NASA observed ‘Naked Sun’ for the last 15 days which was the longest span after 2010
 Source : News Bharati English  Date : 27-Mar-2017

Our massive star- Sun has been spotted ‘spotless’ for last 15 days as this is the rare phenomena. NASA has provide the images of our spotless Sun. The Sun is having its spotless day which is termed as ‘solar minimum’. This phenomena means that we are about to have a slightly colder Earth in coming days.

 What is the spotlessness of Sun?

Sun spots appear to the human eye like dark blots on the sun. They’re areas of increased magnetic activity and cooler temperatures (compared to the sun’s average 6000-degree Celsius heat, they’re a wintry 1500 degrees). NASA identified that there were no sunspots between March 6 and March 21. This event finished last Wednesday.  This phenomenon of solar minimum was noticed in April 2010.

"This is the longest stretch of spotlessness since the last solar minimum in April 2010, indicating the solar cycle is marching on toward the next minimum, which scientists predict will occur between 2019—2020," NASA officials wrote in a statement.

How this does affects us?

The solar cycle, like the lunar cycle, impacts our life on Earth. Heavy activity during solar maximums can lead to powerful solar flares and radiation storms, which can interfere with satellites and GPS’s. Many scientists even believe that the solar cycle affects our climate.

Judith Lean, a solar physicist at the U.S. Naval, has clarified and said, this would not change climate or weather. He added that sun’s brightness between the solar these two events has a moderate effect on climate in comparison to other things like greenhouses gasses etc.  The response time of climate change due to solar irradiance is very slow and may take longer than months. Space weather may change evidently with the spotless events, and solar magnetic field may reduce further.

Space weather will change markedly with the disappearance of spots and the diminished solar magnetic fields. Solar flares and coronal mass ejections, which are plumes of plasma unleashed by the sun, will be ever-so-rare, and the “weather” will generally be tranquil. However, it’s worth noting that even though solar storms become much less frequent toward the solar minimum, occurrences of strong, eruptive fields still do occur, but for short spates from rogue sunspot groups.