The spacecraft will study the elusive solar poles and try to understand the mechanism behind the fearsome solar flares.
Senior Research Fellow at the Internation Centre for Radio Astronomy Research of The University Western Australia Luca Cortese tells SBS Italian why the Sun, though the closest star from us, is still a mystery for scientists.

The Atlas 5 rocket, which is carrying the Solar Orbiter observation satellite into space, sitting on the launch pad before launch on Cape Canaveral. Source: AAP Image