cassini, kepler, huygens, themis, extragalactic, spectroscopic, cosmic microwave background, astrophysical, astrometry, minos, radial velocity, attosecond, photometry, exoplanet, astronomers, galaxies, planets, cosmic ray, spectrometer, axion, photometer, spectroscopy, supernovae, hubble constant, redshift, neutrino, polarimetry, herschel, spectroscopic analysis, cosmic rays, cosmos, phobos, astronomical telescope, epsilon aurigae, corot, quasar, comet, osiris, neutron star, coronagraph, telescope, celestial sphere, pulsars, proxima centauri, mesosphere, astron, celestial mechanics, lagrangian, magnetosphere, gamma ray, earthshine, eclipsing binary, jovian, johannes kepler, spacecraft, flyby, interferometer, mossbauer, antineutrinos, radiometer, auroral, photons, spectrograph, edwin hubble, heliosphere, luminosities, blackbody, orbits, nebulae, sciamachy, blackbody radiation, wavelengths, ecliptic, gradiometer, ejecta, protostar, lunar crater, positron, singularities, moonlet, enceladus, gamma rays, diffraction, altimetry, quantum mechanical, milky way galaxy, spectra, geoid, qcd, electron volt, harlow shapley, tycho brahe, airglow, omega centauri, christiaan huygens, hipparchus, orbiter, chromosphere, antiprotons, lutetia, grond, deimos, einstein, erasmus, hamilton, murray, wheeler, blair, cardinal, chancellor, cooper, fletcher, fr, newton, reid, robertson, robinson, taylor, wilson, archbishop, augustine, benson, wilhelm, fraunhofer, onedimensional, plank, dynamical, goethe, maxplanck, newtonian, ambipolar, collisionless, deterministic, dimensional, dimensionless, dirac, discrete, einsteinian, eulerian, georg, hydrodynamic, hydrodynamical

black-body radiation, blackbody radiation, planck's law, redetermine