Which solar system body is the target of exploration for NASA's Juno spacecraft?

Correct Answer: Jupiter

Step 1: Understanding NASA's Juno Mission
NASA's Juno spacecraft was launched on August 5, 2011, with the primary objective of studying the solar system's largest planet, Jupiter. Juno reached Jupiter's orbit on July 4, 2016, to conduct a comprehensive scientific investigation of the gas giant.

Step 2: Key Scientific Goals
The mission was designed to explore Jupiter's atmosphere, magnetosphere, gravitational field, and interior structure. By measuring the planet's atmospheric composition, deep magnetic field, and water abundance, scientists gain valuable insights into the origin and evolution of Jupiter as well as the early history of our solar system.

Step 3: Evaluating the Given Options
• Saturn: Explored in depth by the Cassini-Huygens mission.
• Neptune: Visited by Voyager 2 during a flyby in 1989.
• Uranus: Visited by Voyager 2 during a flyby in 1986.
• Jupiter: The target solar system body currently being orbited and studied by NASA's Juno spacecraft.

Hence, the target of exploration for NASA's Juno spacecraft is Jupiter.