Quick explanation The major meteor showers of the year are: Quadrantids January 1-6 (peak Jan 3-4) Lyrids April 19-25 (peak Apr 21-22) Eta Aquarids May 1-10 (peak May 5) Delta Aquarids July 15-August 15 (peak July 28-29) Perseids July 23-August 20 (peak Aug 12-13) Orionids October 16-27 (peak Oct 20-22) Taurids October 20-November 30 (peak Nov 4) Leonids November 15-20 (peak Nov 17-18) Geminids December 7-15 (peak Dec 13-14) Meteor showers are associated with the remnants of the tails of comets and occur when the Earth's orbit crosses the path of a comet's tail (the Leonids are associated with Comet Tempel-Tuttle). The particles are mostly minute and burn up in the upper atmosphere within a second or two. Sporadic meteors can occur at any time: there are usually two-three an hour visible from any one place in good dark skies. They are just random dust particles hitting the atmosphere. Bigger lumps - bits knocked off asteroids, the Moon or Mars, or bits of space hardware re-entering the Earth's atmosphere - can also occur at any time and these burn up lower in the atmosphere, and I suspect that this is what caused the fireball yeahbabyyeah saw. The biggest of the non-man-made ones hit the ground as meteorites.