Quantcast

Latest Balmer series Stories

bf01286ed27af03672d9f2b73915db6b1
2010-03-24 13:25:00

Astronomers have long known that in many surveys of the very distant Universe, a large fraction of the total intrinsic light was not being observed.


Latest Balmer series Reference Libraries

6_1e0e5cf9a2c3ce795f6505f978f2a7d42
2004-10-19 04:45:41

H II Region -- An H II region is an emission nebula associated with hot, young, blue stars, and star forming regions. H II, or singly-ionized hydrogen, is nebular gas ionized by ultraviolet light emitted by these hot, young stars of spectral type O and B. The sizes of H II regions are determined both by the amount of gas present, and by the luminosity of the O and B stars -- the more luminous the stars are, the larger the H II region can be. H II regions are found within the spiral...

More Articles (1 articles) »
Word of the Day
ecotone
  • A transitional zone between two communities containing the characteristic species of each.
The word 'ecotone' comes 'eco-' plus a Greek root meaning 'tension'.