Has it got those rings around it??
2006-07-31 20:18:02
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answer #1
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answered by Mich 3
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Venus (planet), one of the planets in the solar system, the second in distance from the Sun. Except for the Sun and the Moon, Venus is the brightest object in the sky. The planet is called the morning star when it appears in the east at sunrise, and the evening star when it is in the west at sunset. In ancient times the evening star was called Hesperus and the morning star Phosphorus or Lucifer. Because of the distances of the orbits of Venus and Earth from the Sun, Venus is never visible more than three hours before sunrise or three hours after sunset.
When viewed through a telescope, the planet exhibits phases like the Moon. Maximum brilliance (a stellar magnitude of -4.4, 15 times as bright as the brightest star) is seen in the crescent phase when Venus is closer to Earth. Venus’s full phase appears smaller and dimmer because it occurs when the planet is on the far side of the Sun from Earth. The phases and positions of Venus in the sky repeat every 1.6 years (see Time; Year). Transits of Venus (when the planet moves across the face of the Sun as seen from Earth) are rare, occurring in pairs at intervals of a little more than a century. The next two transits will be in 2004 and 2012.
Venus's complete cloud cover and deep atmosphere make it difficult to study from Earth. Most knowledge of the planet has been obtained through the use of space vehicles, particularly those carrying probes that descend through the atmosphere. The first flyby was that of Mariner 2, launched by the United States in 1962, followed by Mariner 5 in 1967 and Mariner 10 in 1974. The former Union of Soviet Socialist Republics developed several entry probes, some combined with flybys or orbiters: Venera 4 and 5 (1967), 6 (1969), 7 (1970), 8 (1972), 9 and 10 (1975), 11 and 12 (1978), 13 and 14 (1981), and 15 and 16 (1983); Vega 1 and 2, sent toward Halley's comet in 1984, also flew by Venus and released descent capsules. Several of these probes successfully reached the planet's surface. The United States sent two Pioneer Venus missions in 1978. Pioneer Venus 2 sent four probes to the surface, while the remaining craft explored the upper atmosphere. Pioneer Venus 1, an orbiter, measured the upper atmosphere for 14 years. The Magellan probe, launched toward Venus in 1989, transmitted radar images of the planet from 1990 to 1994.
2006-07-31 20:20:43
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answer #2
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answered by ? 3
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Venus is 67.2 million miles from the Sun, it has a diameter of 7,251 miles, the average surface temperature is 464 degrees celsius. It doesn't have any moons. Venus takes 224.7 Earth days to complete one orbit. It spins very slowly on it's axis, slower than any other planet, it takes 243 Earth days for just one spin, which means that a Venus day is longer than it's year. Venus spins in the opposite direction to Earth.
Venus is the brightest planet in Earth's sky, only the Sun and Moon are brighter. It is seen in the early morning or early evening sky. There is an excellent book called Universe published by DK, ISBN 1 4053 1071 5. Good luck with your new hobby, it is so much fun. The more you learn the fascinated you will become.
2006-07-31 20:32:09
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answer #3
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answered by Anonymous
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Venus is interesting. It is the brightest planet in the sky (it's proximity to Earth lends a favorable view of the planet- Sunlight reflects off of the thick, everpresent clouds- made from sulphur-dioxide.
Temperature hovers around 890 degrees fahrenheit, because of runaway greenhouse gases.
Venus was a subject of great speculation until some of its secrets were revealed by planetary science in the 20th century. Venus has the densest atmosphere of the terrestrial planets, consisting mostly of carbon dioxide, and the atmospheric pressure at the planet's surface is 90 times that of the Earth.
Venus' surface has been mapped in detail only in the last 20 years. It shows evidence of extensive volcanism, and some of its volcanoes may still be active today. In contrast to the constant crustal movement seen on Earth, Venus is thought to undergo periodic episodes of plate tectonics, in which the crust is subducted rapidly within a few million years separated by stable periods of a few hundred million years.
The planet is named after Venus, the Roman goddess of love, and most of its surface features are named after famous and mythological women.
2006-07-31 20:22:34
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answer #4
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answered by User 3
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Position: Second from Sun
Distance from Sun: 108,200,000 km (.72 AU)
Venus Day: 243 Earth Days
Venus Year: 224.7 Earth Days
Orbital Speed: 35 km/sec
Eccentricity of Orbit: 0.007
Satellites: None
Diameter: 12,100 km
Mass: 4.869e24 kg
Major Atmospheric Gas: Carbon Dioxide
Venus is the sixth largest planet in the Solar System.
Similar in size, density, and mass, Venus and Earth often referred to as sister planets. However the surface and atmosphere of the two planets are drastically different.
The atmosphere of Venus is primarily composed of carbon dioxide (96%) and nitrogen (3%), with traces of other gases and little to no water vapor.
Venus would have a cold climate if it weren't for the high concentration of carbon dioxide in its atmosphere (96%). The high albedo on Venus reflects the majority of the solar radiation that reaches it, but carbon dioxide, a well known greenhouse gas, keeps the planet extremely warm. In fact the surface temperature of Venus is over 480 degrees C (900 degrees F).
The clouds in Venus' atmosphere are composed of sulfuric acid which causes the planet to reflect 65% of the sunlight that reaches it. Thus, Venus the third brightest object in the sky (third only to the Sun and the Moon).
The atmospheric pressure on the surface of Venus is that 90 times the pressure on Earth..
The surface of Venus is very dry with flat plains, highland regions, and depressions.
The interior of Venus is composed of a central iron core and a molten rocky mantle, similar to the composition of Earth.
The rotation of Venus is very slow. A day on Venus (243 Earth days) is longer than a year (224.7 Earth days). The rotation is also opposite from that of Earth, with the Sun rising in the West.
Venus has been visited by over 20 spacecrafts. The first visit was made by Mariner 2 in 1962. The Soviet Venera 7, which visited Venus in 1970, was the first spacecraft to land on another planet. A recent visit made by the Magellan, launched in 1989, produced high resolution maps of the surface using radar.
Venus is named after the Roman goddess of love and beauty.
2006-07-31 20:26:42
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answer #5
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answered by tina m 2
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The atmosphere of Vesus whips around the planet faster than the planet rotates, in the opposite direction that the planet rotates, signifying that the venusian rotation on it's axis was reversed by some sort of huge impact and the atmosphere kept going like it was before. This would also explain why the entire surface of the planet appears to have been resurfaced recently.
2006-08-01 01:16:41
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answer #6
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answered by Anonymous
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Venus is called Earths twin sister because of the size. Earth is just a little bit bigger than
Venus. But the heat on Venus is Mind Bubbling.
2006-07-31 20:23:19
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answer #7
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answered by Wisdom 4
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the ratio of the "periods" of revolution is almost exactly
8 to 5. ...
and if you track the points of "highest elevation" of Venus
above the earth-horizon over an 8-year span, ... plot the background star-location on a star-chart and you will see that Venus has described a pentagram in the sky ...
oooo .... inspired by the Da Vinci Code ...
it's true from an astronomical point of view
2006-07-31 20:21:54
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answer #8
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answered by atheistforthebirthofjesus 6
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Russians were the only country who ever landed a probe on it. But it melted after 2 minutes or so.
2006-07-31 20:18:47
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answer #9
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answered by Anonymous
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It is the only planet in our solar system to spin clockwise (retrograde).
2006-08-01 22:41:45
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answer #10
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answered by Lizzard 4
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its named after a roman godess
2006-07-31 20:21:46
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answer #11
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answered by hongkonghusain 2
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