Melting a dangerous asteroid about to impact Earth

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SUMMARY

The discussion centers on the feasibility of melting a dangerous asteroid before it impacts Earth. Participants conclude that merely melting the asteroid would not mitigate the threat, as it would still retain its mass and pose a risk. Instead, vaporizing the asteroid is suggested as a more effective solution, although the energy required for such an action would be immense. Ultimately, altering the asteroid's trajectory is deemed the most practical approach to prevent an impact.

PREREQUISITES
  • Understanding of asteroid composition and structure
  • Knowledge of energy requirements for phase changes (melting and vaporization)
  • Familiarity with planetary defense strategies
  • Basic principles of orbital mechanics
NEXT STEPS
  • Research energy calculations for vaporizing asteroids
  • Explore current planetary defense technologies and methods
  • Study the physics of asteroid deflection techniques
  • Investigate historical asteroid impact events and their consequences
USEFUL FOR

Astronomers, planetary scientists, aerospace engineers, and anyone involved in planetary defense initiatives.

endoftime
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I was wondering how much energy it would take to melt a big enough asteroid considered to be dangerous? Is it even possible?

If possible, could it be done fast enough before it impacts?

If it is completely melted can it then be somehow dispersed so that it turns into smaller chunks that are not dangerous?
 
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endoftime said:
I was wondering how much energy it would take to melt a big enough asteroid considered to be dangerous? Is it even possible?

If possible, could it be done fast enough before it impacts?

If it is completely melted can it then be somehow dispersed so that it turns into smaller chunks that are not dangerous?

Melting an asteroid wouldn't be good enough (though it's a start), all you would have then is a molten asteroid of the same mass about to crash into Earth with the added bonus of now being so hot you can't lift bits off of it.

Continuing along your line of inquiry you would have to go further than that and vapourise it into a gas, the energy required to do that would be phenomenal. It would be far easier to just knock it off course.
 
ryan_m_b said:
... It would be far easier to just knock it off course.

I agree. Much more practical.
 

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