A galaxy devoid of dark matter called NGC 1052-DF2 (shown) and others like it may have been formed in a collision of two galaxies 8 billion years ago.
Zili Shen, Pieter van Dokkum and NASA
A galaxy devoid of dark matter called NGC 1052-DF2 (shown) and others like it may have been formed in a collision of two galaxies 8 billion years ago.
Zili Shen, Pieter van Dokkum and NASA