Juno has left Earth and is on a 5 year cruise to Jupiter. It will arrive in Jovian space in July 2016. Juno will orbit Jupiter for about one year. Juno will study how much water is in Jupiter's atmosphere; look deep into Jupiter's atmosphere to measure composition, temperature, cloud motions and other properties; map Jupiter's magnetic and gravity fields, revealing the planet's deep structure; and study Jupiter's magnetosphere near the planet's poles, especially the auroras - Jupiter's northern and southern lights - providing new insights about how the planet's enormous magnetic force field affects its atmosphere.