The sun shrinks a teensy bit when it’s feeling active
Its radius decreases by 1 or 2 kilometers during periods of high solar activity
![Sun](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/06/060618_EC_sun-shrinking_feat.jpg?fit=860%2C460&ssl=1)
SOLAR SHRINKAGE The radius of the sun gets a smidge smaller during periods when the sun is most active, a new study reports.
Solar Dynamics Observatory/NASA