Glossaire beginning with T
- Telescope
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Observation instrument whose objective is a single or double lens, producing the image of the sky in a focus where it is observed with an eyepiece. Also: refracting telescope or refractor. Those instruments whose objective is a concave mirror are often also called telescopes, more precisely reflecting telescopes or reflectors.
- Telescope
- Observation instrument whose objective is a single or double lens, producing the image of the sky in a focus where it is observed with an eyepiece. Also: refracting telescope or refractor. Those instruments whose objective is a concave mirror are often also called telescopes, more precisely reflecting telescopes or reflectors.
- Tide
- Deformation or rupture of a solid celestial object under the gravitational influence of a massive nearby object. Tidal effects may fragment an asteroid or a comet nucleus passing near a massive planet.