The U.S. National Science Foundation Daniel K. Inouye Solar Telescope, the world's most powerful solar telescope, operated by the NSF National Solar Observatory (NSO) near the summit of Maui's ...

Sunspots are the most striking phenomenon of the solar magnetic field. After the invention of the telescope early in the 17th century, the Italian astronomer Galileo Galilei was the first to routinely ...

Since ancient times, the sun has been known as a giver of light and heat, a source of life. Plants are coaxed from the Earth by its rays, bringing spring, followed by bountiful harvests. The Earth ...

A narrow-band image of the Sun at a wavelength of λ=588.9nm - that of a well known solar sodium line also known as the “NaD line.” The image was acquired during recent first light efforts with the VTF ...