"RELATED TOPICS: SOLAR SYSTEM | VENUSA comparison of the ionosphere of Venus under different solar wind conditions. // Credit: ESA/Wei et al. (2012)The European Space Agency???s (ESA) Venus Express has made unique observations of Venus during a period of reduced solar wind pressure, discovering that the planet???s ionosphere balloons out like a comet???s tail on its nightside.The ionosphere is a re" . . . .