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With a conventional telescope, an extremely dark filter at the opening of the primary tube is used to reduce the light of the Sun to tolerable levels. Since the full available spectrum is observed, this is known as "white-light" viewing, and the opening filter is called a "white-light filter".
Solar telescopes often have multiple focal lengths, and use a various combination of mirrors such as coelostats, lenses, and tubes for instruments including spectrographs, cameras, or coronagraphs. There are many types of instruments that have been designed to observe Earth's Sun, for example, in the 20th century solar towers were common.
The Dunn Solar Telescope helps astrophysicists worldwide better understand the Sun and how it affects Earth. Completed in 1969, the telescope was upgraded with high-order adaptive optics in 2004 and remains a highly versatile astrophysical observatory that serves as an important test platform for developing new instrumentation and technologies.
The Daniel K. Inouye Solar Telescope (DKIST) is a scientific facility for studies of the Sun at Haleakala Observatory on the Hawaiian island of Maui. Known as the Advanced Technology Solar Telescope (ATST) until 2013, it was named after Daniel K. Inouye, a US Senator for Hawaii. [1] It is the world's largest solar telescope, with a 4-meter ...
A new solar telescope in Hawaii has released a series of images of the sun that peer inside the depths of its sunspots and so-called "quiet regions." The sun may be close to 94 million miles away ...
HMI takes high-resolution measurements of the longitudinal and vector magnetic field by viewing the entirety of the Sun's disk, with emphasis on various concentrations of metals in the Sun; specifically it passes the light (the variety of usable frequencies of which are centered on the solar spectrum's 617.3-nm Fraunhofer line) through five ...