Contents

31 May 2019
Vol 364, Issue 6443

About The Cover

Cover image expansion

COVER The Sun, as seen in ultraviolet light on 22 October 2014, near solar maximum in the 11-year solar cycle. In this image from NASA's Solar Dynamics Observatory, the largest sunspot observed in more than two decades erupts into space (white, center). The view has been rotated; south is at the top. Solar maximum is a time of many sunspots and strong solar storms, which can hurl dangerous charged particles at Earth. See page 818.
Image: NASA/SDO/LMSAL