Figure 20-22: R I V U X G
The Vela Nebula—A Supernova Remnant The Vela Nebula is embedded in an even larger remnant called the Gum Nebula. The Vela supernova explosion occurred about 11,000 years ago, and the remnant now has a diameter of about 700 pc (2300 ly).
(© Axel Mellinger)