telescope
astrolabe
astronomical telescope
heliometer
telescopically
radiospectrometer
spyglass
radio astronomy
binoscope
radiotelescopy
radio reflector
terrestrial telescope
radio telescope
radio observation
SIGINT
coronagraph
first light
telespectroscope
astrointerferometer
spotting scope
teleotoscope
telespectroradiometer
solar telescope
comet-finder
telestereoscope
radio interferometer
optical astronomy
dynameter
theodolite
pole
Kepler
optical telescope
finderscope
telescopy
altazimuth
nocturlabe
ondoscope
light bucket
coronograph
astronomy satellite
robodoc
satellite navigation system
observatory
glass
monocular
field glass
telescopical
telescopist
wavemeter
radio source
Schmidt camera
triquetrum
telescopic
spectroheliometer
radiotelemeter
Schmidt telescope
Hubble
coude system
coude telescope
focuser
spectrohelioscope
radiograph
reflector
lithium-drifted silicon detector
Galilean telescope
astrometer
star tracker
astrograph
radioastronomer
focimeter
megameter
magnetometer
stereoscopist
spectromagnetograph
perspective glass
spectroheliokinematograph
geobarometer
rangefinder
absolute altimeter
refractor
telextender
very-long-baseline interferometry
SAO
radio brightness
tellurometer
water telescope
derotator
radioemitter