Interstellar cloud

Interstellar cloud is the generic name given to accumulations of gas, plasma and dust in our galaxy. Depending on the density, size and temperature of a given cloud, the hydrogen in it can be neutral (H I regions), ionized (H II regions) (ie. a plasma), or molecular (molecular clouds). When insufficiently dense to be called a cloud, it may be referred to as interstellar dust or simply dust. Dust in an astronomical context typically has a different composition from the household meaning of dust.

Related Topics:
Plasma - Galaxy - Hydrogen - H I region - H II region - Molecular cloud

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