diffuse nebula

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Noun1.diffuse nebula - a cluster of stars within an intricate cloud of gas and dustdiffuse nebula - a cluster of stars within an intricate cloud of gas and dust
nebula - an immense cloud of gas (mainly hydrogen) and dust in interstellar space
Orion, Hunter - a constellation on the equator to the east of Taurus; contains Betelgeuse and Rigel
References in periodicals archive ?
After a brief history of astronomy and astrophysics, the book is divided into six sections covering the solar system, diffuse nebulas and star birth, star clusters, planetary nebulas, decline & death of giant stars, and galaxies.

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