Fill in the missing letters in the paragraph.
The number of underlines shows how many letters you need to fill in. You may answer with the full word or only the missing part.
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Each year, certain nights offer spectacular displays of meteor showers, events caused by streams of deb_ _ _ left behind by comets or, in some cases, ast_ _ _ _ _ _ . As Earth passes through these particle trails, small fragments enter the atm_ _ _ _ _ _ _ at high speeds and vap_ _ _ _ _ due_ _  intense friction, producing bright streaks of lig_ _ in the sky. The apparent increase in activity occurs because the particles originate from a common stream in space, causing the meteors to seem to radiate from a single point. Astronomers use careful obs_ _ _ _ _ _ _ _ and long-term data collection to predict the timing and intensity of major meteor showers with considerable accuracy.