The central region of #N44 | The intricate and colorful nebula is produced by the ionized gas that shines electrons and positively charged recombining, emitting a cascade of photons in a particular wavelength atomic nuclei. Such nebulae are called "H II regions", meaning ionized hydrogen, i.e. hydrogen atoms that have lost an electron (proton). Their spectra are characterized by the emission lines whose relative intensities carry useful information about the composition, temperature, and..
For more of the greatest collection of #Nebula in the Universe... For more of the greatest collection of #Nebula in the Universe visit http://ift.tt/20imGKa nebula nebulae nasa space astronomy horsehead nebula http://ift.tt/1Lj6mzV