The Gum Nebula is a huge constellation
in the Southern hemisphere, about 1000 light years away,
and extending over at least 40 degrees of the sky. The Gum
Nebula is thought to be the remnant of one or
more ancient supernovae. One pulsar in this region,
perhaps not associated with the Gum Nebula, is the
Vela Pulsar, which is about 800 light years away and
estimated to be about 11,000 years old.