Question

1a.Summarize what Asteroid and Comet is

b. Do people think an Asteroid or Comet

Impact can be stop? Explain why

c. Do people think an Asteroid or Comet

Impact can notbe stop? Explain why

d. Do you personally think an Asteroid or Comet

Impact can be stop? Explain why.

Answer 1

a )

Asteroids and comets have a few things in common. They are both celestial bodies orbiting our Sun, and they both can have unusual orbits, sometimes straying close to Earth or the other planets. They are both “leftovers” — made from materials from the formation of our Solar System 4.5 billion years ago. But there are a few notable differences between these two objects, as well. The biggest difference between comets and asteroids, however, is what they are made of.

While asteroids consist of metals and rocky material, comets are made up of ice, dust, rocky materials and organic compounds. When comets get closer to the Sun, they lose material with each orbit because some of their ice melts and vaporizes. Asteroids typically remain solid, even when near the Sun.

b ) an asteroid or comet impact can be stop because

Earth can't defy the odds forever, so the astronomers of the world watch the sky. Fortunately, should a significantly deadly Earth-bound asteroid present itself, we possess the technology to prevent the impact.

A number of additional asteroid mitigation tactics may become more feasible in the future. Scientists believe that robotic landers could be used to deflect asteroids, either via mounted thrusters or solar flares. The flares would reflect solar radiation, gradually nudging the asteroid away in the process. One proposed technique even calls for the use of an enormous spacecraft as a "gravity tractor," using its own mass to tug the deadly NEO away from Earth.

C ) There is no doubt that massive space rocks have the potential to harm life on Earth. But asteroid-trackers say existing sky surveys already keep us safe, and events like Asteroid Day risk scaring people unnecessarily.

“The asteroid impact threat is very easy to overstate and misunderstand,” says Eric Christensen of the University of Arizona in Tucson. “The popular conception of asteroids is that they are menacing and going to kill us all, and it’s just not true.”

d ) It’s probably going to be centuries before an asteroid like that hits over a populated area. If you go up to the size of a Tunguska impactor, the next one will likely hit us within a few centuries and impact over the ocean. All we need is to believe on our astronomers.

: )