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| Moon being bombed by asteroids - courtesy NASA |
The energy of the Sun near Earth is about 1368 watts/meter squared. The Falcon Heavy will be able to lift a directional mirror into space with a variable focus length of about 50 feet to thousands of miles. Its 332 square meters could focus 455,000 watts onto a spot the size of a baseball, vaporizing whatever has the poor fortune to be there at the time.
Paper bags take 5 X the water to make and 7 X the fuel to transport than plastic bags
Why would someone want such a machine? To mine asteroids. To mine the moon. To melt lunar regolith and asteroid material into shapes to build habitats in space or on the Moon. To power crucibles making steel and aluminum and other metals in space. To vaporize space debris that has become a hazard. Such power is handy in space, but there is a dark side.
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Asteroid being mined with solar mirror - courtesy Dan Brown on flickr
What if someone wanted to use such a mirror to do damage to a particular country or city for military purposes? One could set fire to or melt just about anything on the Earth or Moon with such a machine - cities, missile silos, air fields, ships, cities, individual buildings. No satellite in orbit would be safe. It could destroy the International Space Station. Keep the keys to the space mirror in a safe place.
There is a lot of money invested in the idea of moving an asteroid near to the Earth and mining it for metals and minerals. The acceptable location for such a huge mass of metal would be one of the lunar Lagrange points L4 or L5 where it would rest in a stable orbit about the Earth. Getting it there is the trick. It would require a robotic space tug.
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What if someone deliberately sabotaged the space tug’s guidance system and sent a kilometer diameter chunk of iron hurtling toward the Earth? The damage could be incalculable. From treasure trove for the future of mankind to the fall of civilization for some poor region of Earth, perhaps the whole planet. Or someone could attach such a tug to a smaller asteroid and program it to come fast out of the sun. Undetectable until it is too late.
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| Asteroid being moved by space tug - courtesy Korite on flickr |
These examples are besides what may be already in orbit or planned to go into orbit. This includes EMP (electromagnetic pulse) bombs and “rods of god”. Since 1967 it has been illegal to park atomic weapons in orbit, but that may not stop the likes of North Korea. To get around the orbital nuclear bomb ban, the U.S. has come up with a simple rod of tungsten dropped from orbit. The one foot diameter by twenty feet long cylinder of metal reaches ten times the speed of sound by the time it hits and mimics a small nuclear device in its devastation. It penetrates hundreds of feet into the ground, destroying underground bunkers and silos - something a nuclear weapon cannot do.
That is not the only kinetic weapon available. Combine several NASA HiPEP ion thrusters with a TOPAZ style nuclear reactor, a guidance system, and a few tons of xenon (all properly armored against cosmic radiation); and you have a weapon that travels for light years and builds up a velocity that is an appreciable fraction of the speed of light. Besides targeting other planets for destruction, the truly paranoid might put such a device, perhaps several, in a long elliptical orbit around Earth, coming close to Earth on a periodic basis. In a form of mutually assured destruction, a country under attack could threaten to have one of these hit the Earth instead of continue its normal orbit. The affect would be similar to a super volcano eruption. Actual destruction might cover a continent. The weather effects could destroy the rest of civilization over the next few years.
Another thing about having control of weapons in space is that it would allow an interdiction of anyone else coming into space for commercial or exploratory purposes. The entity in control of such weapons would be the arbiter of who comes and goes in space, who gets the benefits, who prospers and who doesn't. This is a very powerful position. This is the kind of lopsided power that starts wars.
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Another thing about having control of weapons in space is that it would allow an interdiction of anyone else coming into space for commercial or exploratory purposes. The entity in control of such weapons would be the arbiter of who comes and goes in space, who gets the benefits, who prospers and who doesn't. This is a very powerful position. This is the kind of lopsided power that starts wars.
On June 18, 2018, President Trump directed the Pentagon to create a new division of the military - the Space Force. “My administration is reclaiming America’s heritage as the world’s greatest space-faring nation. The essence of the American character is to explore new horizons and to tame new frontiers. But our destiny, beyond the Earth, is not only a matter of national identity, but a matter of national security,” he announced. “[I]t is not enough to merely have an American presence in space. We must have American dominance in space.”
It seems the President may have been ill-informed about the advisability of a new branch of the military devoted only to space. The reason is that dominance of space means true dominance of the Earth. Other countries know this. The military has always valued high ground and space is the highest. That makes the President’s statement, “We must have American dominance in space,” one of the most nakedly aggressive of any leader of a nation on Earth regarding the frontiers of space. If any other large nations are taking him seriously, they will be making plans to counter aggressive actions taken in the last frontier.
With all of this death and destruction possible from outer space, it should be obvious that the exploration and exploitation of space should be done in joint ventures with as many countries participating as possible. This will cut down on paranoia about what any one country may be up to in space and prevent physical confrontations on Earth surrounding this subject and possibly prevent the use of space as the ultimate militarily strategic high ground.
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