Venus is often mistaken for UFO Venus, so much nearer to the sun than Earth, is speeding ahead of Earth in its orbit around the sun. And although Venus' distance from the Earth is much farther than it was a month ago, the planet shines brighter now. From Earth, Venus is the brightest body in the solar system after the sun and the moon. Although Venus peaked in brightness more than a week ago, it is still bright enough to be mistaken - as it occasionally is - for an unidentified flying object. Its brightness is attributed to the fact that nearly a quarter of its lit half faces Earth, according to Astronomy magazine. Also, the thick Venusian cloud cover reflects three-quarters of the light that hits it, says astronomer Ian Ridpath. Tomorrow and Tuesday, it may be possible to see Venus near the crescent of the waning moon, both before dawn and through sunrise. The moon passes 7 degrees north of Venus on Tuesday. Venus is on average 67.24 million miles from the sun. Its orbit brings it nearer to the Earth than does the orbit of Mars. The Venusian year is 224.7 Earth days in length. Venus rotates on its axis once every 243 Earth days. Unlike most other planets, Venus has a clockwise rotation, which means the Venusian sun rises in the West rather than the East as on Earth. Its size, however, is more comparable to the Earth's than to any other planet. Venus has a diameter of 7,521 miles, while Earth's diameter is 7,927 miles. The atmosphere of Venus is made up primarily of carbon dioxide and has a pressure of 90 to 100 times that of the Earth. Scientists believe the carbon dioxide helps trap most of the sun's heat in the atmosphere, making Venus the hottest of the solar system's planets. The surface termperature of Venus can climb above 850 degrees Fahrenheit. Its thick clouds are composed mainly of sulphuric acid. Radar maps of almost the entire surface of Venus have been made from satellites circling the planet. Pioneer 12, launched May 20, 1978, was the first U.S. spacecraft to orbit Venus and map topographic features including its tallest peak, the 7-mile-high Maxwell Montes. Venus has a rocky surface and is cratered. Many craters are only 20 miles wide, but the largest crater was found to be 150 miles across. A step closer to the sun, Mercury, nearly 123 million miles away, is in superior conjunction with the Earth tomorrow, but it won't be visible again until just after sunset on Saturday. When either Mercury or Venus is on the far side of the sun from Earth, it is said to be in superior conjunction to Earth. When it is between Earth and the sun, it is said to be in inferior conjunction. When the outer planets are on the far side of the sun from the Earth they are said only to be in conjunction. There is no need to distinguish between inferior and superior positions for them since they can never be in inferior conjunction. -!- WM v3.00 [Gamma] * Origin: STARGATE BB.SYSTEM NEW YORK,NY (718) 519-8042 (1:278/714.0) --- . Titan|um Knight ( titan@sys6626.bison.mb.ca ) Amiga 1200: 32 Bit, 16.8 Million Colours