# astronomy

 What happens at higher temperatures? Objects emit more energy and the energy peaks at shorter wavelengths The continuous spectrum of an ideal object as a result of its temperature alone Thermal Radiation A planet moving faster nearer the sun Perihelion A planet moves slower when farthest from the sun Aphelion The geometric arrangements among the Earth, the Sun, and another planet Configurations When a planet is directly between Sun and the Earth Inferior Conjunction When a planet is on the opposite side of the Sun from the Earth Superior Conjunction The energy per photon depends on __________. the Frequency of the wave How shiny the color of a planet is Alvedo Name the Electromagnetic Spectrum from lowest to highest frequency: Radio WavesMicrowavesInfared RadiationVisible LightUV Raysx-RaysGamma Rays Which law says that the orbital period is related to the orbit's size (P2=a3) Kepler's 3rd Law What does p2=a3 mean? The square of a planet's sidereal period around the sun is directly proportional to the cube of the length of its orbit's semi major axis Where everything revolves around the Earth Geocentric Magnification is given by ratio of _______. telescope focal length (primary)eyepiece focal length (eyepiece) The amount of a Doppler Shift (blue or red) varies how? directly with approaching or reducing speed Where planets usually move slowly to the left (eastward) relative to background stars Direct Motion Where a planet seems to stop and back up for several weeks or months (westward relative to background stars) Retrograde Motion The blurring of objects as different colors of light being refracted by different amounts causing the different colors to have diferent focal lengths chromatic aberration Uses sensors to determine the amount of twinkling created by atmospheric turbulence Adaptive Optics The following are all characteristics of what?: A pair of widely-seperated telescopes Study the interface pattern Reconstruct original image/no atmospheric blurring Example: GSU CHARA Array on Mt. Wilson Optical Arrays The following are all characheristics of what?: Analyze the atmospheric blurring Adjust telescope optics to compensate Improve resolution of detail Adaptive Optics The following are all characheristics of what?: electronic detectors (CCD's) turn photons into an electric current more sensitive and easier to interpret than film; real time results Modern Detectors How is the GSU CHARA aray different from the Hubble Space Telescope? The GSU Array has more detail What all does a telescope do? collect more light resolve finer detail As planets gets smaller, densities get smaller because of ______. Why? Compression; because the inside of a planet would be compressed to the layers on top of it Where all the colors of the spectrum of an approaching source are shifted toward the short wavelength of the spectrum Blue Shift The change in direction as light travels from one medium to another Refraction The smallest angle that can be resolved is set by _____. Diffraction Effects The resolution of fine detail ideally improves with _______. Larger Aperture What are some disadvantages of large refractors? Lack of Lens SupportTwo curved SurfacesInterior Must be UniformChromatic Abberation Spectral lines originate in ________. energy changes of an atom's orbiting electrons Spectral lines are analyzed to ________. learn the chemical position of the absorbing or emitting matter What happens in the Doppler Effect? Relative motion effects the observed wavelength of frequency blue/redshiftsixe of shift proportional to speed A theory of the overall structure and evolution of the universe Cosmology The orbits are eclipses with the sun at one focus (described by semimajor axis and eccentricity) Kepler's 1st Law The time it takes a planet to make one complete orbit of the sun Sidereal Period AuthorAnonymous ID6775 Card Setastronomy Descriptionastronomt test 1 Updated2010-02-13T06:08:20Z Show Answers