epsilon aurigae, airglow, celestial sphere, neutron radiation, illuminance, vorticity, photometry, umbral, ionisation, zodiacal light, magnifications, eclipsing binary, dephasing, quasiparticle, photoluminescence, emissivity, photometer, luminosities, arcsecond, coronagraph, nebular, penumbral, photosphere, sundog, advection, jovian, backscattering, nebulosity, irradiance, parallax, azimuthal, extragalactic, auroral, chromosphere, stereopsis, transmissivity, obliquity, magnon, earthshine, dipole moment, diffraction, cirrus, reflectance, fovea, cirrus cloud, spherical aberration, anisotropy, dipolar, gaussian, scintillation, photoelectron, illumination, annularity, redshift, axion, emittance, corona discharge, polarimetry, waviness, photocurrent, mimas, refraction, brightness, ecliptic, photoemission, absorbance, spectrometric, apertures, planetary nebula, altocumulus, radiometry, reflectivity, perihelion, gravitational interaction, coronal, periodicities, occultation, spectroscopic analysis, opacification, baryon, thermodynamic equilibrium, aurigae, directivity, galactic equator, blackbody, infrared radiation, kev, absorption coefficient, radiative, thermal equilibrium, cherenkov radiation, underexposure, anisometropia, hysteresis loop, isotherms, astrometry, circular polarization, orbital velocity, exosphere, retroreflector, oxyhemoglobin, hubble constant, darkening, retrogression, elevation, blackening, diminution, yielding, amelioration, blurring, submergence, weakening, eclipse, lack, prostration, quickening, sinking, slackening, unsteadiness, alleviation, brightening, curtailment