It perhaps is the eeriest the sun has ever looked. NASA has displayed these amazing images showing the ‘pumpkin sun’ just in time for Halloween. The image were captured on October 8th, and combines together two discrete wavelengths normally seen in gold and yellow to generate the mind-boggling effect.
The active regions look brighter as those are the spots that emit more light and energy — ‘markers of a strong and tangled cluster of magnetic fields floating in the sun’s atmosphere, the corona,’ Nasa said. They expose to view storms and flares on the surface. Solar flares tend to damage satellites and have a massive financial cost. It poses no danger to the astronauts because of the comparatively low orbit of this manned mission. They do have to worry about mounting exposure during space walks.
The charged particles are also a peril for airlines because they get to disturb the Earth’s magnetic field. Enormous flares can even generate currents within electricity grids and devastate energy supplies. If we look at it from an aesthetic standpoint – the auroras are enhanced. Geomagnetic storms are nowadays more disruptive because we rely more on technical systems that can be affected by electric currents.
Researchers have sighted ‘holes’ as a result of the activity in the past. A dark square on the sun, called the ‘coronal hole, is a region where solar wind is streaming out of the sun at blazing speeds. A coronal hole is a large area in the corona which is not so dense and is a lot cooler than its surrounds. It appears to be dark in intense ultraviolet light as there is less material to emit in these wavelengths. Such holes can materialize at any time of the solar cycle however they usually appear during the declining phase of the cycle.
Coronal holes happen when the Sun’s magnetic field is unbolted to cosmic space. Conversely, in areas where the solar magnetic fields loop back to the Sun creating arches, x-ray and UV images show bright regions. The brightest spots in the images are usually at the top of the magnetic loops or arches.