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 ?
50 north-east of the open cluster NGC 6631, is the diffuse nebula IC 1287.
M8 (NGC 6523) is a beautiful diffuse nebula, plainly visible to the naked eye as a glowing patch.
Not completely true of course, but there is no doubting that it is a superb and deservedly popular object--the finest diffuse nebula in the northern sky--and probably the first target many telescopes acquired during the winter months are pointed at.
Cataloged by Nicolas Louis de Lacaille as a diffuse nebula in 1751, 30 Doradus received its appellation 50 years later when Johann Bode included it in his Uranographia star atlas and accompanying catalog, in which he listed it as number 30 in Dorado.
It is a rich cluster of stars embedded in the diffuse nebula which extends slightly southwards away from the stars.
Continuing along the boundary between Ara and Norma southwards there is another interesting combination with a cluster and a diffuse nebula.

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