Prime Minister Narendra Modi has expressed grief over the demise of Professor Shashikumar Chitre. In a tweet, Mr Modi said, Professor Chitre will be remembered for his work in astrophysics and subjects like solar physics, gravitational lensing and science education.<br />'' <br />''<span style="color: #222222;">Prime Minister said, his valuable work will continue inspiring students in the times to come.</span><br />