September 18th, 2014
Waning Crescent Moon
moon
Seth Jarvis

Cosmic Quiz: Why can’t light escape a Black Hole?

This week’s Cosmic Quiz question comes from James Sylvester, who asks, “If the speed of light is the highest attainable speed, why can’t it escape a black hole?” First, a few words about the speed of light, which is indeed…

Seth Jarvis

Cosmic Quiz: Supermassive Black Holes

This week’s Cosmic Quiz winner is Carina Wytiaz, who asked, I’ve heard that all galaxies have a black hole at the center. Does our galaxy have a black hole? You heard correctly, Carina.  Astronomers have found evidence that all galaxies…