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NASA's DART spacecraft changed an asteroid's orbit around the sun

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Re: NASA's DART spacecraft changed an asteroid's orbit around the sun

#31
post #24

Earlier quoted context omitted.

Or offense.

You know what they say: the best planetary offense is a good asteroid redirect program It's also the best planetary terrorism, going by the plot of The Expanse

First things first, we have to colonize the rest of the solar system before we can terrorize Earth.

Re: NASA's DART spacecraft changed an asteroid's orbit around the sun

#32

Earlier quoted context omitted.

Be careful about how you store those inflammable propellers.

Inflammable made me so angry as a child/teen when I found out. I read it in our encyclopedia set but we didn't have a dictionary, and this was pre-internet. It was in the context of hydrogen and I could have sworn it was flammable. But here is this encyclopedia telling me it's INflammable. It's... not flammable? Looked it up in the school library. Thank you, that memory came up from the depths of time. Probably haven…

Inflammable means flammable? What a country!

Re: NASA's DART spacecraft changed an asteroid's orbit around the sun

#33

Wild that we went from "can we even deflect an asteroid" to measurably changing a solar orbit. 150 milliseconds sounds tiny until you realize compounding over decades makes that a meaningful trajectory shift. The engineering confidence this gives for actual planetary defense is massive.

Slight changes can cause such impacts? Now imagine how many other meteors and comets also will be adjusting because of this. Will one of them once on a course to never hit earth suddenly shift to hit earth in a thousand years time? The confidence i get is the opposite

I don't think asteroids (like the target) have influence on others. There's so much space between them, and their mass is almost neglible.

Re: NASA's DART spacecraft changed an asteroid's orbit around the sun

#34

Earlier quoted context omitted.

You know what they say: the best planetary offense is a good asteroid redirect program It's also the best planetary terrorism, going by the plot of The Expanse

First things first, we have to colonize the rest of the solar system before we can terrorize Earth.

That totally depends on the type of super villain organization we're discussing. Some are willing to watch the Earth burn making the colonization step unnecessary. Others think humans are the problem and again would be willing to skip that step.

Re: NASA's DART spacecraft changed an asteroid's orbit around the sun

#35
post #4

Interesting. I'd not considered the loss of mass as a means of propulsion. Obviously there was the kinetic energy transfer but the impact ejacted some of the asteroids mass opposite to it's trajectory further increasing it's trajectory change. Cool demonstration, hopefully not needed one day.

When the impact happened the news articles seemed to imply some surprise about that as well which seemed strange to me. I just wrote it off to the journalist just not being up to speed on the subject matter. The size of the debris field trailing also seemed to be a surprising result.

Re: NASA's DART spacecraft changed an asteroid's orbit around the sun

#36
post #21

Is debris a problem? I think the ideal would be to embed or clamp a rocket on the target.

Some have suggested attaching a solar shield to objects to add drag to alter the course. However, that would require a much more precise landing and some sort of drilling/anchoring effort. A kinetic impact like this is always going to be more efficient.

Re: NASA's DART spacecraft changed an asteroid's orbit around the sun

#38
post #24

Wild that we went from "can we even deflect an asteroid" to measurably changing a solar orbit. 150 milliseconds sounds tiny until you realize compounding over decades makes that a meaningful trajectory shift. The engineering confidence this gives for actual planetary defense is massive.

Or offense.

queue the neurodivergent mech pilot
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