Significant Energy E vents in Earths and Lifes History as of 2014.Energy Event.Timeframe.Significance.Nuclear fusion begins in the Sun.The Planet Venus Universe Today.As the morning star, the evening star, and the brightest natural object in the sky after the Moon, human beings have been aware of Venus since time immemorial.Even though it would be many thousands of years before it was recognized as being a planet, its has been a part of human culture since the beginning of recorded history.Because of this, the planet has played a vital role in the mythology and astrological systems of countless peoples.With the dawn of the modern age, interest in Venus has grown, and observations made about its position in the sky, changes in appearance, and similar characteristics to Earth have taught us much about our Solar System.Size, Mass, and Orbit Because of its similar size, mass, proximity to the Sun, and composition, Venus is often referred to as Earths sister planet.With a mass of 4.Venus is 8.Earth, and has 9.Venus orbits the Sun at an average distance of about 0.AU 1.In fact, with its farthest orbit aphelion of 0.AU 1.AU 1. 07,4. 77,0.Solar System.Size comparison of Venus and Earth.Credit NASAJPLMagellan.When Venus lies between Earth and the Sun, a position known as inferior conjunction, it makes the closest approach to Earth of any planet, at an average distance of 4.Earth.This takes place, on average, once every 5.Daemon Tools Pro Advanced 4 Final Activated Charcoal Walmart .The planet completes an orbit around the Sun every 2.Venus is 6.Earth.Unlike most other planets in the Solar System, which rotate on their axes in an counter clockwise direction, Venus rotates clockwise called retrograde rotation.It also rotates very slowly, taking 2.Earth days to complete a single rotation.This is not only the slowest rotation period of any planet, it also means that a sidereal day on Venus lasts longer than a Venusian year.Composition and Surface Features Little direct information is available on the internal structure of Venus.However, based on its similarities in mass and density to Earth, scientists believe that they share a similar internal structure a core, mantle, and crust.Like that of Earth, the Venusian core is believed to be at least be partially liquid because the two planets have been cooling at about the same rate.One difference between the two planets is the lack of evidence for plate tectonics, which could be due to its crust being too strong to subduct without water to make it less viscous.Is There Evidence Of Volcanic Activity On Mars And Venus' title='Is There Evidence Of Volcanic Activity On Mars And Venus' />This results in reduced heat loss from the planet, preventing it from cooling and the possibility that internal heat is lost in periodic major resurfacing events.This is also suggested as a possible reason for why Venus has no internally generated magnetic field.The internal structure of Venus the crust outer layer, the mantle middle layer and the core yellow inner layer.Credit Wikipedia Commons.Venus surface appears to have been shaped by extensive volcanic activity.Venus is the second planet from the Sun and the sixth largest.Venus orbit is the most nearly circular of that of any planet, with an eccentricity of less than 1.THE MOON IS A FOREIGN NATION.Apollo Moon astronauts were often followed to the Moon, at times, by U.F.O. s. Official N.A. 4 Temporada De Prison Break Dublado Download Itunes here. S. A. Apollo 12 photograph AS12497319.Venus also has several times as many volcanoes as Earth, and has 1.The presence of these volcanoes is due to the lack of plate tectonics, which results in an older, more preserved crust.Whereas Earths oceanic crust is subject to subduction at its plate boundaries, and is on average 1.Venusian surface is estimated to be 3.There are indications that volcanic activity may be ongoing on Venus.Missions performed by the Soviet space program in 1.European Space Agency have detected lightning storms in Venus atmosphere.Since Venus does not experience rainfall except in the form of sulfuric acid, it has been theorized that the lightning is being caused by a volcanic eruption.Other evidence is the periodic rise and fall of sulfur dioxide concentrations in the atmosphere, which could be the result of periodic, large volcanic eruptions.And finally, localized infrared hot spots likely to be in the range of 8.K have appeared on the surface, which could represent lava freshly released by volcanic eruptions.The preservation of Venus surface is also responsible for its impact craters, which are impeccably preserved.Almost a thousand craters exist, which are evenly distributed across the surface and range from 3 km to 2.No craters smaller than 3 km exist because of the effect the dense atmosphere has on incoming objects.D perspective of the Venusian volcano, Maat Mons generated from radar data from NASAs Magellan mission.Essentially, objects with less than a certain amount of kinetic energy are slowed down so much by the atmosphere that they do not create an impact crater.And incoming projectiles less than 5.Atmosphere and Climate Surface observations of Venus have been difficult in the past, due to its extremely dense atmosphere, which is composed primarily of carbon dioxide with a small amount of nitrogen.At 9.MPa, the atmospheric mass is 9.Earths atmosphere and the pressure at the planets surface is about 9.Earths surface.Venus is also the hottest planet in our Solar System, with a mean surface temperature of 7.K 4.C8. 63. F.This is due to the CO rich atmosphere which, along with thick clouds of sulfur dioxide, generates the strongest greenhouse effect in the Solar System.Above the dense CO layer, thick clouds consisting mainly of sulfur dioxide and sulfuric acid droplets scatter about 9.The surface of Venus is effectively isothermal, which means that their is virtually no variation in Venus surface temperature between day and night, or the equator and the poles.The planets minute axial tilt less than 3 compared to Earths 2.The only appreciable variation in temperature occurs with altitude.The highest point on Venus, Maxwell Montes, is therefore the coolest point on the planet, with a temperature of about 6.K 3.C and an atmospheric pressure of about 4.MPa 4.Another common phenomena is Venus strong winds, which reach speeds of up to 8.Earth days.At this speed, these winds move up to 6.Earths fastest winds are only 1.Venus flybys have also indicated that its dense clouds are capable of producing lightning, much like the clouds on Earth.Their intermittent appearance indicates a pattern associated with weather activity, and the lightning rate is at least half of that on Earth.Historical Observations Although ancients peoples knew about Venus, some of the cultures thought it was two separate celestial objects the evening star and the morning star.Although the Babylonians realized that these two stars were in fact the same object as indicated in the Venus tablet of Ammisaduqa, dated 1.BCE it was not until the 6th century BCE that this became a common scientific understanding.Many cultures have identified the planet with their respective goddess of love and beauty.Venus is the Roman name for the goddess of love, while the Babylonians named it Ishtar and the Greeks called it Aphrodite.The Romans also designated the morning aspect of Venus Lucifer literally Light Bringer and the evening aspect as Vesper evening, supper, west, both of which were literal translations of the respective Greek names Phosphorus and Hesperus.Venus approaches the Sun in a 2.Earth.Credit NASAThe transit of Venus in front of the Sun was first observed in 1.Persian astronomer Avicenna, who concluded that Venus is closer to Earth than the Sun.In the 1.
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