Chandrayaan-1 nears 75,000 km height, inches closer to Moon

October 25, 2008 at 6:46 pm | Posted in entertainment, History, India, Information, World | Leave a comment
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Bangalore, Oct 25 (PTI) India’s Chandrayaan-1 has covered 20 per cent of its journey towards Moon as ISRO scientists today performed the second orbit-raising manoeuvre. The lunar spacecraft’s on-board 440 Newton Liquid engine was fired for about 16 minutes from 5.48 am.

With this engine firing, Chandrayaan-1’s apogee (farthest point to earth) has been raised to 74,715 km, while its perigee (closest point to earth) has been raised to 336 km, ISRO spokesperson S Satish said. ISRO chairman G Madhavan Nair termed today’s orbit-raising operation as “record-breaking”.

“So far, Indian-made satellites have reached to a height of only 36,000 km. Today’s firing has taken Chandrayaan-1 to something like 75,000 km.

That’s well beyond what we have reached so far. It was a good event, and done precisely,” Nair, also secretary in the Department of Space, said.

Indicating the complexity of the India’s first unmanned lunar mission, he said when the spacecraft is closer to the earth, its gravitational field is well defined and scientists can shape the trajectory. “When you go further and further, earth’s influence comes down.

Influence of Moon and Sun becomes predominant. Even other planets will have an influence on it,” he said.

Moon lies at a distance of about 3,84,000 km from earth. ISRO officials said Chandrayaan-1 is expected to settle into lunar orbit, 100 km above Moon, on November 8.

All systems on board the spacecraft, launched on October 22, were functioning normally, ISRO said, adding that further orbit-raising manoeuvres to take Chandrayaan-1 to still higher orbits are planned in the next few days.

Chandrayaan – India s lunar mission

October 16, 2008 at 12:31 pm | Posted in America, entertainment, explore, History, India, indian heritage, Information, news, science, USA, World | Leave a comment
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CHANDRAYAAN-1: India’s first mission to the Moon
India is all set to reach the moon and that too in its own way, literally! The first Moon mission, an unmanned remote-sensing satellite called Chandrayaan-I , is set for launch. The results of this initiative is which would a long way in realizing the value of our closest celestial body and the emergence of new possibilities. Few facts on Chandrayaan * This spacecraft weighs 1304 kg (590 initial orbit mass and 504 kg dry mass) * The estimated costs for this ambitious project would be INR 3.8 billion * The power generation would be through a canted single-sided solar array to provide required power, 700 W at peak. * During eclipse the spacecraft will be powered by Lithium ion (Li-Ion) batteries. * The spacecraft carries propellant for a mission life of 2 years. The mission aims to carry out high resolution mapping of topographic features in 3D, distribution of minerals and elemental chemical species, and look for water ice in its polar regions. ISRO hopes to launch Chandrayaan-1 from the Satish Dhawan Space Centre near Shriharikota this year.

 “THE MOON” with the history of the early solar system etched on it beckons mankind from time immemorial to admire its marvels and discover its secrets. Understanding the moon provides a pathway to unravel the early evolution of the solar system and that of the planet earth.

Through the ages, the Moon, our closest celestial body has aroused curiosity in our mind much more than any other objects in the sky. This led to scientific study of the Moon, driven by human desire and quest for knowledge. This is also reflected in the ancient verse. Exploration of the moon got a boost with the advent of the space age and the decades of sixties and seventies saw a myriad of successful unmanned and manned missions to moon.Following this, a hiatus of about one and a half-decade followed. During this period we refined our knowledge about the origin and evolution of the moon and its place as a link to understand the early history of the Solar System and of the earth.   

However, new questions about lunar evolution also emerged and new possibilities of using the moon as a platform for further exploration of the solar system and beyond were formulated. Moon again became the prime target for exploration and a new renaissance of rejuvenated interest dawned. All the major space faring nations of the world started planning missions to explore the moon and also to utilize moon as a potential base for space exploration.
 
The idea of undertaking an Indian scientific mission to Moon was initially mooted in a meeting of the Indian Academy of Sciences in 1999 that was followed up by discussions in the Astronautical Society of India in 2000. Based on the recommendations made by the learned members of these forums, a National Lunar Mission Task Force was constituted by the Indian Space Research Organisation (ISRO). Leading Indian scientists and technologists participated in the deliberations of the Task Force that provided an assessment on the feasibility of an Indian Mission to the Moon as well as dwelt on the focus of such a mission and its possible configuration.
 
The task force recommended that given the technical expertise of ISRO it will be extreme worthwhile to plan an Indian Mission to the Moon. It also provided specific inputs such as the primary scientific objectives of such a mission, plausible instruments to meet these objectives, launch and spacecraft technologies that need to be developed and suggested the need for setting up of a Deep Space Network (DSN) station in India for communication with the lunar orbiting spacecraft. The team also provided a provisional budgetary estimate.
 
The Study Report of the Task Team was discussed in April 2003 by a peer group of about 100 eminent Indian scientists representing various fields of planetary & space sciences, earth sciences, physics, chemistry, astronomy, astrophysics and engineering and communication sciences. After detailed discussions, it was unanimously recommended that India should undertake the Mission to Moon, particularly in view of the renowned international interest on moon with several exciting missions planned for the new millennium. In addition, such a mission will provide the needed thrust to basic science and engineering research in the country including new challenges to ISRO to go beyond the geostationary orbit. Further, such a project will also help bringing in young talents to the arena of fundamental research. The Academia, in particular, the university scientists would also find participation in such a project intellectually rewarding.
 
Subsequently, Government of India approved ISRO’s proposal for the first Indian Moon Mission, called Chandrayaan-1 in November 2003.

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