... Sunspot Region 30 . ... The solar active region designated number 0030 is now appearing on the visible hemisphere of the closest star. Dwarfed by the Sun's disk, the group of sunspots which make up region 30 actually cover an enormous area -- nearly 10 times the size of Earth. ... The star cluster in RCW38 was hiding. ... The reason is that the open cluster is so young that it is still shrouded in thick dust that absorbs visible light. ... Proxima Centauri: The Closest Star . ...