Where are the ionization nebulae predominantly located in the galaxy m51?

Within or on the edges of the spiral arms of the galaxy (Like the dust clouds, ionization nebulae are located primarily within or on the edges of spiral arms. This is because spiral arms are regions of active star formation.

This would be an open primary. a closed primary people can vote only prior to election day if the party if they are registered. independent voters can not participate. there is not a wide-open primary, but there is a semi-open primary.

Answer volcanic outgassing;