Charles C wrote:
> From the tutorial: "Glowing gases cast shadows"> > Now you've done it. Now I'm going to have to go play with a flashlight and> a candle!
It's one of the ways that astronomers use to identify the chemical
make-up of the cooler outerlayers of the sun.
Most of the time the shadows that are cast by glowing gases go unnoticed
because the glowing is the brightest (and often only) light source.
Regards,
John
