Venus-the clouded planet, Science

Venus-the Clouded Planet

Venus, our nearest planetary neighbour, only 40 million km away, has its surface hidden from view by a dense yellowish-white cloud, which extends to 80 km  above the surface (Fig).  Venus appears to be the third brightest object in the sky after the Sun and the Moon, because of  its short distance from us and because the white cloud reflects almost 76 per cent of  the sunlight that falls on it. Venus appears so bright at times that, under ideal atmospheric conditions,  it may be seen with the unaided eye  in daytime. Venus can be best seen about three hours after sunset when it is a night object or  about three  hours before sunrise when it  is a morning obiect. As you have  read in Unit 9, Venus appears to go through phases, quite hke those oi  the Moon. It requires almost 20 months for an observer to see Venus in all its phases. As  revealed from the space probes, Venus has turned out to be a broiling hot planet. The surface temperatures of Venus are around 480°C. The atmosphere of Venus is made up of  96 per cent carbon dioxide gas and clouds of  sulphuric acid withsmall quantities of hydrochloric and hydrofluoric acid. There we small traces of water vapour, nitrogen, argon, sulphur dioxide and carbon monoxide gases. The atmospheric pressure is 90 times the pressure we feel from the Earth's atmosphere. With its searing heat, crushing pressures and poisonous gases, Venus seems  less the goddess of love of mythology and more an incarnation of hell! Life cannot survive on Venus. The high surface temperat%e of Venus comes about through what is known as  the greenhouse effect. Sunlight passes through the clouds and atmosphere of Venus, and reaches its surface. The suqace on being heated, gives out infrared radiations. The carbon dioxide in the atmosphere of  Venus does not let the infrared radiation escape. Thus, the heat of  the Sun is efficiently trapped with only very little being able to escape. As a result,  the surface temperature rises.  

533_Venus-the Clouded Planet.png

Posted Date: 9/28/2012 2:22:07 AM | Location : United States







Related Discussions:- Venus-the clouded planet, Assignment Help, Ask Question on Venus-the clouded planet, Get Answer, Expert's Help, Venus-the clouded planet Discussions

Write discussion on Venus-the clouded planet
Your posts are moderated
Related Questions
Palaeontological Evidence: Palaeontology  is a branch of  earth sciences, which is essentially a study of plant and animal life in the past geological periods, millions of ye

Explain Nerve Supply of the Gastrointestinal Tract The gastrointestinal tract is supplied by nerves from both sympathetic and parasympathetic nervous system. The parasympatheti

Assessment is the process of collecting information to find out what students are learning. As we have examined different instructional models throughout this course we have learne

Define Fats - Nutritional Components Once the body stops eating, it begins to live on its fat. Fat storing depots 'adipocytes' are located in the different parts of the body. I

A lamp chimney force pump Replace the piston in the lift pump explained above with a one-hole stopper. Fit the piston rod by the hole. Fit the bottom of the chimney with a two-

how has Modern sequencing helped in our understanding of the human genome?

If I send you ab assignment can you finish it by midnight central time TONIGHT

Determine in brief about the soil texture The texture is generally determined by the relative proportions of sand, silt and clay.  If various size fractions of the particles co

Define the Structure of Ear - The Organ of Hearing The human ear consists of three sections: the outer ear, the middle ear and the inner ear as illustrated in Figure. The oute

describe the factors which decide the brad area of scientific activity