ASTEROIDS APLENTY. Our solar system has no shortage of asteroids. At last count, NASA estimated there were 781,454 of the rocky bodies orbiting our Sun. Tens of thousands of those are floating between the orbits of Mars and Jupiter in an area appropriately named the asteroid belt.
NASA’s Parker Solar Probe will explore the sun’s atmosphere in a mission that launched early Sunday. This is NASA’s first mission to the sun and its outermost atmosphere, called the corona.