"Tonight, 540 million miles away, Juno performed a precisely choreographed dance at blazing speeds with the largest, most intense planet in our solar system", said Guy Beutelschies, director of Interplanetary Missions at Lockhead Martin Space Systems.
Upon its arrival, Juno passed within 2,900 miles of Jupiter's cloud top.
JUNO: Jupiter has new visitor - a solar-powered spacecraft
Named after Jupiter's cloud-piercing wife in Roman mythology, Juno is only the second mission created to spend time at Jupiter. Juno will also study how deep the trademark Great Red Spot goes and why the centuries-old storm has shrunk in recent years.
Juno will orbit the planet 37 times before crashing into the surface in 2018.
The first goal of the mission was to see if we could get there.
Among the mysteries that scientists hope to solve over: Does Jupiter, dubbed "the most dominant object in the solar system", have a solid core? The spacecraft will first make two 53.5-day orbits of Jupiter. That would fry the average spacecraft, so Juno's hardware had to be encased in titanium so it can still take pictures and gather data.