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Juno
Juno spacecraft
Launch vehicle Atlas V
Launch date 2011 August

5

Object(s) Earth & Moon
Jupiter


The Juno mission was launched on 05 August 2011 to study Jupiter from polar orbit for approximately one year beginning in 2016. The primary scientific objectives of the mission are to collect data to investigate: (1) the formation and origin of Jupiter's atmosphere and the potential migration of planets through the measurement of Jupiter's global abundance of oxygen (water) and nitrogen (ammonia); (2) variations in Jupiter's deep atmosphere related to meteorology, composition, temperature profiles, cloud opacity, and atmospheric dynamics; (3) the fine structure of Jupiter's magnetic field, providing information on its internal structure and the nature of the dynamo; (4) the gravity field and distribution of mass inside the planet; and (5) Jupiter's three-dimensional polar magnetosphere and aurorae. Juno carries eight experiments to achieve these objectives. Juno was the second mission chosen for the New Frontiers program.

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