The Orion–Eridanus Superbubble, or Eridanus Soft X-ray Enhancement is a superbubble located west of the Orion Nebula. The region is formed from overlapping supernova remnants that may be associated with the Orion OB1 stellar association; the bubble is approximately 1200 ly across. It is the nearest superbubble to the Local Bubble containing the Sun, with the respective shock fronts being about 500 ly apart.
- Aschenbach, B.; Hermann-Michael Hahn, and Joachim Truemper (1998). The invisible sky: ROSAT and the age of X-ray astronomy. Springer. ISBN 978-0-387-94928-4.
- Sanders, Robert. "Bursting bubbles in the galactic disk appear to be source of hot gas permeating the Milky Way galaxy and its halo". Berkeley.
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