pretelescopic
telescopically
perspective glass
telescopy
first light
skytime
telescopic
teleotoscope
robodoc
radio observation
radiotelescopy
telescopical
astrotechnology
Dobsonian
telescopist
field glass
spyglass
glass
Galilean telescope
collimator
pole
astrograph
coronograph
dynameter
radiospectrometer
refractor
telestereoscope
Hubble
Newcomb
Sir Bernard Lovell
Lovell
Sir Alfred Charles Bernard Lovell
Simon Newcomb
dioptric
telescoping
phototelescope
telespectrograph
monocular
tailpiece
astrointerferometer
water telescope
drawtube
optical telescope
astronomical telescope
optical astronomy
zenith sector
photoheliograph
astrogeodesy
monoscope
stereoscopist