Tensions have been high in the disputed Himalayan border area between the two nations in recent years, with India frequently accusing its neighbour of making incursions onto its territory.According to the Calcutta-based Telegraph , Indian troops had documented 329 sightings of unidentified objects over a lake in the border region between last August and February.The newspaper quoted military sources as saying the objects violated the Line of Actual Control (LAC) 155 times.The army called the Indian Institute of Astrophysics to identify the objects. "Our task was to determine whether these unidentified objects were celestial or terrestrial," astronomer Tushar Prabhu told the paper.Only once the objects' movements were noted in relation to the stars were they identified as planets.