We typically think of the Oort cloud as scattered ice balls floating far from the sun, yet still tied to it gravitationally.

In this astrophotography guide, Josh Dury explains how he captures stellar images of the Milky Way, Full Moon and more The ...

John Kounios is a professor of psychological and brain sciences at Drexel University. He is co-author of The Eureka Factor: Aha Moments, Creative Insight, and the Brain (Random House, 2015) and ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...