Neil deGrasse Tyson whose new book, ‘‘Astrophysics for People in a Hurry,’’ was published this month, sketched his answers to our questions in his living room in this illustrated interview. | Video From The New York Times

This year’s season finale of StarTalk on National Geographic TV was Neil deGrasse Tyson's interview with Stephen Hawking. In memory of his passing, and in celebration of his life, we offer that episode for you here, now, commercial free. | StarTalk