space nebulas

Pencil Nebula

The Pencil Nebula in Vela is a remnant of a supernova explosion that occurred about 11.000 years ago. It lies about 800 light years from Earth and spans a distance of about 5 light-years. The shock wave that created the nebula is traveling through space at about 500,000 km/hour, slamming into the interstellar medium and creating the bluish regions, which glow in the light of ionized oxygen, while the surrounding red regions are a cooler ionized hydrogen source.

Credit: David M. Jurasevich