April 17th, 2014
Waning Gibbous 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…

Seth Jarvis

Doughnuts vs. THE END OF THE WORLD

I’m betting doughnuts against the world ending in 2012. Any takers? The “2012″ disaster-pic opens Friday, and some folks are actually asking, “Is the world really going to end in 2012? Will the Earth’s magnetic field really reverse?  Is there…

Seth Jarvis

Cosmic Quiz Winner

This week’s cosmic quiz question was submitted by Daniel Wallace, who asked, “How do astronomers figure out the size of planets orbiting other stars (and even what their atmosphere is made of)?”