telescopes

Lenses for astronomers

Telescopes is the plural of telescope, an optical instrument that magnifies distant objects—stars, planets, birds, ships on the horizon.

Telescopes range from handheld spyglasses to massive observatory installations.

The verb telescope means to collapse sections into one another like the sliding tubes of a portable telescope, or more figuratively, to compress: The accident telescoped the front of the car.

Time or events can telescope, condensing what seemed long into something brief.

optics

refractor

Light-bending optical instrument

reflectorLight-redirecting surface
lensLight-focusing curved glass
mirrorReflective viewing surface

eyepiece · aperture · focal length · magnification · objective · focuser · mount · tripod · collimation · resolution

astronomy

observatory

Facility for celestial study

HubbleRenowned astronomer's surname
galaxiesGravitationally bound stellar assemblies
nebulaeInterstellar gas clouds

celestial · stargazing · exoplanets · black holes · constellations · astrophotography · deep sky · quasars · supernova · planetary

terrestrial

birdwatching

Observing wild avians recreationally

spotting scopeHigh-powered observation monocular
wildlifeUndomesticated natural organisms
surveillanceSystematic observation of subjects

landscape · panorama · observation · horizon · nature · sightseeing · hunting · stadium · safari · birders

navigation

sextant

Maritime angular measurement device

maritimeOf the sea
latitudeGeographic or personal freedom
longitudeEast-west angular distance

celestial navigation · meridian · transit · seafaring · nautical · horizon · bearing · spyglass · naval · sailors

telescopes

refractor

observatory

birdwatching

sextant

telescopes

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