As mentioned several times, astronomers
use a wide variety of tools. Most of these tools are
optical and electronic in nature and have been
designed to visualize and interpret specific
frequencies within the
electromagnetic spectrum. In
addition, some novel methods have been designed to
circumvent various initiations of examining specific
frequencies within the spectrum.
The following describe the
spectrum and its limits here on Earth. By combining
instrumentation both in space and on the surface, we
are able to study the entire spectrum.