One look at Neil deGrasse Tyson's office
, and it's clear that he's passionate about every aspect of the universe. So, while some of us like to leave work at work, it's no surprise that deGrasse Tyson never departs the Hayden Planetarium without a little piece of the cosmos dangling from his neck. His cosmic tie collection helps him "spread [his] love of the universe to others." What's more, one tie is even spaghetti sauce-proof—it's covered in space scenery, so if you spill something, he says, "it's just another nebula."
In the videos below, deGrasse Tyson describes his work bringing the cosmos to the public, then answers 10 questions about his life and work. Read more about him on his Secret Life homepage