NGC 6357: 龙虾星云
2020年10月28日 NGC 6357: The Lobster Nebula Image Credit & Copyright: Steven Mohr Explanation: Why is the Lobster Nebula forming some of the most massive stars known? No one is yet sure. Cataloged as NGC 6357, the Lobster Nebula houses the open star cluster Pismis 24 near its center — a home to unusually bright and massive stars. The overall blue glo...