molecular-cloud

Explanation: One of the most identifiable nebulae in the sky, the Horsehead Nebula in Orion, is part of a large, dark, molecular cloud.

What used to be considered a hole in the sky is now known to astronomers as a dark molecular cloud.

They tower above the surface of a molecular cloud on the edge of the nebula.

The Pleiades nebulosity is caused by a chance encounter between an open cluster of stars and a molecular cloud.

The complex is called the Vela Molecular Cloud Ridge, and may form part of the edge of the Orion spiral arm spur in the Milky Way galaxy.

An approximately one-light-year tall "pillar" of cold hydrogen towers above the wall of the molecular cloud.

Three nebulas contained inside the enormous Orion molecular cloud located 1, 500 light-years from Earth are shown in this mosaic WISE image.

The Nebula's glowing gas surrounds hot young stars at the edge of an immense interstellar molecular cloud only 1500 light-years away.

The spectacular Horsehead Nebula is actually a projection of cold gas and dust extending from the dense Orion Molecular Cloud.

The process blasted out material to form the bubble structure of glowing gas against denser material in a surrounding molecular cloud.

The entire cosmic vista spans over 30 light-years, near the edge of the Orion molecular cloud complex some 1, 500 light-years distant.

The giant molecular cloud, Mon R2, is impressively close, estimated to be only 2, 400 light-years or so away.

Searches for Massive Molecular Cloud Cores with CO Isotopes