NASA detected a huge Meteor explosion near Earth's atmosphere, which is said to be ten times stronger than Hiroshima atomic bomb, which took place in December previous year.
A fireball the size of the one that exploded over the Bering Sea is only expected about two or three times every 100 years, says NASA. That's another thing we have in our defense.
Military satellites detected the meteor at the time and sent the data to NASA, however the detonation had gone comparatively unrecognized by most.
Kelly Fast, near-Earth objects observations programme manager at NASA, discussed the event at the 50th Lunar and Planetary Science Conference in The Woodlands, near Houston, Texas. Dr. Kelly Fast, a researcher with the US space agency, explained that the area of explosion is not far from the usual route of several commercial flights between America and Asia. Reported sightings of the event from passengers or the pilots might provide some more insight into the explosion, and as such, researchers have been looking for these details.
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The second-largest asteroid to hit Earth in the last 30 years went undetected, until now. These types of blasts are dubbed "problems without passports" because they might impact entire regions if they come into contact with Earth's atmosphere.
However, according to scientists' estimates, it will take them another 30 years to meet their 90 percent objective.
Live footage on Russian TV showed a team pull out a 1.5-metre-long (five-foot-long) rock from the lake after first wrapping it in a special casing while it was still underwater.
But the latest event over the Bering Sea shows that larger objects can collide with us without warning, underlining the need for enhanced monitoring.
NASA and other space agencies continue to work to identify and monitor the trajectories of potentially hazardous near-Earth objects, but small space rocks with the potential to cause damage regularly evade detection. "But if you have an IR-based (infrared) telescope, it goes a lot faster", Amy Mainzer, chief scientist on the NeoCam project, said.