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Astronomy I

The stars

Properties of stars Distance temperature brightness size mass
Closest star to the sun Proxima centaur I
Part of a triple star system Alpha centauri complex
Barnard star 1.8 pc away
Parallax Apparent shift of an object with respect to the background stars, distance in parsescs
Proper motion Real annual motion of stars in space, arc seconds per year,
Largest known proper motion Barnard star
Kirchoffs law The summation of the gas and types of spectral lines
Optical telescopes Gather light visible to human eye, sometimes other wavelengths
Objective lens Big lens to point at the object
Problems with Refracting telescopes Chromatic aberration
Chromatic abberation Defect of lens in which different colors are focused at different points
What does the spectrum of a star look like?
Electromagnetic radiation A certain way in which energy moves through space
Types of radiation Gamma, X-rays, ultraviolet rays, infrared light, and radio waves
Created by: RachelleM