Artist rendition of your Parker Solar Probe All of these satellites have observed the Sunlight within the plane on the ecliptic, and so have only noticed its equatorial regions in detail. The Ulysses probe was released in 1990 to study the Solar's polar regions. It very first traveled to Jupiter, https://actionfocus.de/der-ultimative-leitfaden-zur-auswahl-der-perfekten-kinderwerkbank/