Star streams

Astronomers discovered that stars in the Milky Way Galaxy move in two huge streams in opposite directions: one containing 2/5ths of the stars, the other with the remainder. This finding suggested an order in the movement of stars that was previously thought to be random.
 Jacobus Cornelis Kapteyn Netherlands 1904 Star streams

Astronomers discovered that stars in the Milky Way Galaxy move in two huge streams in opposite directions: one containing 2/5ths of the stars, the other with the remainder. This finding suggested an order in the movement of stars that was previously thought to be random.