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Old 01-22-2018, 06:11 PM   #871 (permalink)
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Don't have to go to the asteroid belt.
There are at least 100 of them that cross earth's orbit and large enough to sterilize the planet if they were to impact.
So what do you do? Put a mining colony on it to self sustain while it goes round until it comes back again several years later and shoot the spoils back to earth at the next near crossing?
.
Gaining the energy to alter the trajectory so as to "park" an asteroid in any different orbit is another one of those ideas that don't even come close to adding up if you run the numbers. Not happening.

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Old 01-22-2018, 06:19 PM   #872 (permalink)
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How is space tether technology looking? Are electric catapults feasible for cargo?

I have always wondered about bombarding Mars with comets.
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Old 01-22-2018, 06:58 PM   #873 (permalink)
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Use a lissajous orbit like the stereo solar obsevation satellites use.
But it will be easier to find what we need here for a very long time.
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Old 01-22-2018, 07:19 PM   #874 (permalink)
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Quote:
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But it will be easier to find what we need here for a very long time.
Yes, we'll have Wally-bots mining old landfills long before we're harvesting space minerals.
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Old 01-22-2018, 08:03 PM   #875 (permalink)
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I once watched Eugene Water & Electric board employees drop $25,000 worth of copper into a landfill. It was in transformers filled with PCB.

Everybody is in too much of a hurry.

https://en.wikipedia.org/wiki/Interp...nsport_Network

Quote:
The Interplanetary Transport Network (ITN)[1] is a collection of gravitationally determined pathways through the Solar System that require very little energy for an object to follow. The ITN makes particular use of Lagrange points as locations where trajectories through space are redirected using little or no energy. These points have the peculiar property of allowing objects to orbit around them, despite lacking an object to orbit. While they use little energy, the transport can take a very long time. Shane Ross has said "Due to the long time needed to achieve the low energy transfers between planets, the Interplanetary Superhighway is impractical for transfers such as from Earth to Mars at present."[2]
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Old 01-22-2018, 08:39 PM   #876 (permalink)
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Quote:
Originally Posted by myself
New Zealand is now a commercial space-faring nation.
"Still Testing" Heh.

Kerosene/LOX
3D printed engine parts
Composite fuel tanks
electric turbo-pumps
The claim is that it's Moon-capable.
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Old 01-22-2018, 08:41 PM   #877 (permalink)
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1. Send your 64 best unmarried and childless men and 64 best unmarried childless women on a generation ship.
2. Develop FTL drive.
3. Send your 1,024 most annoying future equivalents of millenials.
4. Have them arrive just hours before the generation ship.
5. The generation ship is greeted by a horde of entitled and hungry locusts expecting someone else to make dinner.
6. The generation ship leaves for Venus.
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Old 01-22-2018, 10:33 PM   #878 (permalink)
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'Old age and treachery...'

They'll trade their FTL drive for lunch.
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Old 01-23-2018, 03:16 PM   #879 (permalink)
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Two stories from the 'be careful what you wish for' department:

Creating clouds to stop global warming could wreak havoc - usatoday

A technology many hoped would fight climate change would cause even bigger environmental problems, scientists say - Chicago Tribune

The first is premised on starting and then stopping abruptly (inadvertently or not)
Quote:
Researchers in the study used computer models to simulate what would happen if geoengineering led to climate cooling and then what would happen if the geoengineering stopped suddenly.
The second on growing biomass specifically to pyrolyze it.
Quote:
But the core idea is burning trees or other plants for energy while pulling in the resulting carbon dioxide and storing it below ground.
Of course, the first of the three Rs is Reduce.
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Old 01-23-2018, 03:22 PM   #880 (permalink)
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I like reduce, reuse and recycle.
Because I'm cheap.

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