Electromagnetic radiation is the primary source of our knowledge of the cosmos. Its characteristics (e.g., speed and frequency) are briefly summarized in this chapter. At some frequencies, the radiation can penetrate the atmosphere and ground-based observations are feasible; at other frequencies the atmosphere is opaque and observations must be carried out from space. Particulate matter (e.g., cosmic ray protons and meteorites) also brings us information about the solar system and the Galaxy. In addition, neutrinos and gravitational waves carry information about the cosmos to astronomers on earth, though gravitational waves have yet to be detected directly.

Telescopes Mastery

Telescopes Mastery

Through this ebook, you are going to learn what you will need to know all about the telescopes that can provide a fun and rewarding hobby for you and your family!

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