How about getting him a constellation mug or a galaxy-themed tie? You could also consider gifting him a ticket to a nearby planetarium or a digital telescope that allows him to explore the stars from the comfort of your backyard. Another idea could be a personalized map of the stars, which highlights the position of the stars during important dates in your relationship (like your wedding day). If he's into reading, you could get him a selection of books on space exploration like "The Martian" or "Hidden Figures".
Or you can get him a star map with the date of your first kiss.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.