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Astronomy I
The stars
Question | Answer |
---|---|
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 |