ISRO Chairman Sivan offers prayers to Lord Venkateswara Om Prakash July 4, 2018 ISRO Chairman Sivan today visited Tirumala hill shrine and offered his prayers to Lord Venkateswara. He had darshan of the deity during VIP break. After darshan, temple priests supplied holy teerdh and Prasad to him at Ranganayakula mandapam. Live Updates ISRO Chairman, ISRO Sivan