NASA's asteroid-hunting NEOWISE survey uses infrared to detect and characterize asteroids and comets. Since the mission was restarted in December 2013, NEOWISE has observed or detected more than 29,000 asteroids in infrared light, of which 788 were near-Earth objects.

The orbits of Mercury, Venus and Mars are shown in blue. Earth's orbit is in teal.

Green dots represent near-Earth objects. Gray dots represent all other asteroids which are mainly in the main asteroid belt between Mars and Jupiter. Yellow squares represent comets.

The survey depicted in the animation covers the period from December 13, 2013 to December 13, 2017.

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