Earth is under constant bombardment from space.
fall into our atmosphere on a daily basis, sometimes burning up spectacularly in a blazing streak across the sky.or comet that have broken off their parent body and wound up falling into Earth's gravity well.
Visitors from the Oort Cloud that we've identified to date are extremely icy. They're sometimes known as long-period comets, on orbits around the Sun that takeThey're thought to have been kicked out of the Oort Cloud between 2,000 and 100,000 astronomical units from the Sun by gravitational influences, and flung inwards on their looping paths.of these long-period comets have been identified, scientists have a decent idea of the characteristics they have in common.
For 2.4 seconds, these cameras tracked the meteor over 148.5 kilometers, giving scientists detailed data on the object's trajectory and disintegration. Fireballs are thought to heat up and explode as atmospheric gases seep into minute cracks in the rock, pressurizing it from the inside and causing it to go boom.
The object, Vida and his team found, was around 10 centimeters across, with a weight of around 2 kilograms . It was thought to have fallen deeper into the atmosphere than any icy object has ever been known to. In fact, its burn and disintegration were exactly consistent with a rocky fireball.
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