The Vela supernova remnant is a supernova remnant (SNR)
about 900 light-years away for a supernova that would have become visible
to Earth on the order of 10,000 years ago.
It is one of the nearest known SN remnants and
is very bright in X-rays.
In the sky, it overlaps a more-distant SNR, Puppis A.
The first noting of the remnant was specifically
a nebula that forms part of it, NGC 2736,
aka the Pencil Nebula, which was cataloged in the 1800s.
In the 1960s, the Pencil Nebula and some radio sources in that part of
the sky were over time accepted to be a SN remnant.
An early-discovered pulsar, the Vela Pulsar, was
soon taken to be the stellar remnant left by the supernova,
which was thus a core collapse supernova.
Associated with the pulsar is a pulsar wind nebula (PWN),
a radio source termed Vela X.