23 November 2008

Mission Aditya

After the Success of Chandrayaan 1, ISRO has now developed a Sun Mission called 'Aditya'. Aditya has been approved by the government and the work has been started. Aditya is planned to be launched by 2012. Aditya will study the outer most region of the Sun called 'Corona'.

The temperature of the solar corona goes beyond million degrees. From the Earth, corona can be seen only during total solar eclipses mainly due to the bright Solar disc and the scattering of the sunlight by the Earth's atmosphere. One has to go beyond the atmosphere to be able to mask the bright solar disc and study the corona.

Sun's Corona during the Solar Eclipse

"That's a mini satellite. In fact, the design is just getting completed. During solar maxim...which is happening...we would like to see the type of emissions which are taking place in the Sun and how it interacts with the ionosphere and atmosphere and so on. A basic understanding of the physical processes and continuous monitoring would help in taking necessary steps towards protecting ISRO's satellites either by switching them off or putting them on a stand-by mode as warranted by the background conditions.", says Madhavan Nair.

The satellite will remain in Earth's orbit and will study the Sun's Corona, sun spots and the Solar flare. 'Aditya' mission lies behind the international Sun missions 'Yohkoh', launched by Japan, collaborating with US and UK in 1991 and 'Hinode' in 2006. But 'Aditya' will be an Indian satellite with no collaboration.

4 comments:

Anonymous said...

err...isnt the outermost surface of the sun called corona?? then its temperature isnt in millions inc..its in 1000's...6000 i think..rite?

Inchara Prakash said...

That is the main reason for the Aditya mission... Sun's core temperature is 15 million deg but it reduces to 6000 at the surface. Yet the corona is abt 1 million deg (sometimes it reaches two). This has been a mystery and yet to be solved...

And corona is not the outer most surface.. Its an atmospheric layer..

Kavin said...

amazing facts... I hope Aditya solves the mystery...

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