Lecture-Tutorials for Introductory Astronomy provides a collection of 44 collaborative learning, inquiry-based activities to be used in introductory astronomy c

A new look at the first few seconds after the Big Bang—and how research into these moments continues to revolutionize our understanding of our universe Scient

At some time around 200 A.D., the Stoic philosopher and teacher Cleomedes delivered a set of lectures on elementary astronomy as part of a complete introduction

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Leave time for wonder. Walt Whitman's "When I Heard the Learn'd Astronomer" is an enduring celebration of the imagination. Here, Whitman's wise words are beauti