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.

The ORC, cataloged as J1802–3353, has been nicknamed Kýklos by its discoverers, a word that means circle in Greek ... Perhaps Kýklos is a planetary nebula, which is the cast-off envelope ...

To better understand Jupiter’s primordial stages, researchers turned to the tiniest of the planet’s 92 known moons. Almathea ...

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 ...

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.

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 ...