Running Lights: Did Expelled Stars Re-Ionize the Ancient Universe?
Hot stars booted out of their galactic homes may be responsible for creating the conditions that led to today's universe
Stories by Ken Croswell
Iron in the Fire: The Little-Star Supernovae That Could
Exploding white dwarf stars and an unexpected abundance of iron explain the chemistry of a unique star cluster
The Periodic Table of the Cosmos: 100 Years of the Hertzsprung-Russell Diagram
A simple diagram, which celebrates its centennial this year, continues to serve as the most essential conceptual tool in stellar astrophysics
