Bombs placed by Andreas Baader and Gudrun Ensslin explode at midnight in 2 department stores in Frankfurt-am-Main; they are later arrested and sentenced for arson. And the premier of 2001: A Space Odessy in Washington D.C.
A possible word for space science ending in -try would be rocketry. Rocketry relates to how rockets work, and rockets are the only thing currently used to travel through space. Rocketry also ends in the suffix -try, so rocketry is a possible word.
Space contains vacuum (nothing). In a vacuum, nothing moves, not even atoms. Because of this, the temperature in space is 0 kelvins (-273.15 degrees celsius). Space is also continually expanding, therefore never ending.