1.Dark side of the universe :Dark matter and dark energy
2.Traveling across the expanding universe.
3.How did our universe evolve?
4.Are we alone in the universe?
5.The cosmic microwave background radiation: a musical symphony
6.The relativistic arrow of time.
7.Beauty of variational principle in electrodynamics.
8.The interacting cosmological constant.
9.Lorentz Invariance : essence and applications