Mysterious Fireballs ,Australia-UFO?. Video.

Spring has arrived in the Northern Hemisphere, which means that birds are chirping, flowers are blooming — and fireballs are lighting up the sky, NASA says.

For some mysterious reason, the number of fireballs — dramatic meteors that blaze brighter than any planet when they burn up in Earth’s atmosphere — peaks at this time of year.

“Spring is fireball season,” said Bill Cooke, of NASA’s Meteoroid Environment Center, in a statement. “For reasons we don’t fully understand, the rate of bright meteors climbs during the weeks around the vernal equinox.” [Spectacular Leonid Meteor Photos]

http://www.space.com/11281-shooting-stars-fireballs-meteors-spring.html