This movie shows the progression of NASA's Near-Earth Object Wide-field Survey Explorer (NEOWISE) investigation for the mission's first two years following its restart in December 2013.
Transcript:Green circles represent near-Earth objects (asteroids and comets that come within 1.3 astronomical units of the sun; one astronomical unit is Earth's distance from the sun). Yellow squares represent comets. Gray dots represent all other asteroids, which are mostly in the main asteroid belt between Mars and Jupiter. The orbits of Mercury, Venus, Earth and Mars are shown.
Since the mission was restarted in December 2013, NEOWISE has discovered 72 near-Earth objects and characterized 439 others.
Image credit: NASA/JPL-Caltech/UCLA/JHU