On Sunday, 2010 July 11, a total eclipse of the sun will be visible from within a narrow corridor that traverses Earth’s southern Hemisphere. The path of the Moon’s umbral shadow crosses the South Pacific Ocean where it makes no landfall except for Mangaia (Cook Islands) and Easter Island (Isla de Pascua). The path of totality ends just after reaching southern Chile and Argentina. The Moon’s penumbral shadow produces a partial eclipse visible from a much larger region covering the South Pacific and southern South America.
Previous Eclipse from China 2008
Scenes from Past Eclipses
Solar Dynamics Observatory Beauty Shot

Solar Dynamics Observatory First Light Images
SOHO Observes Coronal Mass Ejection
Interview with Fred Espenak (Mr. Eclipse)
Interview with Holly Gilbert Astrophysicist

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Go green and save energy with Solatube Daylighting Systems, the smart alternative to skylights. Brighten dark rooms by bringing in the beauty of natural light. Energy-efficient Solatube products capture sunlight on the roof, redirect down a reflective tube and into your interior space. Simple, cost-effective home improvement. Installs in just two hours. Great for bathrooms, hallways, kitchens, closets, laundry rooms, living rooms, home offices. Our Designer Touches series lets you customize the daylight to fit any décor.

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In selecting a generator there are several issues to consider. One is power output, rated in watts or kilowatts (kw, meaning a thousand watts). Another is the fuel to power the generator, normally gasoline, diesel, propane, or natural gas. Another factor is the time the unit will run from one tank of fuel. And whether the unit is powered started from a battery, or uses a pull-cord to be manually started. Similarly a transfer switch can be automatic or manually switched.

Generators are available in power output ranges, from a small 800-watt unit with handles, to huge units to power a hospital during a power outage (1500 kilowatt or more). An 800-watt unit would be capable of powering eight 100-watt light bulbs, or equivalent, at one time. A popular size generator that is readily available from Sams, Sears, Home Depot, and such, is a unit built in a metal frame with power output of 4500 to 5000 watts (4.5 to 5 kw). This is what we have installed, and it is capable of powering the critical appliances in our house. We cant run the air conditioner, heater, or electric stovethey draw too much power for our 5 kw gasoline generator. We can power most of our lights, refrigerator and freezer, microwave oven, and it will operate our 240-volt water well pump. When we are using it, we try to keep power consumption to a minimum by not turning on lights and appliances when they are not needed. To exceed the 5000 watts rating would pop the generators circuit breaker at best, or possibly damage the generator.

Determining how big a generator you need can be done by adding up the wattages required by every device you want turned on at one time. This can be a little tricky, in that some appliances and devices cycle on and off, as needed; as an example, a well pump or refrigerator motor. And there are many devices in a normal home that tend to get overlooked: like clocks, devices that use plug-in transformers and power supplies, and devices like modern TVs with remotes that use a small amount of power, even when they are supposedly off. To determine how much power (wattage) a device uses, check the appliances labels or the owners manual.

Generators that operate from gasoline are the least expensive, but are louder, and wear out faster than diesel, propane, or natural gas generators. However, the diesel, propane, and natural gas generators are a lot more expensive than gasoline driven generators.

Our 5 kw gasoline generator will run about 5 hours from a full tank of gas. When you suspect the gas is about to run out, go ahead and power everything in the house off, shut off the generator and let it cool down before refilling the tank with gas. Gasoline spilt on a hot generator engine could start a fire and/or explodenot a good situation!

When you get a generator, read the owners manual carefully in regard to operating and maintaining the generator. The owners manual will probably suggest you drain the gas tank when not using the generator for long periods of time; and/or to shut off the gas line valve and run it until it stops, to empty the gas from inside the engine. Note: you can leave gas in the tank if you use a gasoline stabilizer (like PRI-G) to make sure the gas doesnt gum up inside the generators gas tank.

One other suggestion, when running a generator unattended outside, you might want to get a heavy chain and lock and secure it where it cant easily be stolen. Generator theft was popular during the long power outage in Montreal, Canada a few years ago.

Theres probably more that could be said, but this should give you some idea what is involved in selecting, purchasing, installing, and using an emergency backup generator

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