Abstract: Historically,developments in physics and astronomy were closely linked to each other.Both played a pioneer role in the development of modern science and technology.Fundamental laws provided by physics plus the vast experimental laboratory provided by astronomy constitute together an ideal base for the development of science.A series of important breakthroughs achieved in the 20th century were due to this perfect combination.Today,they are again facing together even newer frontiers,and both hold promise for major new scientific developments.Every advance they make will certainly bring about higher and technologies,and will also push the civilization of mankind to a new level.