A cluster of stars within an intricate cloud of gas and dust.
1 The conditions in the outer strata should bear some resemblance to those existing in the gaseous nebula .
2 And the nebula in Draco 4373, seems to present an intermediate stage between the purely gaseous nebula and this one.
3 After the novae become fairly faint, the bright lines of the gaseous nebula spectrum are seen for the first time.
4 So it has come about that the picture of a hot gaseous nebula revolving as a unit body has given place to other pictures.
5 In other words, it is not wise to draw too fine a line between a gaseous nebula and one consisting of solid particles with gas.
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