Is the sky falling?
No,the sky is not falling. Many people wonder if the sky is falling because the satellites and "space junk"are sometimes falling from the earths atmosphere. We believe that 20,000 pieces of space junk orbit the earth. Sometimes even at 5 miles per second. Space is also filled with rocks and stones called meteoroids. The earths ozone layer helps keep the meteoroids out from entering the earths atmosphere. On their flight to earth, objects meet the wind from the air in the atmosphere. When this happens it causes friction and makes a lot of heat. In fact most of the objects burn up on their flight. If a piece of meteoroid is big enough to survive the way down it is hot and we usually call them shooting stars, falling stars or meteors. Only 4 people have been hit by a meteor but none have had serious damage. Only 1 person has been hit in 1997 by a piece of space junk. It was a piece of the Delta ll rocket and felt like somebody was tapping her. By the way, the odds of getting hit by space junk is 1 out of 100 trillion. Getting hit by lightning is 1 out of 60,000.
Atmosphere-- Is the earths space.
Meteoroid-- rocks and stones of all different sizes.
meteor-- Is when a meteoroid survives its flight down to earth.