mars Science Laboratory Curiosity Rover set 21104 was released on January 10, 2014, retailing for $30, it has since been retired. New, unopened sets are valued at $427, while used sets sell around $109.
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