| Diffuse nebula | |
|---|---|
| supernova remnant | |
 The Vela Supernova Remnant | |
| Observation data: J2000.0 epoch | |
| Right ascension | 08h 35m 20.66s |
| Declination | −45° 10′ 35.2″ |
| Distance | 936+62 −55 ly (287+19 −17 [1] pc) |
| Apparent magnitude (V) | 12 |
| Apparent dimensions (V) | 8 degrees (approx.) |
| Constellation | Vela |
| Designations | Vela XYZ, Gum 16, SNR G263.9-03.3, 1E 0840.0-4430, RE J083854-430902 |
The Vela Supernova Remnant is a supernova remnant in the southern constellation Vela. Its source Type II supernova exploded approximately 11,000 years ago (and was about 900 light-years away). [1] The association of the Vela supernova remnant with the Vela Pulsar, made by astronomers at the University of Sydney in 1968, [2] was direct observational evidence that supernovae form neutron stars.
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The Vela Supernova Remnant includes NGC 2736. Viewed from Earth, the Vela Supernova Remnant overlaps the Puppis A supernova remnant, which is four times more distant. Both the Puppis and Vela remnants are among the largest and brightest features in the X-ray sky.
The Vela Supernova Remnant is one of the closest known to us. The Geminga pulsar is closer (and also resulted from a supernova), and in 1998 another near-Earth supernova remnant was discovered, RX J0852.0-4622, which from Earth's point of view appears to be contained in the southeastern part of the Vela remnant. This remnant was not seen earlier because when viewed in most wavelengths, it is lost in the Vela remnant. [3]
