Letters

Letters 07-25-2016

Remember Bush-Cheney Does anyone remember George W. Bush and Dick Cheney? They were president and vice president a mere eight years ago. Does anyone out there remember the way things were at the end of their duo? It was terrible...

Mass Shootings And Gun Control The largest mass shooting in U.S. history occurred December 29,1890, when 297 Sioux Indians at Wounded Knee in South Dakota were murdered by federal agents and members of the 7th Cavalry who had come to confiscate their firearms “for their own safety and protection.” The slaughter began after the majority of the Sioux had peacefully turned in their firearms...

Families Need Representation When one party dominates the Michigan administration and legislature, half of Michigan families are not represented on the important issues that face our state. When a policy affects the non-voting K-12 students, they too are left out, especially when it comes to graduation requirements...

Raise The Minimum Wage I wanted to offer a different perspective on the issue of raising the minimum wage. The argument that raising the minimum wage will result in job loss is a bogus scare tactic. The need for labor will not change, just the cost of it, which will be passed on to the consumer, as it always has...

Make Cherryland Respect Renewable Cherryland Electric is about to change their net metering policy. In a nutshell, they want to buy the electricity from those of us who produce clean renewable electric at a rate far below the rate they buy electricity from other sources. They believe very few people have an interest in renewable energy...

Settled Science Climate change science is based on the accumulated evidence gained from studying the greenhouse effect for 200 years. The greenhouse effect keeps our planet 50 degrees warmer due to heat-trapping gases in our atmosphere. Basic principles of physics and chemistry dictate that Earth will warm as concentrations of greenhouse gases increase...

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Star Sailor

Harley Sachs - July 7th, 2005
There’s a whirligig gadget on my window sill that may have come from a science museum, for it illustrates a power of light that is now being applied to space flight. It resembles a clear glass light bulb, but instead of a filament inside there’s a little windmill -- four black and white paddles that rotate on needle mounted in a pillar of glass. When sunlight strikes the paddles the gadget turns and in bright sunlight it spins. As long as the sun shines on it, it keeps on spinning.
The principle is simple: the pressure of the beams of light striking the blades causes the gadget to spin. This wouldn’t work if the blades were not sealed in a vacuum, for the pressure of the light is not strong enough to turn the blades in the presence of resistant air. This might seem like a perpetual motion machine, were it not for two factors. Eventually the pivot point where the blades rest on the column will wear out. So far, after many years on my window sill, that hasn’t happened. What has prevented this device from running forever is that the glass is not totally impermeable. Atom by atom, air has penetrated the glass so it is not a perfect vacuum and it takes more and more intense sunlight to make it turn.
But what if the same principle were applied to a sail on a space ship? Then, like the marvelous prairie schooner of Pecos Bill sailing across the sea of grass of our Great Plains, a space ship would go on in the vacuum of space, accelerating forever.

ULTRA-THIN SAILS
That was precisely the intention of a new space experiment launched from the Russian nuclear submarine Borisoglebsk. A Volne intercontinental ballistic missile was modified to carry the sailing space vehicle, Cosmos-1 and launched on what was planned to be a 500 mile high orbit. That was a nice peaceful modification for an otherwise lethal ICBM.
According to the website for the California-based Planetary Society, which sponsored the craft, signals were recorded independently at three ground stations, at Petropavlovsk in Kamchatka, Majuro in the Marshall Islands and Panska Ves in the Czech Republic, that Cosmos-1 was expected to pass over.
The society web page describes the Cosmos 1 as having eight triangular sails, each 50 feet long with the spacecraft’s body at the center. If the launch was successful, once reaching orbit the space craft would open the ultra-thin sails to be driven by the power of impacting photons from the sun, just like my window sill gadget.
This is seen as a solution for space flight, for such a space ship doesn’t need to carry fuel for propulsion. Like my 22-foot-sloop which sails Lake Superior on free wind, the Cosmos-1 would sail through space propelled by the pressure of a kind of solar wind.

MISSING
Unfortunately, although it was sponsored by Planetary Society enthusiasts from around the world, the Cosmos-1 has gone missing.. Apparently one engine of the Volne missile failed and the Cosmos-1 disappeared.
This doesn’t mean that the adventure is over. If you visit their web site you’ll discover that the Society sells T shirts, Cosmos-1 souvenirs, and posts a great deal of information about space flight going back to the days of Jules Verne and other science fiction imagineers for whom the Cosmos-1 is a present reality.
Now when I look at that little spinning solar windmill on my window sill, I will think of the Cosmos-1 and adventures of future sailors in space.





 
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