Teide Observatory

Earth-based astronomers use special telescopes to study the Sun. They are housed in tall towers at high-altitude sites where interference from Earth's atmosphere is at a minimum. A moving mirror (heliostat) at the top of the tower reflects the sunlight into a fixed telescope. The light is directed to measuring instruments in underground rooms, kept cool because of the intense heat from solar radiation. The Vacuum Tower Telescope at the Teide Observatory (the tallest tower seen to the left) has the air removed from the tower to limit image distortion by the Sun's heat.

TEIDE SOLAR OBSERVATORY, TENERifE

the sun

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