NGC 6280 Nebula

NGC 6820 is an emission nebula that surrounds open cluster NGC 6823 in the constellation Vulpecula.

Emission nebulae are clouds of high temperature gas. The atoms in the cloud are energized by ultraviolet light from a nearby star and emit radiation as they fall back into lower energy states (in much the same way as a neon light). These nebulae are usually red because the predominant emission line of hydrogen happens to be red .

Velpecula is a faint constellation in the northern sky.

Fireworks in Helix nebula

Image taken by Subaru Telescope shows comet -shaped knots lighting up the Helix nebula.

A nebula is cloud of gas and dust in space. Some nebulas are regions where new stars are being formed, while others are the remains of dead or dying stars. Nebulas come in many shapes and sizes. There are four different types of nebulas- planetary , reflection, emision and absorption nebulas.

Helix nebula is located about 710 light years from Earth and was first planetary nebula in which knots were abserved.