The basics of the Universe in terms and definitions

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
There are 1 names in this directory beginning with the letter B.
Big Bang
The huge “explosion” 13.7 billion years ago in which the universe (including all space, time and energy) is thought to have been created. According to this theory, the universe began in a super-dense, super-hot state and has been expanding and cooling ever since. The phrase was coined by Fred Hoyle during a 1949 radio broadcast.