Glossary L
Light-Year: A unit of distance equal to the distance light travels in one year – 9,460 billion km (5,878 billion miles).
Local Group: A small cluster of more than forty member galaxies to which the Milky Way belongs.
Light-Year: A unit of distance equal to the distance light travels in one year – 9,460 billion km (5,878 billion miles).
Local Group: A small cluster of more than forty member galaxies to which the Milky Way belongs.