If space is full of rocks and other debris, why aren’t they colliding with us all the time? How does our atmosphere protect us?
What Happens When A Meteor Strikes Earth?
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How High Up Are Meteors When They Begin to Glow?
“Meteors are usually dust particles left behind by comets – bits of debris that enter Earth’s atmosphere from space. At what altitude do these meteors – sometimes called ‘shooting stars’ or ‘falling stars’ – become incandescent and begin to glow? That can vary.”
Near Earth Object Program
“The purpose of the Near-Earth Object Program is to coordinate NASA-sponsored efforts to detect, track and characterize potentially hazardous asteroids and comets that could approach the Earth. With over 90% of the near-Earth objects larger than one kilometer already discovered, the NEO Program is now focusing on finding 90% of the NEO population larger than 140 meters.”
Large-ish Meteor Hits Earth… But No One Notices
“”If a space rock hits the atmosphere, and no one is around to hear it, does the tabloid press still report it as an Earth-shattering event? Of course! This pretty much summarizes a large-ish meteor impact over the South Atlantic Ocean, which occurred on Feb. 6, and was recorded by the Fireball and Bolide Reports page of NASA’s Near Earth Object Program.”
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