Above Featured Pic: my painting of The Earth and a metallic table stand "It is not always a simple matter to decide which is the "satellite" in a pair of bodies.." ..because all objects with mass are affected by gravity, the motion of the primary object is also affected by the satellite. If two objects are sufficiently similar in mass, they are generally referred to as a binary system rather than a primary object and satellite; an extreme example is the 'double asteroid' 90 Antiope. The general criterion for an object to be a satellite is that the center of mass (known as the Barycenter) of the two objects is inside the primary object. Another, perhaps better known, example is the dwarf planet Pluto and its companion, Charon. While many consider Charon to be a satellite of Pluto, this can be debated, as their masses are similar to the point where their barycenter is not within either object. Accordingly, some consider Pluto and Charon to be the two members of a double planet system. Global warming is a reality and increasingly its consequences Globalwarming we think it does not showing any effect on the Earth but we are in a blind world . Floods, sudden rains, cyclones, droughts, Katrina, receding icebergs, are some of the harmful disaster of global warming. So we should do something to aware the people about how we can promote this keyword: Globalwarming awareness2007. Many Scientists have researched upon how to lower down Globalwarming . Today they have found many ways to do reduce the rate of Globalwarming. The big thing is that Globalwarming Awareness among the people can help the earth as well us . University of Arizona astronomer Roger Angel discovered that putting sunshades in space and has detailed his idea in a paper on the feasibility of cooling the Earth with a cloud of small spacecraft near Earth in the Proceedings of the National Academy of Sciences. Giving suggestion he told that launching a constellation of trillions of small free-flying spacecraft a million miles above Earth into an orbit aligned with the sun, called the L-1 orbit He given many example to demonstrate like this spacecraft would form a long, cylindrical cloud and would have a diameter about half that of Earth, and about 10 times longer. It is suggested that about 10 % of the sunlight passing through the 60 thousand mile length of the cloud, pointing lengthwise between the Earth and the sun, would be diverted away from our planet. This may result in gradually reduced sunlight by about 2% over the entire planet and would balance the heating of CO2 in the atmosphere of earth James Early of the Lawrence Livermore National Laboratory first mooted the use of space shade in 1989. military ufo videos flickr today