Which sentence best states the central idea of the passage? Juno
adapted from NASA
Juno is a NASA spacecraft that is orbiting Jupiter, the largest planet in the solar system. Juno launched in 2011 and arrived at Jupiter in 2016.
Juno is an orbiter. Orbiters fly around, or orbit, other bodies in space to study them. Orbiters circle above the atmosphere of planets. Juno will
be in polar orbit for about 20 months. Juno's first orbit will last 53.5 days. This long orbit allows the spacecraft to slow down and be captured in
the planet's gravity. Then Juno begins Its 14-day science orbits. During the science orbits, all of the spacecraft's science Instruments are on, and
Juno is capturing data. Juno will orbit Jupiter 37 times, coming within 4,200 kilometers (2,600 miles) of the tops of the planet's clouds. At the end
of its 37th revolution around the planet, the orbiter will deorbit. The spacecraft will dive into Jupiter's atmosphere and burn up.
Science Instruments on board Juno study Jupiter's atmosphere, magnetic field, and gravitational field. Juno is measuring the amount of water
and ammonia in Jupiter's atmosphere to help scientists learn how giant planets formed. Juno is studying Jupiter's atmosphere under the clouds
to find what Jupiter is made of. By mapping Jupiter's gravitational and magnetic fields, Juno can determine the mass of Jupiter's core.