The Hubble Space Telescope has glimpsed the most distant single star it's ever observed, glimmering 28 billion light-years away. And the star could be between 50 to 500 times more massive than our sun ...
Astronomers reveal new insight into an iconic supernova remnant's evolution, structure and pulsar-driven growth over 25 years ...
Astronomer Robert Kirshner investigates some of the universe’s biggest questions: What happens when a star explodes? Is the universe still expanding? He recently added a new mystery to the list: Is ...