Gautam Gangopadhyay is a Professor of Physics at the University of Calcutta. He is a former Regular Associate of the Abdus Salam International Centre for Theoretical Physics, Trieste. He has published more than eighty research papers in international journals. His areas of specialization are nuclear physics and astrophysics. In nuclear physics, he has worked in the field of experimental and theoretical nuclear structure. In astrophysics, his research includes application of nuclear reaction and Saha ionisation equation in nuclear processes that power the stars and create new elements.Anirban Kundu is a Professor of Physics at the University of Calcutta. He is a theoretical particle physicist working on the phenomenological aspects of high energy physics. His research interest includes Higgs physics, Flavour physics, and physics beyond the Standard Model. He is a Fellow of the Indian Academy of Sciences, and the National Academy of Sciences, India. He is also an Alexander von Humboldt Fellow, and a former Regular Associate of the Abdus Salam International Centre for Theoretical Physics, Trieste, Italy. He is also interested in cosmology.

• On Periodic Motion.- On Electromagnetism and Gravity.- The Calendar, the Day and the Hour.- Highways in the Sky.- Flickering Candles: Cepheid variable stars.- Stars that Breathe.

Gautam Gangopadhyay is a Professor of Physics at the University of Calcutta. He is a former Regular Associate of the Abdus Salam International Centre for Theoretical Physics, Trieste. He has published more than eighty research papers in international journals. His areas of specialization are nuclear physics and astrophysics. In nuclear physics, he has worked in the field of experimental and theoretical nuclear structure. In astrophysics, his research includes application of nuclear reaction and Saha ionisation equation in nuclear processes that power the stars and create new elements.Anirban Kundu is a Professor of Physics at the University of Calcutta. He is a theoretical particle physicist working on the phenomenological aspects of high energy physics. His research interest includes Higgs physics, Flavour physics, and physics beyond the Standard Model. He is a Fellow of the Indian Academy of Sciences, and the National Academy of Sciences, India. He is also an Alexander von Humboldt Fellow, and a former Regular Associate of the Abdus Salam International Centre for Theoretical Physics, Trieste, Italy. He is also interested in cosmology.

• On Periodic Motion.- On Electromagnetism and Gravity.- The Calendar, the Day and the Hour.- Highways in the Sky.- Flickering Candles: Cepheid variable stars.- Stars that Breathe.

Gautam Gangopadhyay is a Professor of Physics at the University of Calcutta. He is a former Regular Associate of the Abdus Salam International Centre for Theoretical Physics, Trieste. He has published more than eighty research papers in international journals. His areas of specialization are nuclear physics and astrophysics. In nuclear physics, he has worked in the field of experimental and theoretical nuclear structure. In astrophysics, his research includes application of nuclear reaction and Saha ionisation equation in nuclear processes that power the stars and create new elements.Anirban Kundu is a Professor of Physics at the University of Calcutta. He is a theoretical particle physicist working on the phenomenological aspects of high energy physics. His research interest includes Higgs physics, Flavour physics, and physics beyond the Standard Model. He is a Fellow of the Indian Academy of Sciences, and the National Academy of Sciences, India. He is also an Alexander von Humboldt Fellow, and a former Regular Associate of the Abdus Salam International Centre for Theoretical Physics, Trieste, Italy. He is also interested in cosmology.

• On Periodic Motion.- On Electromagnetism and Gravity.- The Calendar, the Day and the Hour.- Highways in the Sky.- Flickering Candles: Cepheid variable stars.- Stars that Breathe.