However, the term nebula still refers to a cloud ... Diffuse nebulas are one stage in the circle of life in the Universe. They are areas of cosmic gas and dust that cause stars to be born.

A planetary nebula like this one forms when a dying star ... As the jet, a stream of gas and dust, wobbled (or precessed), it outlined a circle that created the rings around the Cat’s Eye.

Despite being a "dark nebula," the Circinus West molecular cloud ... tendril of the Circinus West molecular cloud, named the Cir-MMS region. At the heart of the Cir-MMS region is a large cavity ...

This discovery stems from four decades of X-ray observations of the Helix Nebula, located 650 light-years from Earth. The stream of X-ray radiation remained effectively constant over at least 20 ...

The dark nebula is part of the Circinus West molecular ... black tendril of the Circinus West molecular cloud, named the Cir-MMS region.