Related by context. All words. (Click for frequent words.) 77 thin crescent moon 76 crescent Moon 75 waxing gibbous moon 75 thin crescent 75 waxing crescent 74 waxing crescent moon 74 waning crescent 73 waning gibbous moon 72 star Spica 72 waning gibbous 71 gibbous moon 70 SKY WATCH 70 constellation Aquarius 70 penumbral shadow 70 Comet NEAT 69 Pleiades star 69 Orionids 69 waxing gibbous 69 zodiacal light 69 waning crescent Moon 68 Eta Aquarid meteor shower 68 Quadrantid meteor shower 68 gibbous 68 Ringed Planet 67 Comet Machholz 67 starlike object 67 Orionid meteor shower 67 Comet Lulin 66 Lyrid meteor shower 66 waning crescent moon 66 celestial equator 66 aphelion 66 Jupiter Uranus 66 earthshine 66 Uranus Jupiter 66 Orionid meteors 65 lunar perigee 65 Comet Holmes 65 retrograde orbit 65 lunar crescent 65 Capricornus 65 Noctilucent clouds 65 Perseus constellation 64 Perseid meteor showers 64 umbral shadow 64 Geminid meteor showers 64 Comet Hartley 64 occultations 64 Pleiades cluster 64 celestial sphere 64 Perseid shower 64 planet Uranus 64 spiral galaxy NGC 64 constellation Virgo 64 constellation Leo 64 galaxy M# [001] 64 Cassini flyby 64 comet Lulin 64 Orionid Meteor Shower 64 occulted 63 Comet LINEAR 63 constellation Cygnus 63 Leonid Meteor Shower 63 Geminid meteor shower 63 predawn sky 63 penumbral lunar eclipse 63 constellation Taurus 63 Comet Hartley 2 63 Lunar eclipse 63 constellation Hercules 63 slender crescent moon 63 Geminid meteors 63 Jovian moons 63 constellation Cassiopeia 63 waxing moon 62 gaseous planet 62 constellation Carina 62 Partial lunar eclipse 62 constellation Andromeda 62 constellation Auriga 62 Mars Uranus 62 equinox occurs 62 constellation Scorpius 62 constellation Ursa Major 62 Perseids meteor shower 62 Quadrantids 62 Perseid Meteor Shower 62 moonrise 62 perihelion 62 Solar Dynamics Observatory 62 Epsilon Aurigae 62 GJ #b [002] 62 Saturn Cassini 62 innermost planet 62 Fomalhaut b 62 Leonid meteors 62 Leonid meteor showers 61 zodiacal constellations 61 planets Uranus 61 constellation Centaurus 61 Perseid meteor 61 Geminid Meteor Shower 61 outer corona 61 Venusian surface 61 ecliptic plane 61 Perseids Meteor Shower 61 Today waxing Virgo 61 Mercury Uranus 61 Meteor shower 61 perigee 61 Samuel Oschin Telescope 61 Comet McNaught 61 airglow 61 spacecraft Cassini 61 asterism 61 super perigee moon 61 Orion constellation 61 ringed planet 61 NASA MESSENGER spacecraft 61 constellation Bootes 61 #P/Churyumov-Gerasimenko 61 constellation Cetus 61 Upsilon Andromedae 61 prograde 61 Geminids 60 Leonid meteor shower 60 Saturn moon Iapetus 60 umbral 60 Taurids 60 retroreflector 60 Titan flyby 60 Gusev crater 60 autumn equinox 60 fainter meteors 60 Toutatis 60 elongated orbits 60 constellation Eridanus 60 aurorae 60 penumbral eclipse 60 Galilean moons 60 Saturn equinox 60 heavily cratered 60 constellation Perseus 60 planets orbits 60 Ulysses spacecraft 60 Triangulum 60 magnetotail 60 Nasa spacecraft 60 X ray afterglow 60 Total Lunar Eclipse 60 polar vortex 60 Epsilon Eridani 59 THEMIS Images 59 Galileo spacecraft 59 constellation Orion 59 Saturn moon Mimas 59 ESA Huygens probe 59 Geminid shower 59 Explorer WISE 59 mu Arae 59 rover Opportunity 59 occultation 59 galaxy NGC 59 lunar orbits 59 moonset 59 Andromeda Galaxy 59 rover Spirit landed 59 Planck satellite 59 constellation Gemini 59 KH #D 59 Jupiter Saturn 59 constellation Sagittarius 59 Isidis Planitia 59 supermoon 59 comet McNaught 59 sky darkens 59 sunward 59 moon Phobos 59 constellation Lyra 59 Neptune Uranus 59 constellation Aquila 59 Comet 9P/Tempel 1 59 Churyumov Gerasimenko 59 Lunar Reconnaissance Orbiter LRO 59 cometary debris 59 auroral displays 59 galactic equator 59 auroral oval 59 Delta Aquarids 59 red supergiant 59 Meteor Shower 58 spacecraft flyby 58 cosmic cannibal 58 Cassini Huygens spacecraft 58 Bug Nebula 58 Lyrids 58 Charon Pluto 58 Lunar Eclipse 58 elongated orbit 58 MESSENGER spacecraft 58 flyby Cassini 58 volcanic moon Io 58 sunlike star 58 Muchachos Observatory 58 asteroid Vesta 58 Syrtis Major 58 planet orbits 58 ecliptic 58 X ray pulses 58 emission nebula 58 Geminid 58 Saturn Jupiter Uranus 58 celestial fireworks 58 Upsilon Andromedae b 58 reddish glow 58 LCROSS spacecraft 58 Comet Halley 58 submillimetre wavelengths 58 shadowed craters 58 ringplane 58 constellations Cygnus 58 polar craters 58 Saturn moon Enceladus 58 galactic disk 58 Cassini spacecraft orbiting 58 Orion nebula 58 Virgo Cluster 58 Perseid meteors 58 Deep Impact craft 58 Messenger spacecraft 58 comet Tempel Tuttle 58 brightest meteors 58 Leonids meteor shower 58 Rover Opportunity 58 synchronous orbit 58 galaxy M# [002] 58 Eta Aquarids 58 exosphere 58 Cassini flybys 58 Perseid meteor shower 58 equatorial latitudes 58 arcminutes 58 circular orbit 58 coronal hole 58 Mars Neptune Uranus 57 Venus Neptune Uranus 57 unaided eye 57 Gamma Virginids 57 interacting galaxies 57 star Fomalhaut 57 Venus Uranus 57 Uranus Neptune 57 moon Ganymede 57 flyby spacecraft 57 infrared wavelengths 57 comets orbiting 57 backscattered 57 Martian moons Phobos 57 reflection nebula 57 sextile 57 axial tilt 57 Oceanus Procellarum 57 highly elliptical orbit 57 Comet Churyumov Gerasimenko 57 heliopause 57 Zeta Ophiuchi 57 Saturn rings 57 Geminids meteor shower 57 shadowy craters 57 Clouds obscured 57 constellation Serpens 57 arcsecond 57 Kepler 9c 57 Opportunity rover 57 annular solar eclipse 57 telescope Uranus 57 X ray wavelengths 57 spacecraft orbited 57 MG J# +# 57 Rosetta spacecraft 57 Eta Carinae 57 Saturnian 57 constellation Ophiuchus 57 gravity warps 57 Astronomically speaking 57 COROT 7b 57 shepherding spacecraft 57 star Proxima Centauri 57 lunar equator 57 smallest exoplanet 57 Planck telescope 57 Solar TErrestrial RElations Observatory 57 fist widths 57 partial lunar eclipse 57 planetary Transits 57 photosphere 57 Mars Jupiter Uranus 57 Jupiter Ganymede 57 Manhattanhenge 57 Orion Belt 57 rotational axis 57 Sensing Satellite LCROSS 57 Leonid meteor 57 Eridanus 56 Comet #P 56 whiz harmlessly 56 lunar eclipse occurs 56 moon Io 56 asteroid Steins 56 retrograde orbits 56 Orbiter LRO 56 STEREO spacecraft 56 NASA Cassini spacecraft 56 Venus Jupiter Uranus 56 constellation Monoceros 56 Saturn Enceladus 56 Fermi telescope 56 X ray emission 56 closest flyby 56 HM Cancri 56 HD #b [001] 56 WD5 56 Neptune Uranus Jupiter 56 GJ#b 56 Corot 9b 56 icy moons 56 SpaceWeather.com 56 Fomalhaut 56 lunar occultation 56 moons orbiting Saturn 56 ray Space Telescope 56 stellar occultations 56 Meteor showers 56 Winter solstice 56 distant galaxy 56 telescope eyepiece 56 NASA rovers Spirit 56 WISE infrared 56 WISE spacecraft 56 HD #b [002] 56 ultraviolet imaging spectrograph 56 Saturnian moon 56 outermost planets 56 pericentre 56 Rosette Nebula 56 auroral activity 56 coronal loops 56 Ring Nebula 56 Titan smoggy 56 Martian crater 56 Hyades cluster 56 annual Perseid meteor 56 lunar crust 56 hexagonal mirrors 56 sunspot cycle 56 gamma ray flares 56 orbital resonance 56 elliptical orbits 56 Leonid shower 56 TrES 4 56 XMM Newton 56 millisecond pulsar 56 moon Charon 56 Earth radii 56 annular eclipse 56 Relations Observatory STEREO 56 HD#b 56 visible wavelengths 56 gamma ray observatory 56 transiting planet 56 GA6 56 Ranging spacecraft 56 IBEX spacecraft 56 aspecting 56 P/# A2 56 silicate dust 56 Helix Nebula 56 Discovery undocked 55 ionized particles 55 Gamma Virginids shower 55 Mercury flyby 55 Mpc 55 arcseconds 55 sun glints 55 Autumnal Equinox 55 IRAS #-# 55 exo planets 55 Saturnian moon Titan 55 nightglow 55 equinox 55 emit X rays 55 Earth magnetotail 55 Crab Pulsar 55 WASP #b 55 comet orbit 55 Beehive Cluster 55 bedrock outcropping 55 Milky Way halo 55 constellation Pisces 55 solar corona 55 Dynamics Observatory 55 Comet Elenin 55 WISE telescope 55 thrilling stargazers 55 Leonids 55 tidally locked 55 Voyager spacecraft 55 AU Mic 55 Crab Nebula 55 Comet #P/Churyumov-Gerasimenko 55 Geminga 55 Martian orbit 55 NASA STEREO 55 Flyby 55 orbiting 55 Saturn outermost 55 submillimeter wavelengths 55 double helix nebula 55 aboard Taurus XL 55 HiRISE image 55 magnetic polarity 55 geoeffective 55 eccentric orbits 55 gaseous planets 55 Hale Bopp 55 sized planets orbiting 55 APXS 55 skywatchers 55 CoRoT #b 55 Shepherding Spacecraft 55 Lagoon Nebula 55 chromosphere 55 Enceladus flyby 55 comet nucleus 55 autumnal equinox 55 Perseid meteor shower skygazers 55 spherical halo 55 Saturn Uranus 55 Betelgeuse 55 Orientale Basin 55 tidal bulge 55 gravitational lens 55 Ultraviolet Imaging Spectrograph UVIS 55 energetic electrons 55 substorm 55 fainter objects 55 elliptical orbit 55 comet Hale Bopp 55 Neptune Jupiter 55 cosmological distances 55 cosmic ray flux 55 lensing galaxy 55 polar latitudes 55 COROT 55 Veil Nebula 55 supergiant star 55 Encke gap 55 stellar occultation 55 orbital eccentricity 55 Orbiter MRO 55 constellation Puppis 55 Omega Centauri 55 jovian 55 umbra 55 Lulin 55 Sky gazers 55 coppery red 55 GQ Lupi 55 luminous galaxies 55 telescopic observations 55 flyby 55 Perseids 55 infrared satellite imagery 55 SOHO spacecraft 55 Hellas Basin 55 Spring Equinox 55 Infrared Mapping Spectrometer VIMS 55 Earthshine 55 Monoceros 55 ultraviolet wavelengths 55 X ray telescopes 55 Earth ionosphere 55 HL Tau 55 Sojourner Rover 55 permanently shadowed craters 55 planets orbiting sun 55 rocky extrasolar planet 55 exoplanets planets 55 Vernal Equinox 54 circular orbits 54 Gliese #c 54 celestial spectacle 54 waitress Ingrid Sufan 54 orbital inclination 54 Corot 7b 54 Phoebe orbits 54 Trifid Nebula 54 Earth asteroid Itokawa 54 SIM PlanetQuest 54 Canis Major 54 infrared wavelength 54 NASA EPOXI mission 54 cluster NGC 54 planet Nibiru 54 sunlike stars 54 SIRTF 54 accretion disk 54 Foton spacecraft 54 brightest supernova 54 Serpens Cauda 54 exoplanetary 54 Cosmic Microwave Background 54 Carina constellation 54 Atlantis undocks 54 Iapetus Saturn 54 orbiting Saturn 54 intrinsic brightness 54 spring equinox 54 fireball streaking 54 exoplanet orbiting 54 lunar module Eagle 54 SINFONI 54 GJ #b [001] 54 Red Rectangle 54 Voorwerp 54 interstellar particles 54 orbiting Hubble Space Telescope 54 rover Spirit 54 comet flyby 54 periodic dimming 54 orbital velocity 54 Predator drone flies 54 Full Moons 54 exoplanets orbiting 54 twin rover Opportunity 54 Mössbauer 54 Lightning flickered 54 Chi Cygni 54 gave Aliodor headache 54 Mars Saturn Uranus 54 noctilucent clouds 54 Great Orion Nebula 54 Caloris Basin 54 Arches Cluster 54 nebulosity 54 Observatory SDO 54 submillimeter galaxies 54 GALEX 54 perigee moon 54 northern arctic plains 54 Delta Cephei 54 Galilean satellites 54 Venusian atmosphere 54 star Beta Pictoris 54 coyote howling 54 sundog 54 NASA Aqua 54 zodiacal constellation 54 Taurus Littrow Valley 54 constellation Aries 54 moon 54 lenticular clouds 54 Steins asteroid 54 moons Phobos 54 Methone 54 orbits Saturn 54 SN #A 54 Saturnian system 54 Andromeda galaxy 54 Herschel Space Telescope 54 inch Samuel Oschin 54 blue supergiant 54 planetary nebulas 54 ESA Rosetta 54 inhabitable planets 54 polarimetry 54 Kuiper belt objects 54 THEMIS spacecraft 54 Mars Odyssey spacecraft 54 Mars moon Phobos 54 copper impactor 54 reentry capsule 54 Doppler shifts 54 Eridani 54 Cepheus 54 Libra constellation Vogt 54 micron wavelengths 54 clouds scudding across 54 Martian equator 54 Cepheid variables 54 LORRI 54 pinkish glow 54 Saturn moon 54 irregularly shaped asteroid 54 orbiting observatory 54 constellation Hydra 54 Saturnian moons 54 Earth Asteroid 54 Giovanni Cassini 54 Mercury exosphere 54 Space ENvironment GEochemistry 54 barred spiral galaxy 54 Jupiter flyby 54 moon Mimas 54 Jupiter magnetosphere 54 skywatching 54 Comet Tempel Tuttle 54 Comet Tempel 1 54 constellation Lacerta 54 Heliospheric Observatory SOHO 54 Gravitational lensing 54 Shenzhou VI capsule 54 cosmic microwave radiation 54 AB Aurigae 53 planetary transits 53 globular cluster M# 53 Astronomers Find 53 Lunar eclipses 53 NASA Cassini 53 coronal loop 53 sodium atoms 53 Kuiper Belt Objects 53 spaceweather.com 53 CoRoT 53 Opportunity parachuted 53 CoRoT satellite 53 planet Gliese #g 53 constellation Piscis Austrinus 53 constellation Libra 53 Stardust mothership 53 Hubble orbits 53 planetary nebula 53 comet #P/Churyumov-Gerasimenko 53 moonlet 53 Cepheids 53 auroras 53 planet TrES 53 Infrared Thermal Imaging Spectrometer 53 moon Deimos 53 geomagnetic activity 53 heliosheath 53 faint meteors 53 infalling gas 53 planetarium dome 53 NASA Stardust spacecraft 53 WISE mapped 53 filamentary structure 53 redshifted 53 VIRTIS 53 GEochemistry 53 lunar eclipse 53 optical wavelengths 53 Trifid 53 constellation Ara 53 NASA Cassini orbiter 53 shuttlecock shaped capsule 53 meteor streaks 53 solar prominences 53 produce colorful auroras 53 annular eclipse occurs 53 Aqua satellite 53 GRB #B 53 asteroid Eros 53 circumstellar disk 53 mesosphere 53 solar radii 53 Venusian 53 CBS miniseries Comanche 53 Tempel Tuttle 53 Saturn magnetosphere 53 comet 53 celestial object 53 Henize #-# 53 Fornax cluster 53 foreground galaxy 53 gamma ray emission 53 asteroid Itokawa 53 ESO PR 53 orbiting telescope 53 AKARI 53 faint smudge 53 Saturn moons Titan 53 glows orange 53 Milky Way Galaxy 53 magnetospheric 53 Cancri 53 cumulus cloud 53 Cabeus crater 53 inky blackness 53 Goldilocks planet 53 BP Piscium 53 HD# [002] 53 Earth axial tilt 53 BLG #Lb 53 twin Voyager spacecraft 53 Espenak 53 total lunar eclipse 53 field Infrared Survey 53 Orionid 53 Cerro Paranal 53 moon Enceladus 53 Interferometer VLTI 53 Pancam 53 albedo reflectivity 53 electric ion propulsion 53 Helix nebula 53 zodiac constellations 53 sun corona 53 astrometry 53 vernal equinox 53 permanently shadowed regions 53 Ius Chasma 53 Sagittarius dwarf galaxy 53 Shackleton crater 53 Endurance crater 53 stationary lander 53 interstellar dust 53 spiral galaxy 53 OGLE TR #b 53 Canis Minor 53 distant supernovae 53 Chilean Atacama Desert 53 reddish hues 53 Mars Reconnaissance Orbiter MRO 53 HARPS spectrograph 53 spacecraft orbiting 53 robotic explorer 53 Cassini Huygens Mission 53 CoRoT 7b 53 NASA Spacecraft 53 Beta Pictoris b 53 Scorpius 53 Spitzer infrared 53 reddish orange hue 53 trine 53 Mauna Kea Hawaii 53 Imaging Spectroradiometer MODIS 53 geomagnetic field 53 transiting exoplanet 53 starscape 53 orbits 53 similar northing 53 Atlantis glided 53 Hubble Space Telescope HST 53 Orion Nebula 53 moons orbiting 53 equatorial bulge 53 Oort Cloud 53 Cerro Pachon 53 impactor spacecraft 53 collimated 52 gamma ray burst 52 Rossby waves 52 Jovian moon 52 coronagraph 52 solar minima 52 moons circling 52 astronomical tides 52 young symoon@joongang.co.kr 52 telescope 52 Arecibo radar 52 Vastitas Borealis 52 Earthlike planets 52 Kepler spacecraft 52 spiral galaxy Messier 52 comet Churyumov Gerasimenko 52 Asteroid Belt 52 THEMIS Image 52 Hanny Voorwerp 52 NASA Kepler telescope 52 Otherwise partly cloudy 52 orbiting observatories 52 orbit insertion 52 HiRISE camera 52 nightside 52 repeated fly bys 52 Corona Borealis 52 New Horizons spacecraft 52 ESO VLT 52 Transiting 52 NASA Voyager spacecraft 52 Kepler Space Telescope 52 martian soil 52 Gliese #e 52 olivine mineral 52 eclipsing binary 52 extrasolar planet 52 Moderate Resolution Imaging 52 Galaxy Evolution 52 frozen sunless 52 star Gliese 52 orbiter Cassini 52 emitting gamma rays 52 Iapetus 52 Cassini orbiter 52 Titan flybys 52 earthlike planets 52 Beta Pictoris 52 substorms 52 countdown dress rehearsal 52 Martian dust 52 Mars Orbiter 52 Mars Uranus Neptune 52 Butterfly Nebula 52 Shuttle undocks 52 SGR J# 52 coronal holes 52 Earth magnetosphere 52 Tau Ceti 52 nebulas 52 Arabia Terra 52 linearly polarized 52 icy moon Enceladus 52 crescent moon 52 Deep Impact eXtended Investigation 52 planet HD #b 52 Palomar Observatory 52 infrared telescopes 52 meteoroids 52 Saturn moons Enceladus 52 Pleiades 52 RXTE 52 interstellar dust clouds 52 infrared spectrograph 52 NASA Spirit rover 52 Meteor Showers 52 Surface Composition Spectrometer 52 VY Canis Majoris 52 Rosetta orbiter 52 wispy clouds 52 Cassini 52 NASA Lunar Reconnaissance 52 celestial phenomena 52 glowed eerily 52 gravitational tides 52 Stardust spacecraft 52 towering cumulus clouds 52 elliptical galaxy NGC 52 galaxy cluster 52 equinoxes 52 perilune 52 twin suns 52 inky sky 52 moons Io 52 Horsehead Nebula 52 ESA SMART 52 Extrasolar Planets 52 sidereal 52 accretion disks 52 sky gazers 52 faint glow 52 Cancri e 52 starless sky 52 probe Chang'e 52 moon Titan 52 midlatitudes 52 Composite Infrared Spectrometer 52 comets asteroids 52 NASA Opportunity rover 52 silvery balloon hurtling 52 ESO Very Large Telescope 52 asteroid flyby 52 NGC #A 52 lunar highlands 52 sunspot numbers 52 comet Hartley 2 52 interstellar dust grains 52 supernova SN 52 V# Puppis 52 Imaging Spectroradiometer MODIS instrument 52 absorbs photons 52 NASA LCROSS 52 Valles Marineris canyon 52 aurora 52 Sombrero Galaxy 52 orbiting Cassini spacecraft 52 moonless sky 52 starlit sky 52 MESSENGER MErcury Surface 52 Achernar 52 microlensing 52 smoggy atmosphere 52 autumn equinoxes 52 MUFON Case # 52 lobate scarps 52 THEMIS satellites 52 Patchy frost 52 planets comets 52 soared majestically 52 Ranging MESSENGER spacecraft 52 Undocking 52 Shackleton Crater 52 radial velocity 52 gravitational interaction 52 Scattered flurries 52 Solar Terrestrial Relations 52 electron flux 52 polar mesospheric clouds 52 Kepler Telescope 52 planet WASP #b 52 diffuse aurora 52 infrared observatory 52 YOUR HOROSCOPE 52 Puppis 52 spacecraft Chandrayaan 1 52 Endeavour Crater 52 recurrent coronal hole 52 V# Mon 52 Caloris 52 fissure eruption 52 extrasolar 52 extrasolar planets orbiting 52 Mini TES 52 belched ash 52 CAPE CANAVERAL Shuttle Discovery 52 VLTI 51 circumstellar disks 51 HARPS spectrograph attached 51 Field Infrared Survey 51 Shuttle Atlantis blasts 51 wispy cirrus clouds 51 six wheeled rover 51 orbited Jupiter 51 Sagittarius #.#-#.# 51 Olympus Mons 51 Sun synchronous orbit 51 blazars 51 nebulae 51 RS Ophiuchi 51 Thick smoke obscured 51 Herschel Space 51 stratus clouds 51 orbiting spacecraft 51 lunar orbiter Chang'e 51 planet magnetosphere 51 Ontario Lacus 51 HIRES spectrometer 51 giant elliptical galaxy 51 brightest comet 51 # Apophis 51 huge fireballs exploding 51 entered lunar orbit 51 Shuttle Discovery blasts 51 preset orbit 51 protoplanets 51 moon Iapetus 51 GZK cutoff 51 asteroids comets 51 Cosmic Microwave Background CMB 51 KAGUYA 51 Pluto Uranus 51 IRC +# 51 amateur astronomers peering 51 Antennae Galaxies 51 celestial phenomenon 51 Elenin 51 coronal mass ejections CMEs 51 cratered highlands 51 Kepler #b 51 Martian terrain 51 obscuration 51 Super Earths 51 constellation Cepheus 51 refurbished Hubble Space 51 Mimas 51 aperture telescope 51 lunar orbiter Chandrayaan 51 Spectrograph 51 Keck telescope 51 Viking orbiters 51 relativistic particles 51 Mars Odyssey orbiter 51 Convection Rotation 51 Astronomy buffs 51 P Churyumov Gerasimenko 51 Diviner 51 helium atoms 51 microlensing events 51 wavelength infrared 51 Proxima Centauri 51 comet Wild 51 Clearing skies 51 constellation Fornax 51 constellation Vulpecula 51 Thick smoke drifted 51 Exoplanets 51 Express orbiter 51 Aurora borealis 51 midge hatches 51 Martian southern hemisphere 51 imaging spectrometer 51 CMB radiation 51 Keck Interferometer 51 inner Oort Cloud 51 partial eclipse 51 radiative cooling 51 Victoria Crater 51 Pluto Charon 51 Heterodyne Instrument