Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. Automated software maintained by NASA’s Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth’s atmosphere and many other characteristics. Daily results are presented on http://spaceweather.com/
On Nov. 25, 2014, the network reported 55 fireballs.
(44 sporadics, 4 alpha Monocerotids, 4 Leonids, 2 November omega Orionids, 1 Northern Taurid)
In this diagram of the inner solar system, all of the fireball orbits intersect at a single point–Earth. The orbits are color-coded by velocity, from slow (red) to fast (blue). [Larger image] [movies]