a mount for holding a telescope that is easily adjusted for altitude and azimuth

the distortion of color around an image, common in refractor telescopes

a mount for holding a telescope in which the tube is attached to a shaft pointing to the celestial pole

a device used by astronomers to determine the time of day and time of year from shadows cast in sunlight

a telescope mirror molded over an open-celled structure to reduce the mirror’s weight

an extremely thin telescope mirror

an instrument used to locate a star’s position by measuring the angle the star makes with the horizon

a telescope made of a receiver and antenna that focuses, amplifies, and analyzes radio frequency waves from space

a telescope that uses a concave mirror to bring the light from an object to a focal point

a telescope that uses a lens to bring the light from an object to a focal point and then magnifies the light with an eyepiece lens

the ability to see detail in an image

a telescope mirror that consists of several smaller mirrors that fit together

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