ASTR 1101 Lecture Notes - Lecture 1: De Revolutionibus Orbium Coelestium, Circular Motion, Lunar Phase

• School: Mount Royal University
• Department: Astronomy
• Course: ASTR 1101
• Professor: Mircea C Atanasiu

Document Summary

Lesson 11 - the sun"s surface, light matter and motion. The bright, visible surface of the sun. Sunspots dark, relatively cooler regions of the photosphere, produced by intense. Energy flowing outward from the sun"s interior travels as rising currents of hot gas and sinking currents of cool gas in the convective zone just below the photosphere. The doppler effect- is a change in the wavelength of a sound wave (pitch) due to the relative motion of the source and observer. Blueshift a doppler shift toward shorter wavelengths caused by a source approaching the observer. Redshift a doppler shift toward longer wavelengths caused by a source receding from the observer. Radial velocity (vr) the component of an object"s velocity that is directed away from or toward earth. Electric charges produce electric and magnetic fields. An atom is made of nucleus (protons, neutrons) and electrons; Isotopes have same number of protons but different numbers of neutrons.