The astrophysicist, whose new book, ‘‘Astrophysics for People in a Hurry,’’ was published this month by W.W. Norton & Company, sketched his answers in his living room with a Mont Blanc Meisterstück 146 fountain pen.
The astrophysicist, whose new book, ‘‘Astrophysics for People in a Hurry,’’ was published this month by W.W. Norton & Company, sketched his answers in his living room with a Mont Blanc Meisterstück 146 fountain pen.