PGC 6240, also known as AM 0139-655 or the White Rose Galaxy, is a very large and old galaxy in the southern constellation of Hydrus,[2] about 345 million light years away from Earth.

Appearing like a white rose in the sky, the galaxy has foggy shells of stars that rotate around a luminous center with few shells lying close to it while others at a distance.

Those distant from the center appear disconnected from the white rose.

[4] They include a population of relatively young globular clusters around 400 million years old, another group of older ones around 1 billion years old, and other ones even older than that.

This suggests that the younger clusters and shells formed in bouts of starburst star formation following the merger of the galaxy with another.