Cosmology is a vast subject. It studies the origins, history, evolution and growth of our planet. The subject uses laws of physics, chemistry, etc. to understand the complexities present in the universe. The subjects studied under this field are dark matter, celestial objects, dark energy, worm-holes, etc. The different branches of cosmology are mythological cosmology, physical cosmology and philosophical cosmology. This book presents the complex subject of cosmology in the most comprehensible and easy to understand language. The topics covered in it deal with the core subjects of the field. The textbook is appropriate for those seeking detailed information in this area.