telescope, spectrometer, photometer, imager, interferometer, spectroscopic, retroreflector, polarimetry, coronagraph, spacecraft, multispectral, astrometry, mass spectrometer, bolometer, infrared, astronomical telescope, radial velocity, monochromator, optical telescope, quasar, neutron, redshift, grond, epsilon aurigae, arcsecond, astronomers, gradiometer, spectroscopy, cryostat, scintillator, pulsars, cassini, gyroscopes, spectro, cosmic ray, radiometer, collimator, detector, osiris, photoelectric effect, photometry, attosecond, sciamachy, airglow, spectroscopic analysis, photodetector, spectrophotometer, huygens, cosmic microwave background, photon, magnetic monopole, themis, photometric, gamma ray, electron beam, orbiter, laser, exoplanet, eclipsing binary, infrared radiation, wavelengths, parahydrogen, electron accelerator, planck, astrophysical, femtosecond, lander, diffraction, ultraviolet light, spherical aberration, synchrotron radiation, dipole moment, lightwave, sensor, photomultiplier, corot, photoluminescence, satellites, baryon, antiproton, extragalactic, gamma rays, supernovae, ultraviolet, particle accelerator, colorimeter, nightglow, rubidium, gauss, reflectometer, deimos, andromeda galaxy, plasmon, mossbauer, photoemission, earthshine, synchrotron, comet, electron microscope, tomography, neutrino, maser, spectrographs, spectroscope, projector, eyepiece, microscope, spectrometers, propeller, camera, oscilloscope, pump, telescopes, accelerator, aerial, burner, 14, absorptiometric, accurate, anthropometric, ar, archaeomagnetic, argon, astrometric, bioelectrical, calorimetric, chronometric, coefficient, colorimetric, conductometric, coulometric, craniometric, cryoscopic, cytochemical, cytophotometric, densitometric

sound spectrograph, visible speech

coude system, coude telescope, mass spectrum, sound spectrograph, spectrographic

exposure, photo, photograph, prism spectroscope, spectroscope

spectrogram