Mariner 10 Made use of a gravity help maneuver about Venus to regulate its orbit round the Sunlight—this enabled it for making more than one flyby of Mercury. All through its second flyby on the planet on October six, 2008, MESSENGER identified that Mercury's magnetic subject is usually very "leaky". https://apps.apple.com/de/app/merkur-spieleraum-online/id6477957809