Opportunity and Spirit, the US Mars rovers, are both working well now. They are looking for signs that liquid water once existed on Mars. If liquid water existed, perhaps life may have existed there too. Opportunity, the name of the second rover to land on Mars, is taking color pictures of the crater it sits [...]
Since 1955 when the atomic clock was invented, scientists have been able to measure the exact length of one earth year to the very second. For many years, the Earth would lose one second every year. So one year lasted one year plus one second. Since 1999, however, the Earth has not lost a second [...]
China’s first person in space, Yang Liwei, said that he could not see the Great Wall from space. Up until that time, people thought that space travelers who circle the Earth could see the Great Wall without a telescope. The Great Wall runs 4,500 miles across northern China. It is only a few yards wide, [...]
The scientists call this red planet Sedna. Sedna was a goddess of the Inuit tribe. The planet is about 1000 miles in diameter. Earth has a diameter of 8000 miles. Sedna is very cold. A warm day on Sedna is -400 degrees Fahrenheit. It takes Sedna 11,500 Earth years to go one time around the [...]
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