|
HOW DO WE STUDY STARS?
|
Astrophysics is a difficult observational science. Why?
A ton of information about the Universe has been gleaned from optical observations, however, much more can be learned if we consider more than just optical light [objects in the Universe produce many other forms of radiation. Collectively, the overall radiation phenomenon is referred to as Electromagnetic radiation (EM radiation)]. Until recently the complete EM spectrum was not utilized because
that is, most types of EM radiation cannot penetrate the Earth's atmosphere. Today, because we can place telescopes into orbit about the Earth, we are able to study stars across many portions of the EM spectrum.
We also study stars using the matter (particles) they produce, e.g., the Solar Neutrino Experiment studies the particle emission from the Sun.
There are also experiments designed to detect the gravitational radiation from compact stars and other Celestial Objects.
The opening up of the EM spectrum and the study of other forms of Celestial emissions have substantially enhanced our understanding of Celestial objects of all kinds.