Interesting little basics on understanding light spectrum; and spectral analysis. ie.
how light energy interfaces with the elements themselves.
light spectrum "energize or bind" elements along the spectrum. It's a complex and fascinating subject; that I don't fully comprehend or appreciate.
Cassiopeia and the brightest extrasolar radio source in the sky at frequencies above 1 GHz. The supernova occurred approximately 11,000
light-years away within the
Milky Way. It is estimated that light from the stellar explosion (supernova) first reached
Earth near the decade of 1690. The blast zone is about 10 light years across.
Explosions like this use hydrogen and helium to "create" the higher elements themselves though nuclear fusion. The original object, called the
progenitor, either collapses to a
neutron star or
black hole, or is completely destroyed. The peak optical
luminosity of a supernova can be comparable to an entire
galaxy before fading over weeks or months.
Colors representing the various metals (to an astronomer, if it's not hydrogen or helium, it's a metal) in the nebula formed from the explosion. Silicon is red, sulfur is yellow, calcium is green, and iron is purple. (Blue is the blast wave.)
aka; Run of the mill super nova explosion
. Lots of lower elements created here.