# Project Hail Mary  Author:: Andy Weir ## Highlights > “Believe it or not, light has momentum,” I said. “It exerts a force. If you were out in space and you turned on a flashlight, you’d get a teeny, tiny amount of thrust from it.” ([Location 844](https://readwise.io/to_kindle?action=open&asin=B08FHBV4ZX&location=844)) --- Title: Project Hail Mary Author: Andy Weir Tags: readwise, books date: 2024-01-30 --- # Project Hail Mary  Author:: Andy Weir ## AI-Generated Summary None ## Highlights > “Believe it or not, light has momentum,” I said. “It exerts a force. If you were out in space and you turned on a flashlight, you’d get a teeny, tiny amount of thrust from it.” ([Location 844](https://readwise.io/to_kindle?action=open&asin=B08FHBV4ZX&location=844))