nebulosity

The quality or condition of being nebulous.

A nebula or a nebulalike object.

A mass of material constituting a nebula.

The state of being nebulous or cloudy; cloudiness; haziness; the essential character of a nebula.

The faint misty appearance surrounding certain stars; an ill-defined nebula without local condensation; also, a nebula in general.

The state or quality of being nebulous; cloudiness; haziness; mistiness; nebulousness.

The stuff of which a nebula is formed.

A nebula.