Wednesday, 12 August 2009

Perseid Meteor Shower

The Earth is entering a stream of particles emitted by the Comet Swift-Tuttle. You can expect metoer showers to light up the skies on August 11 and 12.

What causes meteor showers?

A meteor shower (some of which are known as "meteor storms" or "meteor outbursts") is a celestial event in which a number of meteors are observed to radiate from one point in thenight sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speed on parallel trajectories. Most are smaller than a grain of sand, so almost all meteoroids disintegrate and never hit the Earth's surface. Fragments which do contact Earth's surface are called meteorites.
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