An Explanation of the Number of Visible and Invisible Stars in the Sky

In a recent episode of the PBS Digital Studios series It’s Okay To Be Smart, host Joe Hanson provides an explanation of the number of visible and invisible stars in the sky. With just the naked human eye there are 9,096 stars that are visible, but using tools like the Hubble Space Telescope, we can see dimmer and more distant stars and galaxies than we ever could unaided.