India Over The Moon

Ending days of tension caused by heavy rains, Chandrayaan-1, India’s maiden moon mission, took off as planned in a textbook launch from the Satish Dhawan Space Centre at Sriharikota in Andhra Pradesh, about 80 km north of Chennai, on Wednesday morning.

“It is a historic moment for India. We have started our journey to the moon and the first leg has gone perfectly well,“ Dr G. Madhavan Nair, chairman of the Indian Space Research Organisation, said soon after the take-off at 6.22 am.

“Our baby is on way to the moon,” said the Chandrayaan project director, Mr Mylswamy Annadurai.

The indigenously built PSLV-CII rocket weighing 1380 kg is carrying a variety of precious payload. It was placed in the earth orbit 18.2 mins after the blast-off and is expected to reach the lunar orbit on November 8.

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Indian Space Research Organisation hopes tricolour on moon by October 28

Indian Space Research Organisation scientists are sitting pretty, preparations done and fingers crossed. The rocket PSLV-C11 is ready, the satellite Chandrayaan 1 is ready as well, and the country is waiting for the launch of what will be the first Indian step towards the moon and beyond.

Scientists are confident they will be able to launch India’s first mission to the moon — mainly an orbiter but also a 30-kg moon impact probe piggyback satellite — that is expected to hit the moon’s surface and unfurl the Indian flag between October 22 and 28. The only worry is that the north-eastern monsoon is expected to be more severe than usual. But Isro chairman Madhavan Nair was on Monday gung-ho about India’s entry into the elite club of space-faring nations.

Speaking exclusively to this newspaper, Dr Nair called upon the nation’s scientific community to rise to the opportunity and come up with innovative science studies by going to Venus, Mars, and other planets and their satellites in the solar system.

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Scientists learn what makes Northern Lights flare

The multicolored aurora borealis and aurora australis -- the Northern Lights and Southern Lights -- represent some of Earth's most dazzling natural displays.

Now scientists using data from five NASA satellites have learned what causes frequent auroral flare-ups that make this green, red and purple light show that shimmers above Earth's northernmost and southernmost regions even more spectacular.

Writing in the journal Science, the scientists said on Thursday that explosions of magnetic energy occurring a third of the way between Earth and the moon drive the sudden brightening of the Northern Lights and Southern Lights.

There had been debate among scientists dating back decades about what triggers these auroral flare-ups.

The findings from the THEMIS satellites and a network of 20 ground observatories in Canada and Alaska confirmed that it is due to a process called "magnetic reconnection." THEMIS stands for Time History of Events and Macroscale Interactions during Substorms mission.

Auroral displays are associated with the solar wind -- electrically charged particles continuously spewing outward from the sun. Earth's magnetic field lines reach far out into space as they store energy from the solar wind.

The researchers said that as two magnetic field lines come close together due to the storage of energy from the sun, a critical limit is reached and the lines reconnect, causing magnetic energy to be turned into kinetic energy and heat. The release of this energy sparks the auroral flare-ups.

"We showed that the process begins far from Earth first and propagates Earthward later," said Vassilis Angelopoulos of the University of California at Los Angeles, who led the research.

The moon is located about 240,000 miles from Earth, and this process is occurring roughly 80,000 miles from Earth.

The same mechanism causing the auroral brightening also can cause problems for satellites, power grids and communications systems on Earth and could endanger astronauts in space, the researchers said.