A giant turtle-shaped sunspot has been discovered by ALMA during its first solar observation It was
A giant turtle-shaped sunspot has been discovered by ALMA during its first solar observation
It was the first time ALMA attempted to make a solar observation and measure emissions from our closest star, along with its partner ESO.
Nupur Jha Nupur Jha January 18, 2017 14:33 IST
ALMA detects a turtle-shaped sunspot.ALMA (ESO/NAOJ/NRAO)
The Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope in Chile has discovered something stunning! A shadowy turtle shape has been spotted in the region just above the Sun's chromosphere!
The shape is double the Earth's diameter and was captured at a wavelength of 1.25 millimeters on 18 December 2015. Researchers are hoping they can now use the information to find out more about solar physics.
The ground-based telescope array usually searches for radio waves emitted by distant galaxies. This time, however, it detected waves emitted from the Sun's chromosphere. ALMA observed the radiowaves at 2.5 and 3 millimeter depths in the chromosphere.
More:
http://www.ibtimes.co.in/giant-turtle-shaped-sun-spot-has-been-discovered-by-alma-during-its-first-solar-observation-712709
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"Turtles all the way down" is a jocular expression of the infinite regress problem in cosmology posed by the "unmoved mover" paradox. The metaphor in the anecdote represents a popular notion of the theory that Earth is actually flat and is supported on the back of a World Turtle, which itself is propped up by a chain of larger and larger turtles. Questioning what the final turtle might be standing on, the anecdote humorously concludes that it is "turtles all the way down"......
