'Black turtle' is twice as big as the Earth on the Sun.

The ALMA telescope reveals new details from the first observations of the Sun, including a giant black streak resembling a turtle swimming across the celestial surface.

The new image from the Atacama Large Millimeter / submillimeter Array (ALMA) telescope in Chile shows a black streak of tortoise-like shape on the Sun twice the size of Earth, Sun reported.

The black streak of the Sun's tortoise is twice as big as the Earth.(Photo: NASA).

Although ALMA is designed to observe the faintest objects in the distant universe, researchers have begun to use this powerful tool to understand the Sun over a 30-month period from 2014. it allows them to capture wavelengths of light with millimeters of accuracy emanating from the Sun's chromatogram, located just above the observable surface.

The black streak image of a giant tortoise was taken on December 18, 2015, using a No. 6 receiver at a wavelength of 1.25 millimeters.

"We are used to observing the Sun under visible light, but that can only tell us a lot about the active surface and the energetic atmosphere of the nearest star , " Tim Bastian, Astronomers at the National Radio Astronomical Observatory in Charlottesville, Virginia, USA, said. "In order to comprehensively understand the Sun, we need to study it through the entire electromagnetic spectrum, based on a detailed millimeter observation of ALMA".

Black streaks are a relatively cold area on the Sun's surface, so darker than the surrounding areas. The Sun operates over a period of 11 years with a high number of black streaks and storms during a period of intense movement, followed by a quiet period with few black streaks and fire storms.