Latest H I region Stories
Pioneering observations with the National Science Foundation's giant Robert C Byrd Green Bank Telescope (GBT) have given astronomers a new tool for mapping large cosmic structures.
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...
- A small wooded valley; a dell.
- The protecting weather-shed built around the entrance to a house.