
Space & PhysicsDecember 1, 1971
The Gum Nebula
This enormous cloud of ionized hydrogen is the largest known nebula in our galaxy. Its full extent and nature are currently the subject of considerable controversy among astrophysicists

The Gum Nebula
This enormous cloud of ionized hydrogen is the largest known nebula in our galaxy. Its full extent and nature are currently the subject of considerable controversy among astrophysicists