In case you desire more of this kind of metal, I would suggest utilizing the search functionality on Metal Archives. It enables you to search based on lyrical content. Here are the search results for phsyics[1], cosmology[2], and space[3], for example.
[1]http://www.metal-archives.com/search?searchString=physics&ty...
[2]http://www.metal-archives.com/search?searchString=cosmology&...
[3]http://www.metal-archives.com/search?searchString=space&type...