Quick, take a guess, we’ll wait….Did you guess planet-shaped pineapple pieces and NASA paperweights? Wow, you are really good at this.

Celebrity astrophysicist Neil deGrasse Tyson doesn’t just host Star Talk Radio, COSMOS, and drop cosmic nothings on Twitter, his day job is director of the Hayden Planetarium in New York City. In his office he conducts many of the interviews you enjoy on Star Talk, and collects an assortment of cosmically-themed tchotchkes.

In the video above from National Geographic, we get a brief tour of the oddities Tyson keeps among his many books. Who expected a Russian nesting doll with Sputnik on it? Dude really loves the universe.