NASA’s New Horizons spacecraft got a big speed boost today, when it used Jupiter’s gravity to give it a slingshot towards its final destination of Pluto. It didn’t exactly skim the planet’s surface, but New Horizons got as close as 2.3 million kilometers (1.4 million miles) to Jupiter. Apart from the speed boost, this was … Continue reading "New Horizons Gets a Gravity Boost From Jupiter"