New Delhi, July 22 - Cloudy skies in large parts of northern and western India Wednesday marred a clear view of the century's longest total solar eclipse but the celestial spectacle was clearly visible over Varanasi.

Tens of thousands of people across the country rose early to see the eclipse that was to begin at the earliest at 5:29 a.m. and end at 7:41 a.m. in India.

It was to have been cleary visible in places like Surat, Indore, Bhopal, Varanasi, Patna, Taregna near Patna, Daman, Darjeeling, Dibrugarh, Gangtok, Gaya, Itanagar, Ujjain and Vadodra.

A partial eclipse was to have been visible in many other towns and cities.

A total eclipse occurred when the moon passes between the sun and the earth, completely obscuring the sun. During the eclipse, totality is visible only from a narrow track on the surface of the earth.

In the event however the solar eclipse could be watched clearly only over Varanasi, where thousands gathered along the Ganges.