The Big Bang - how the Universe Began

Question 1
a) Infrared Astronomy
Infrared Astronomy is a study of the Infrared Radiations emitted from celestial objects. All objects from trees, buildings on the earth to distant galaxies emit infrared radiation. The cosmic dust particles block the view of the visible universe such as the center of the Milky Way but these cosmic dust particles are transparent in the Infrared Radiation wavelengths. It is very significant for studying asteroids, comets, planetary satellites and interstellar dust clouds where stars are forming. …