Nano technology:

METEOR SHOWER 

Nearly 50 tons of space debriscrash onto the Earth every day.While some debris shyly dissipate into the atmosphere,others display a spectacular light show.Meteor showers occur when the Earth's orbitintersects with the orbit of a comet.As comets travel,they leave behind trails of rocky material,oftentimes the size of pebbles or grains of sandbut sometimes as large as boulders.Every year, the Earth crosses these trails of debrisknown as meteoroid streams,and the planet becomes sprinkled with rocky material.The debris then race through the Earth's atmosphere,creating friction with air particlesand generating vast amounts of heat.This heat vaporizes and illuminates the debris as they fall,creating streaks of light in the sky,popularly known as shooting stars.These celestial light shows are often namedafter the constellation where they appear to originateas seen from Earth's surface.Meteor showers that seem to fallfrom the constellation Perseus are called the Perseids,and those appearing from the constellation Geminiare called the Geminids.About 30 meteor showers can be seen from Earththroughout the course of a year,and because the showers are timed with Earth's orbit,the celestial phenomenon are cyclicaland occur at regular intervals.For example, the Perseid meteor shower happens every August,and the Geminid meteor shower happens every December.Meteor showers have inspired aweand admiration for millennia.In Christian tradition, the Perseid meteor showerssymbolize the tears of a saint, Saint Lawrence,who was executed in August of the year 258,and in the first century A.D.,the astronomer Ptolemy believed that shooting starswere a sign of the gods looking upon mortalsand listening to their wishes.Inspiring everything from making wishesto reveling at the sky,meteor showers are a reminder of our placein a dynamic and beautiful cosmic ecosystem.