H_{2}/HI ratios
like when you're building a LEGO structure, and you add some new pieces, but still have some gaps to fill in
Technical definition
The ratio of molecular hydrogen (H_{2}) to neutral hydrogen (HI) gas in a galaxy.
like when you're building a LEGO structure, and you add some new pieces, but still have some gaps to fill in
The ratio of molecular hydrogen (H_{2}) to neutral hydrogen (HI) gas in a galaxy.