Related by context. Frequent words. (Click for all words.) 62 photometer 61 Gamma rays 59 near infrared NIR 59 GRB # 58 gamma ray 58 ionised 57 MeV 57 gamma rays 57 X ray emission 56 X ray beam 56 laser pulse 56 X ray beams 56 terahertz radiation 56 gamma ray burst 55 ionized gas 55 keV 55 visible wavelengths 55 infrared radiation 55 Crab Nebula 55 HiRISE camera 54 gamma radiation 54 XMM Newton 54 magnetar 54 synchrotron radiation 54 NASA Cassini spacecraft 54 Gamma ray bursts 54 National Synchrotron Light 54 radiotracer 54 microwave radiation 54 solar corona 54 Hawking radiation 53 pulsed laser 53 supernova explosion 53 X ray fluorescence 53 photonic crystal 53 infrared telescope 53 interferometry 53 laser pulses 53 superheated steam 53 ionisation 53 spectrographs 53 attosecond 53 X ray 53 Eta Carinae 53 ionizing 53 atomic nuclei 52 comet nucleus 52 alpha particles 52 x ray imaging 52 infrared 52 magnetars 52 galaxy cluster 52 radioactive tracer 52 diode laser 52 electron beams 52 Galaxy Evolution 52 microbubbles 52 fluorophores 52 particle beam 52 spectroscopic 52 electromagnetic 52 ultrasonic waves 52 ultraviolet UV light 51 frequency comb 51 supernova remnant 51 infrared laser 51 planetary nebula 51 particle detectors 51 femtosecond laser 51 collimator 51 interferometers 51 transmission electron microscope 51 photodetector 51 infrared wavelengths 51 scanning electron microscope 51 subatomic particle 51 WASP #b 51 optical microscopy 51 photon 51 ionize 51 polar vortex 51 CCD camera 50 infrared detectors 50 ion beam 50 multispectral 50 fluorescence imaging 50 meteoroid 50 ionization 50 Pulsed 50 positron 50 active galactic nuclei 50 optical wavelengths 50 infrared imaging 50 quasar 50 dispersive 50 ejecta 50 ultraviolet light 50 interferometric 50 Galileo spacecraft 50 extrasolar planet 50 shorter wavelengths