A spiral galaxy like the Milky Way contains stars, stellar remnants, and a diffuse interstellar medium (ISM) of gas and dust. The interstellar medium consists of 10â4 to 106 particles per cm3 and is typically composed of roughly 70% hydrogen by mass, with most of the remaining gas consisting of helium.
What do cardinals eat for food? Cardinals eat a variety of wild and feeder seeds, including sunflower, safflower and most other seeds in basic wild bird seed mixes. In warm seasons they also eat insects anâ¦d worms and feed their babies mainly an insectivore diet.
What They Eat. Voles prefer vegetation, including tubers, roots, your daylily bulbs and other favorites, grasses and herbaceous plants, including stems, foliage and flowers. They'll devour the roots and bark of trees and eat more seeds and grain during the cold months when other food is less plentiful.