• table
• T-adaptor
• tail
• tail bands
• tail table
• take
• take-off weight
• taking
• Tal
• Talcott method
• talus slope
• tangent
• tangential acceleration
• tangential component
• tangential ellipse
• tangential plane
• tangential speed
• tangential velocity
• tank
• tape
• tape recorder
• tapering
• target
• target planet
• target simulator
• Tartu observatory
• taukappe
• Tauri stars
• Tauri variables
• Taylor triplet
• teaching of astronomy
• tear-drop effect
• technique
• technique of unfilled apertures
• techniques of astronomy
• techniques of data processing
• technology
• tectites
• teepee design
• teflon
• tele-compressor
• tele-extender
• telemetry
• telemetry channel
• telemetry system
• teleobjective
• telephoto advantage
• telescope
• telescope aperture
• telescope balance
• telescope beam
• telescope construction
• telescope counterweights
• telescope design
• telescope diameter
• telescope drive
• telescope-drive motor
• telescope-drive worms
• telescope driving
• telescope driving mechanism
• telescope-driving motor
• telescope driving system
• telescope finder
• telescope housing
• telescope, invention of
• telescope making
• telescope monitor
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