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.
Try placing bird seed on a tray or platform feeder like the one pictured at right. It's important to keep the seed off the ground. White millet, Safflower and cracked corn are the most common seeds they eat. Try offering safflower seed and you'll also get Northern Cardinals eating at your feeders. For more information on seeds and photos of each, please see our Bird Seed Page.