NASA's Juno Spacecraft Reaches Jupiter's Orbit
It's arrived at last. After a five-year voyage and a 130,000-mph entry through intense radiation and debris that made for some anxious moments at ground control, the spacecraft fired a steadying engine blast and slipped into orbit Monday night. It's the start of a 20-month, $1.1 billion mission that will bring NASA's craft within 2,600 miles of Jupiter's clouds for a close-up look at its gravity, atmosphere and magnetic fields. Juno is designed to make 37 orbits before diving into the gas giant and disintegrating in 2018.