The Nobel Physics Prize is awarded to three astronomers for their contributions on helping us to understand the cosmic evolution and the Earth in the Universe. P. J. E. Peebles from the Princeton University, USA, are given half of the prize, for his theoretical works in physical cosmology. Michel Mayor of the Geneva University, Switzerland, and Didier Queloz of the Cambridge University shared the other half of the prize, for their first discovery of a planet circling sun-like star. We give a popular introduction to their works.