Kelsey Johnson

A leading astronomer and gifted teacher takes readers on a wondrous tour of how science confronts the big questions—about the universe's origins, destiny, and fundamental nature—and how it contends with the limits of our knowledge. Humans have learned a lot about the world around us and the universe beyond. We have had powerful insights and created profound theories about the...

The perfect gift for any curious, space-loving kid! Explore the constellations with this guide to navigating the sky for ages 6 to 9. Over thousands of years, stargazers have noticed shapes in the stars, also called constellations. Different cultures have seen mythical animals and heroes within these constellations, and many travelers have used the stars as a guide for their...