Happy Valentine's Day: A Postscript

Environmental & Science Education, Art & Environment, Miscellaneous

Ed Hessler

Earlier today I posted a biologically and earth science themed Happy Valentine's Day. 

Thanks to Astronomy Picture of the Day (APOD), I finally took a look up and out into the cosmos  to view the Heart Nebula, a mere 7,500 light years out, "toward the constellation of the mythological Queen of Aethiopia (Cassiopeia).

The explanation is about what shapes and excites the Heart Nebula.