The universe is so vast in relation to the matter it contains that it can be compared in the following way: A building 20 miles long, 20 miles wide and 20 miles high that contains 1 grain of sand.
The three most common elements in the universe are 1) hydrogen; 2) helium; 3) oxygen.
As late as 1820, the universe was thought to be 6,000 years old. It is now thought to be between 15 and 20 billion years old.
Scientists believe that hydrogen comprises approximately 90 to 99 percent of all matter in the Universe.
A bucket filled with earth would Weigh about five times more than the same bucket filled with the substance of the sun. However, the force of Gravity is so much greater on the sun that a man Weighing 150 pounds on our planet would Weigh 2 tons on the sun.
A space vehicle must move at a rate of 7 miles per second to escape the earth's Gravitational pull. This is equivalent to going from New York to Philadelphia in about twenty seconds.
There are approximately 10,000 pieces of equipment revolving around the earth. About 3,000 of these pieces are satellites, the rest are odd bits of Debris.
Astronomers believe that the universe contains one atom for every 88 gallons of space.
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