telescope
An optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses or curved mirrors, or both, by which rays of light are collected and focused in a way that produces a magnified image.
While commonly associated with astronomy, telescopes can also be used for terrestrial viewing (e.g., spotting scopes). The key function is to gather light and magnify distant objects.
Word relationships
- spyglass: An older, often smaller, handheld telescope.
Commonly confused with
- microscope: A telescope magnifies distant objects, while a microscope magnifies very small, nearby objects.
Word family
- telescopic (adjective): relating to a telescope; able to be extended or retracted like a telescope.
Collocations
- refracting telescope
- reflecting telescope
- radio telescope
- space telescope
- amateur telescope
Example sentences
- "Using a powerful telescope, amateur astronomers can observe the rings of Saturn and the moons of Jupiter." Describing astronomical observation.
- "The Hubble Space Telescope has provided breathtaking images of distant galaxies and nebulae for decades." Scientific research.
Memory hook
A TELEphone lets you hear from far away; a TELESCOPE lets you see from far away. TELE-SCOPE = see far.
When not to use
Do not use 'telescope' for instruments that magnify very small, close objects (e.g., a microscope).
Fun facts
- Galileo Galilei was one of the first to use a telescope for astronomical observations in the early 17th century.
- Radio telescopes detect radio waves emitted by celestial objects, allowing us to 'see' parts of the universe invisible to optical telescopes.
Explore more words
microscope, spectrometer, observation, compass, perspective, terrestrial
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