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? Cardinals are seasonal eaters, much like most songbirds, as they feed on insects during the summer and seed during the winter. Find out what cardinals usually eat with helpful information from an Audubon Society member in this free video on wild birds. Part of the Video Series: Wild Bird Food.
What Do Bats Eat? Do you know what do bats eat? Bats predominantly feed on fruits, insects, vertebrates, flower nectar, and blood. Amongst which insects nearly covers most of their diet in that 3/4th of the total bats make their living through eating insects. These insects embrace both flying as well as ground-living.