Comets Are Threatening For Earth Too

Posted: Dec 14 2016, 8:28am CST | by , Updated: Dec 14 2016, 8:31am CST , in Latest Science News


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Comets are Threatening for Earth too
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  • Comets are Threatening for Earth

A researcher at NASA's Goddard Space Flight Center in Greenbelt, Maryland named Joseph Nuth said that, comets can affect the calamity of earth.

Those who defend the planet ignore comets, and it’s due to wrong perception that comets can’t be stopped. It’s difficult to track the ice bodies as said by Nuth, but we can prevent it if we get prepared.

Comets are dangerous

The research reveals that it’s easy to deal with asteroids, because they are common. It’s easy to detect NEAs, Near Earth Asteroids than comets, because NEAs are just like our planet. But, comets exist deep in the external solar system, so they are difficult to detect. According to scientists, the Halley comet revolves around sun once in every 75 years.

According to Nuth, comets suddenly appear from nowhere. He said that comet named Siding Spring appeared in 2013 and 2014 striking Mars, and both were dangerous. A space aircraft can destroy comet, but it takes 5 years to prepare a spacecraft, said by Nuth in AGU conference. Comet is larger than NEAs, so they strike the earth at high velocity.

On the contrary, NEA that hits Earth at about 44,700 mph (71,940 km/h) is not dangerous. Siding Spring comet hit the mars at about 125,000 mph (200,000 km/h).Though, comets are rare but it’s alarming when they strike.

How to Control Comets?

Nuth says that, we should make preparations to deal with comets. We should create methods to reduce comets reaction time. Nuth plans for two spacecrafts, named Interceptor and Observer. He says that we should store these spacecrafts to deal with comet attacks in future. The Observer spacecraft will detect the nature of comet, and in case of any danger an Interceptor would be used to destroy the comet.

Nuth said,the interceptor would have a nuclear bomb. NASA plans to present this plan to Congress. A handsome amount of money is required for this mission, Nuth said. Several hundred million dollars are required to make such aircrafts. Nuth said, I can just recommend this plan as a scientist, but I can’t make policies in NACA.

Preventing Comets with Lasers

Another option is to destroy the comets with lasers without involving spacecraft. The laser blast can hit the comet from a long distance,reducing its danger. The study on sun was done by Qicheng Zhang, a physics undergraduate at the University of California, Santa Barbara.

According to, he said that laser system that’s developed to create blast to Alpha Centauri would alsodestroy comets. According to Zhang, a large laser can destroy the comet easily. This laser system can also perform several other tasks in the space.

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